diff --git a/test/berlin/berlin_000001_000019_gtFine_color.png b/test/berlin/berlin_000001_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000001_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000002_000019_gtFine_color.png b/test/berlin/berlin_000002_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000002_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000002_000019_gtFine_instanceIds.png b/test/berlin/berlin_000002_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000002_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000003_000019_gtFine_instanceIds.png b/test/berlin/berlin_000003_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000003_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000004_000019_gtFine_labelIds.png b/test/berlin/berlin_000004_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000004_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000005_000019_gtFine_instanceIds.png b/test/berlin/berlin_000005_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000005_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000006_000019_gtFine_color.png b/test/berlin/berlin_000006_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000006_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000008_000019_gtFine_labelIds.png b/test/berlin/berlin_000008_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000008_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000009_000019_gtFine_color.png b/test/berlin/berlin_000009_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000009_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000011_000019_gtFine_color.png b/test/berlin/berlin_000011_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000011_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000012_000019_gtFine_color.png b/test/berlin/berlin_000012_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000012_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000012_000019_gtFine_instanceIds.png b/test/berlin/berlin_000012_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000012_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000012_000019_gtFine_labelIds.png b/test/berlin/berlin_000012_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000012_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000013_000019_gtFine_labelIds.png b/test/berlin/berlin_000013_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000013_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000014_000019_gtFine_instanceIds.png b/test/berlin/berlin_000014_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000014_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000015_000019_gtFine_labelIds.png b/test/berlin/berlin_000015_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000015_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000019_000019_gtFine_labelIds.png b/test/berlin/berlin_000019_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000019_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000020_000019_gtFine_color.png b/test/berlin/berlin_000020_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000020_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000020_000019_gtFine_instanceIds.png b/test/berlin/berlin_000020_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000020_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000026_000019_gtFine_instanceIds.png b/test/berlin/berlin_000026_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000026_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000026_000019_gtFine_labelIds.png b/test/berlin/berlin_000026_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000026_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000027_000019_gtFine_instanceIds.png b/test/berlin/berlin_000027_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000027_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000027_000019_gtFine_labelIds.png b/test/berlin/berlin_000027_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000027_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000030_000019_gtFine_color.png b/test/berlin/berlin_000030_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000030_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000030_000019_gtFine_labelIds.png b/test/berlin/berlin_000030_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000030_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000031_000019_gtFine_instanceIds.png b/test/berlin/berlin_000031_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000031_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000031_000019_gtFine_labelIds.png b/test/berlin/berlin_000031_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000031_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000033_000019_gtFine_color.png b/test/berlin/berlin_000033_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000033_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000037_000019_gtFine_color.png b/test/berlin/berlin_000037_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000037_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000038_000019_gtFine_color.png b/test/berlin/berlin_000038_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000038_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000038_000019_gtFine_instanceIds.png b/test/berlin/berlin_000038_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000038_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000039_000019_gtFine_instanceIds.png b/test/berlin/berlin_000039_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000039_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000040_000019_gtFine_instanceIds.png b/test/berlin/berlin_000040_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000040_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000041_000019_gtFine_color.png b/test/berlin/berlin_000041_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000041_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000042_000019_gtFine_color.png b/test/berlin/berlin_000042_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000042_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000042_000019_gtFine_labelIds.png b/test/berlin/berlin_000042_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000042_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000043_000019_gtFine_labelIds.png b/test/berlin/berlin_000043_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000043_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000045_000019_gtFine_labelIds.png b/test/berlin/berlin_000045_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000045_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000046_000019_gtFine_color.png b/test/berlin/berlin_000046_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000046_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000046_000019_gtFine_instanceIds.png b/test/berlin/berlin_000046_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000046_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000047_000019_gtFine_instanceIds.png b/test/berlin/berlin_000047_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000047_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000049_000019_gtFine_color.png b/test/berlin/berlin_000049_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000049_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000049_000019_gtFine_instanceIds.png b/test/berlin/berlin_000049_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000049_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000049_000019_gtFine_labelIds.png b/test/berlin/berlin_000049_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000049_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000051_000019_gtFine_color.png b/test/berlin/berlin_000051_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000051_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000051_000019_gtFine_instanceIds.png b/test/berlin/berlin_000051_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000051_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000053_000019_gtFine_labelIds.png b/test/berlin/berlin_000053_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000053_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000054_000019_gtFine_labelIds.png b/test/berlin/berlin_000054_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000054_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000055_000019_gtFine_labelIds.png b/test/berlin/berlin_000055_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000055_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000057_000019_gtFine_instanceIds.png b/test/berlin/berlin_000057_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000057_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000058_000019_gtFine_instanceIds.png b/test/berlin/berlin_000058_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000058_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000058_000019_gtFine_labelIds.png b/test/berlin/berlin_000058_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000058_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000059_000019_gtFine_instanceIds.png b/test/berlin/berlin_000059_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000059_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000059_000019_gtFine_labelIds.png b/test/berlin/berlin_000059_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000059_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000060_000019_gtFine_color.png b/test/berlin/berlin_000060_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000060_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000060_000019_gtFine_labelIds.png b/test/berlin/berlin_000060_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000060_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000061_000019_gtFine_labelIds.png b/test/berlin/berlin_000061_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000061_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000062_000019_gtFine_instanceIds.png b/test/berlin/berlin_000062_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000062_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000063_000019_gtFine_color.png b/test/berlin/berlin_000063_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000063_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000063_000019_gtFine_instanceIds.png b/test/berlin/berlin_000063_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000063_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000064_000019_gtFine_color.png b/test/berlin/berlin_000064_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000064_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000065_000019_gtFine_instanceIds.png b/test/berlin/berlin_000065_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000065_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000066_000019_gtFine_labelIds.png b/test/berlin/berlin_000066_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000066_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000070_000019_gtFine_color.png b/test/berlin/berlin_000070_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000070_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000070_000019_gtFine_labelIds.png b/test/berlin/berlin_000070_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000070_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000073_000019_gtFine_color.png b/test/berlin/berlin_000073_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000073_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000074_000019_gtFine_instanceIds.png b/test/berlin/berlin_000074_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000074_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000076_000019_gtFine_labelIds.png b/test/berlin/berlin_000076_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000076_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000077_000019_gtFine_color.png b/test/berlin/berlin_000077_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000077_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000077_000019_gtFine_labelIds.png b/test/berlin/berlin_000077_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000077_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000078_000019_gtFine_color.png b/test/berlin/berlin_000078_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000078_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000080_000019_gtFine_instanceIds.png b/test/berlin/berlin_000080_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000080_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000080_000019_gtFine_labelIds.png b/test/berlin/berlin_000080_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000080_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000081_000019_gtFine_labelIds.png b/test/berlin/berlin_000081_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000081_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000082_000019_gtFine_color.png b/test/berlin/berlin_000082_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000082_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000086_000019_gtFine_instanceIds.png b/test/berlin/berlin_000086_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000086_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000087_000019_gtFine_labelIds.png b/test/berlin/berlin_000087_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000087_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000088_000019_gtFine_instanceIds.png b/test/berlin/berlin_000088_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000088_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000089_000019_gtFine_instanceIds.png b/test/berlin/berlin_000089_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000089_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000091_000019_gtFine_color.png b/test/berlin/berlin_000091_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000091_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000091_000019_gtFine_instanceIds.png b/test/berlin/berlin_000091_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000091_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000091_000019_gtFine_labelIds.png b/test/berlin/berlin_000091_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000091_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000092_000019_gtFine_color.png b/test/berlin/berlin_000092_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000092_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000095_000019_gtFine_color.png b/test/berlin/berlin_000095_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000095_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000096_000019_gtFine_instanceIds.png b/test/berlin/berlin_000096_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000096_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000096_000019_gtFine_labelIds.png b/test/berlin/berlin_000096_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000096_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000097_000019_gtFine_instanceIds.png b/test/berlin/berlin_000097_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000097_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000097_000019_gtFine_labelIds.png b/test/berlin/berlin_000097_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000097_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000098_000019_gtFine_instanceIds.png b/test/berlin/berlin_000098_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000098_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000099_000019_gtFine_instanceIds.png b/test/berlin/berlin_000099_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000099_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000100_000019_gtFine_color.png b/test/berlin/berlin_000100_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000100_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000100_000019_gtFine_labelIds.png b/test/berlin/berlin_000100_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000100_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000101_000019_gtFine_instanceIds.png b/test/berlin/berlin_000101_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000101_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000101_000019_gtFine_labelIds.png b/test/berlin/berlin_000101_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000101_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000104_000019_gtFine_color.png b/test/berlin/berlin_000104_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000104_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000106_000019_gtFine_labelIds.png b/test/berlin/berlin_000106_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000106_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000107_000019_gtFine_color.png b/test/berlin/berlin_000107_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000107_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000108_000019_gtFine_instanceIds.png b/test/berlin/berlin_000108_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000108_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000109_000019_gtFine_instanceIds.png b/test/berlin/berlin_000109_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000109_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000110_000019_gtFine_instanceIds.png b/test/berlin/berlin_000110_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000110_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000110_000019_gtFine_labelIds.png b/test/berlin/berlin_000110_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000110_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000113_000019_gtFine_color.png b/test/berlin/berlin_000113_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000113_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000114_000019_gtFine_color.png b/test/berlin/berlin_000114_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000114_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000116_000019_gtFine_instanceIds.png b/test/berlin/berlin_000116_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000116_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000116_000019_gtFine_labelIds.png b/test/berlin/berlin_000116_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000116_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000117_000019_gtFine_color.png b/test/berlin/berlin_000117_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000117_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000117_000019_gtFine_instanceIds.png b/test/berlin/berlin_000117_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000117_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000117_000019_gtFine_labelIds.png b/test/berlin/berlin_000117_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000117_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000118_000019_gtFine_color.png b/test/berlin/berlin_000118_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000118_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000122_000019_gtFine_color.png b/test/berlin/berlin_000122_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000122_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000122_000019_gtFine_instanceIds.png b/test/berlin/berlin_000122_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000122_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000122_000019_gtFine_labelIds.png b/test/berlin/berlin_000122_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000122_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000123_000019_gtFine_instanceIds.png b/test/berlin/berlin_000123_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000123_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000123_000019_gtFine_labelIds.png b/test/berlin/berlin_000123_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000123_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000124_000019_gtFine_instanceIds.png b/test/berlin/berlin_000124_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000124_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000125_000019_gtFine_color.png b/test/berlin/berlin_000125_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000125_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000125_000019_gtFine_labelIds.png b/test/berlin/berlin_000125_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000125_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000126_000019_gtFine_color.png b/test/berlin/berlin_000126_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000126_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000129_000019_gtFine_color.png b/test/berlin/berlin_000129_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000129_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000129_000019_gtFine_labelIds.png b/test/berlin/berlin_000129_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000129_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000132_000019_gtFine_instanceIds.png b/test/berlin/berlin_000132_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000132_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000133_000019_gtFine_instanceIds.png b/test/berlin/berlin_000133_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000133_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000133_000019_gtFine_labelIds.png b/test/berlin/berlin_000133_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000133_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000134_000019_gtFine_labelIds.png b/test/berlin/berlin_000134_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000134_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000135_000019_gtFine_color.png b/test/berlin/berlin_000135_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000135_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000135_000019_gtFine_instanceIds.png b/test/berlin/berlin_000135_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000135_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000135_000019_gtFine_labelIds.png b/test/berlin/berlin_000135_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000135_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000138_000019_gtFine_labelIds.png b/test/berlin/berlin_000138_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000138_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000139_000019_gtFine_color.png b/test/berlin/berlin_000139_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000139_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000139_000019_gtFine_labelIds.png b/test/berlin/berlin_000139_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000139_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000144_000019_gtFine_color.png b/test/berlin/berlin_000144_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000144_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000144_000019_gtFine_instanceIds.png b/test/berlin/berlin_000144_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000144_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000147_000019_gtFine_labelIds.png b/test/berlin/berlin_000147_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000147_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000148_000019_gtFine_color.png b/test/berlin/berlin_000148_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000148_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000150_000019_gtFine_labelIds.png b/test/berlin/berlin_000150_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000150_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000151_000019_gtFine_labelIds.png b/test/berlin/berlin_000151_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000151_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000152_000019_gtFine_instanceIds.png b/test/berlin/berlin_000152_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000152_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000153_000019_gtFine_color.png b/test/berlin/berlin_000153_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000153_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000153_000019_gtFine_instanceIds.png b/test/berlin/berlin_000153_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000153_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000154_000019_gtFine_color.png b/test/berlin/berlin_000154_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000154_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000155_000019_gtFine_instanceIds.png b/test/berlin/berlin_000155_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000155_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000157_000019_gtFine_color.png b/test/berlin/berlin_000157_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000157_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000158_000019_gtFine_color.png b/test/berlin/berlin_000158_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000158_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000161_000019_gtFine_instanceIds.png b/test/berlin/berlin_000161_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000161_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000162_000019_gtFine_color.png b/test/berlin/berlin_000162_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000162_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000163_000019_gtFine_labelIds.png b/test/berlin/berlin_000163_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000163_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000164_000019_gtFine_labelIds.png b/test/berlin/berlin_000164_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000164_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000165_000019_gtFine_color.png b/test/berlin/berlin_000165_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000165_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000165_000019_gtFine_labelIds.png b/test/berlin/berlin_000165_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000165_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000166_000019_gtFine_color.png b/test/berlin/berlin_000166_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000166_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000166_000019_gtFine_instanceIds.png b/test/berlin/berlin_000166_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000166_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000167_000019_gtFine_instanceIds.png b/test/berlin/berlin_000167_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000167_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000168_000019_gtFine_instanceIds.png b/test/berlin/berlin_000168_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000168_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000168_000019_gtFine_labelIds.png b/test/berlin/berlin_000168_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000168_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000169_000019_gtFine_color.png b/test/berlin/berlin_000169_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000169_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000169_000019_gtFine_instanceIds.png b/test/berlin/berlin_000169_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000169_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000169_000019_gtFine_labelIds.png b/test/berlin/berlin_000169_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000169_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000170_000019_gtFine_instanceIds.png b/test/berlin/berlin_000170_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000170_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000171_000019_gtFine_color.png b/test/berlin/berlin_000171_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000171_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000172_000019_gtFine_labelIds.png b/test/berlin/berlin_000172_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000172_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000175_000019_gtFine_color.png b/test/berlin/berlin_000175_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000175_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000176_000019_gtFine_color.png b/test/berlin/berlin_000176_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000176_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000176_000019_gtFine_instanceIds.png b/test/berlin/berlin_000176_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000176_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000177_000019_gtFine_instanceIds.png b/test/berlin/berlin_000177_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000177_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000179_000019_gtFine_instanceIds.png b/test/berlin/berlin_000179_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000179_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000180_000019_gtFine_color.png b/test/berlin/berlin_000180_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000180_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000182_000019_gtFine_instanceIds.png b/test/berlin/berlin_000182_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000182_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000183_000019_gtFine_instanceIds.png b/test/berlin/berlin_000183_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000183_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000184_000019_gtFine_color.png b/test/berlin/berlin_000184_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000184_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000184_000019_gtFine_instanceIds.png b/test/berlin/berlin_000184_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000184_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000184_000019_gtFine_labelIds.png b/test/berlin/berlin_000184_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000184_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000185_000019_gtFine_labelIds.png b/test/berlin/berlin_000185_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000185_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000187_000019_gtFine_color.png b/test/berlin/berlin_000187_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000187_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000188_000019_gtFine_color.png b/test/berlin/berlin_000188_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000188_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000189_000019_gtFine_labelIds.png b/test/berlin/berlin_000189_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000189_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000192_000019_gtFine_labelIds.png b/test/berlin/berlin_000192_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000192_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000193_000019_gtFine_labelIds.png b/test/berlin/berlin_000193_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000193_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000195_000019_gtFine_instanceIds.png b/test/berlin/berlin_000195_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000195_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000197_000019_gtFine_color.png b/test/berlin/berlin_000197_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000197_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000198_000019_gtFine_color.png b/test/berlin/berlin_000198_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000198_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000200_000019_gtFine_instanceIds.png b/test/berlin/berlin_000200_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000200_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000201_000019_gtFine_color.png b/test/berlin/berlin_000201_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000201_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000201_000019_gtFine_instanceIds.png b/test/berlin/berlin_000201_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000201_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000201_000019_gtFine_labelIds.png b/test/berlin/berlin_000201_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000201_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000205_000019_gtFine_color.png b/test/berlin/berlin_000205_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000205_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000206_000019_gtFine_color.png b/test/berlin/berlin_000206_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000206_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000206_000019_gtFine_labelIds.png b/test/berlin/berlin_000206_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000206_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000207_000019_gtFine_instanceIds.png b/test/berlin/berlin_000207_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000207_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000207_000019_gtFine_labelIds.png b/test/berlin/berlin_000207_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000207_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000208_000019_gtFine_instanceIds.png b/test/berlin/berlin_000208_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000208_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000210_000019_gtFine_instanceIds.png b/test/berlin/berlin_000210_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000210_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000210_000019_gtFine_labelIds.png b/test/berlin/berlin_000210_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000210_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000211_000019_gtFine_instanceIds.png b/test/berlin/berlin_000211_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000211_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000211_000019_gtFine_labelIds.png b/test/berlin/berlin_000211_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000211_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000212_000019_gtFine_color.png b/test/berlin/berlin_000212_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000212_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000215_000019_gtFine_color.png b/test/berlin/berlin_000215_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000215_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000216_000019_gtFine_color.png b/test/berlin/berlin_000216_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000216_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000216_000019_gtFine_instanceIds.png b/test/berlin/berlin_000216_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000216_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000217_000019_gtFine_labelIds.png b/test/berlin/berlin_000217_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000217_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000219_000019_gtFine_color.png b/test/berlin/berlin_000219_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000219_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000219_000019_gtFine_instanceIds.png b/test/berlin/berlin_000219_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000219_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000222_000019_gtFine_instanceIds.png b/test/berlin/berlin_000222_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000222_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000222_000019_gtFine_labelIds.png b/test/berlin/berlin_000222_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000222_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000223_000019_gtFine_color.png b/test/berlin/berlin_000223_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000223_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000224_000019_gtFine_color.png b/test/berlin/berlin_000224_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000224_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000224_000019_gtFine_instanceIds.png b/test/berlin/berlin_000224_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000224_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000224_000019_gtFine_labelIds.png b/test/berlin/berlin_000224_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000224_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000225_000019_gtFine_instanceIds.png b/test/berlin/berlin_000225_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000225_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000225_000019_gtFine_labelIds.png b/test/berlin/berlin_000225_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000225_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000227_000019_gtFine_color.png b/test/berlin/berlin_000227_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000227_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000228_000019_gtFine_color.png b/test/berlin/berlin_000228_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000228_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000228_000019_gtFine_labelIds.png b/test/berlin/berlin_000228_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000228_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000229_000019_gtFine_labelIds.png b/test/berlin/berlin_000229_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000229_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000232_000019_gtFine_labelIds.png b/test/berlin/berlin_000232_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000232_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000233_000019_gtFine_instanceIds.png b/test/berlin/berlin_000233_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000233_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000233_000019_gtFine_labelIds.png b/test/berlin/berlin_000233_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000233_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000234_000019_gtFine_color.png b/test/berlin/berlin_000234_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000234_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000234_000019_gtFine_labelIds.png b/test/berlin/berlin_000234_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000234_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000238_000019_gtFine_color.png b/test/berlin/berlin_000238_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000238_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000238_000019_gtFine_labelIds.png b/test/berlin/berlin_000238_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000238_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000240_000019_gtFine_labelIds.png b/test/berlin/berlin_000240_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000240_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000241_000019_gtFine_labelIds.png b/test/berlin/berlin_000241_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000241_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000242_000019_gtFine_instanceIds.png b/test/berlin/berlin_000242_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000242_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000244_000019_gtFine_instanceIds.png b/test/berlin/berlin_000244_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000244_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000245_000019_gtFine_color.png b/test/berlin/berlin_000245_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000245_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000245_000019_gtFine_instanceIds.png b/test/berlin/berlin_000245_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000245_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000247_000019_gtFine_labelIds.png b/test/berlin/berlin_000247_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000247_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000249_000019_gtFine_color.png b/test/berlin/berlin_000249_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000249_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000252_000019_gtFine_color.png b/test/berlin/berlin_000252_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000252_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000253_000019_gtFine_instanceIds.png b/test/berlin/berlin_000253_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000253_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000254_000019_gtFine_instanceIds.png b/test/berlin/berlin_000254_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000254_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000255_000019_gtFine_color.png b/test/berlin/berlin_000255_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000255_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000255_000019_gtFine_instanceIds.png b/test/berlin/berlin_000255_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000255_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000256_000019_gtFine_color.png b/test/berlin/berlin_000256_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000256_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000256_000019_gtFine_labelIds.png b/test/berlin/berlin_000256_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000256_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000259_000019_gtFine_color.png b/test/berlin/berlin_000259_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000259_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000260_000019_gtFine_instanceIds.png b/test/berlin/berlin_000260_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000260_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000261_000019_gtFine_instanceIds.png b/test/berlin/berlin_000261_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000261_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000263_000019_gtFine_color.png b/test/berlin/berlin_000263_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000263_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000263_000019_gtFine_labelIds.png b/test/berlin/berlin_000263_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000263_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000264_000019_gtFine_color.png b/test/berlin/berlin_000264_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000264_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000267_000019_gtFine_color.png b/test/berlin/berlin_000267_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000267_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000267_000019_gtFine_instanceIds.png b/test/berlin/berlin_000267_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000267_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000268_000019_gtFine_color.png b/test/berlin/berlin_000268_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000268_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000268_000019_gtFine_instanceIds.png b/test/berlin/berlin_000268_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000268_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000270_000019_gtFine_color.png b/test/berlin/berlin_000270_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000270_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000272_000019_gtFine_labelIds.png b/test/berlin/berlin_000272_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000272_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000274_000019_gtFine_color.png b/test/berlin/berlin_000274_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000274_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000274_000019_gtFine_labelIds.png b/test/berlin/berlin_000274_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000274_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000275_000019_gtFine_labelIds.png b/test/berlin/berlin_000275_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000275_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000276_000019_gtFine_instanceIds.png b/test/berlin/berlin_000276_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000276_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000277_000019_gtFine_color.png b/test/berlin/berlin_000277_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000277_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000278_000019_gtFine_labelIds.png b/test/berlin/berlin_000278_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000278_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000279_000019_gtFine_instanceIds.png b/test/berlin/berlin_000279_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000279_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000279_000019_gtFine_labelIds.png b/test/berlin/berlin_000279_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000279_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000281_000019_gtFine_color.png b/test/berlin/berlin_000281_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000281_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000282_000019_gtFine_instanceIds.png b/test/berlin/berlin_000282_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000282_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000282_000019_gtFine_labelIds.png b/test/berlin/berlin_000282_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000282_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000283_000019_gtFine_labelIds.png b/test/berlin/berlin_000283_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000283_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000284_000019_gtFine_instanceIds.png b/test/berlin/berlin_000284_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000284_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000285_000019_gtFine_color.png b/test/berlin/berlin_000285_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000285_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000285_000019_gtFine_instanceIds.png b/test/berlin/berlin_000285_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000285_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000285_000019_gtFine_labelIds.png b/test/berlin/berlin_000285_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000285_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000286_000019_gtFine_color.png b/test/berlin/berlin_000286_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000286_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000289_000019_gtFine_color.png b/test/berlin/berlin_000289_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000289_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000293_000019_gtFine_instanceIds.png b/test/berlin/berlin_000293_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000293_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000294_000019_gtFine_instanceIds.png b/test/berlin/berlin_000294_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000294_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000294_000019_gtFine_labelIds.png b/test/berlin/berlin_000294_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000294_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000295_000019_gtFine_instanceIds.png b/test/berlin/berlin_000295_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000295_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000296_000019_gtFine_color.png b/test/berlin/berlin_000296_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000296_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000298_000019_gtFine_labelIds.png b/test/berlin/berlin_000298_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000298_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000299_000019_gtFine_color.png b/test/berlin/berlin_000299_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000299_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000300_000019_gtFine_color.png b/test/berlin/berlin_000300_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000300_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000302_000019_gtFine_labelIds.png b/test/berlin/berlin_000302_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000302_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000303_000019_gtFine_color.png b/test/berlin/berlin_000303_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000303_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000303_000019_gtFine_instanceIds.png b/test/berlin/berlin_000303_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000303_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000303_000019_gtFine_labelIds.png b/test/berlin/berlin_000303_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000303_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000304_000019_gtFine_labelIds.png b/test/berlin/berlin_000304_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000304_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000305_000019_gtFine_instanceIds.png b/test/berlin/berlin_000305_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000305_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000307_000019_gtFine_color.png b/test/berlin/berlin_000307_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000307_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000308_000019_gtFine_color.png b/test/berlin/berlin_000308_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000308_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000308_000019_gtFine_labelIds.png b/test/berlin/berlin_000308_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000308_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000310_000019_gtFine_color.png b/test/berlin/berlin_000310_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000310_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000312_000019_gtFine_instanceIds.png b/test/berlin/berlin_000312_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000312_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000313_000019_gtFine_color.png b/test/berlin/berlin_000313_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000313_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000314_000019_gtFine_color.png b/test/berlin/berlin_000314_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000314_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000314_000019_gtFine_instanceIds.png b/test/berlin/berlin_000314_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000314_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000315_000019_gtFine_instanceIds.png b/test/berlin/berlin_000315_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000315_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000315_000019_gtFine_labelIds.png b/test/berlin/berlin_000315_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000315_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000319_000019_gtFine_labelIds.png b/test/berlin/berlin_000319_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000319_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000320_000019_gtFine_instanceIds.png b/test/berlin/berlin_000320_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000320_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000320_000019_gtFine_labelIds.png b/test/berlin/berlin_000320_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000320_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000321_000019_gtFine_color.png b/test/berlin/berlin_000321_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000321_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000321_000019_gtFine_instanceIds.png b/test/berlin/berlin_000321_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000321_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000322_000019_gtFine_color.png b/test/berlin/berlin_000322_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000322_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000326_000019_gtFine_instanceIds.png b/test/berlin/berlin_000326_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000326_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000329_000019_gtFine_instanceIds.png b/test/berlin/berlin_000329_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000329_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000330_000019_gtFine_instanceIds.png b/test/berlin/berlin_000330_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000330_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000331_000019_gtFine_color.png b/test/berlin/berlin_000331_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000331_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000331_000019_gtFine_instanceIds.png b/test/berlin/berlin_000331_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000331_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000331_000019_gtFine_labelIds.png b/test/berlin/berlin_000331_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000331_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000332_000019_gtFine_color.png b/test/berlin/berlin_000332_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000332_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000336_000019_gtFine_color.png b/test/berlin/berlin_000336_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000336_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000336_000019_gtFine_labelIds.png b/test/berlin/berlin_000336_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000336_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000337_000019_gtFine_instanceIds.png b/test/berlin/berlin_000337_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000337_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000337_000019_gtFine_labelIds.png b/test/berlin/berlin_000337_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000337_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000338_000019_gtFine_instanceIds.png b/test/berlin/berlin_000338_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000338_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000339_000019_gtFine_color.png b/test/berlin/berlin_000339_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000339_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000340_000019_gtFine_color.png b/test/berlin/berlin_000340_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000340_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000342_000019_gtFine_labelIds.png b/test/berlin/berlin_000342_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000342_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000343_000019_gtFine_color.png b/test/berlin/berlin_000343_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000343_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000344_000019_gtFine_labelIds.png b/test/berlin/berlin_000344_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000344_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000345_000019_gtFine_labelIds.png b/test/berlin/berlin_000345_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000345_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000346_000019_gtFine_instanceIds.png b/test/berlin/berlin_000346_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000346_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000347_000019_gtFine_color.png b/test/berlin/berlin_000347_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000347_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000348_000019_gtFine_color.png b/test/berlin/berlin_000348_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000348_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000348_000019_gtFine_labelIds.png b/test/berlin/berlin_000348_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000348_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000349_000019_gtFine_instanceIds.png b/test/berlin/berlin_000349_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000349_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000349_000019_gtFine_labelIds.png b/test/berlin/berlin_000349_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000349_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000350_000019_gtFine_color.png b/test/berlin/berlin_000350_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000350_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000350_000019_gtFine_instanceIds.png b/test/berlin/berlin_000350_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000350_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000351_000019_gtFine_instanceIds.png b/test/berlin/berlin_000351_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000351_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000352_000019_gtFine_labelIds.png b/test/berlin/berlin_000352_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000352_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000353_000019_gtFine_labelIds.png b/test/berlin/berlin_000353_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000353_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000354_000019_gtFine_labelIds.png b/test/berlin/berlin_000354_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000354_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000357_000019_gtFine_instanceIds.png b/test/berlin/berlin_000357_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000357_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000358_000019_gtFine_instanceIds.png b/test/berlin/berlin_000358_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000358_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000358_000019_gtFine_labelIds.png b/test/berlin/berlin_000358_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000358_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000361_000019_gtFine_color.png b/test/berlin/berlin_000361_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000361_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000361_000019_gtFine_labelIds.png b/test/berlin/berlin_000361_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000361_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000362_000019_gtFine_color.png b/test/berlin/berlin_000362_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000362_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000363_000019_gtFine_instanceIds.png b/test/berlin/berlin_000363_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000363_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000364_000019_gtFine_instanceIds.png b/test/berlin/berlin_000364_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000364_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000365_000019_gtFine_instanceIds.png b/test/berlin/berlin_000365_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000365_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000366_000019_gtFine_labelIds.png b/test/berlin/berlin_000366_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000366_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000367_000019_gtFine_labelIds.png b/test/berlin/berlin_000367_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000367_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000370_000019_gtFine_labelIds.png b/test/berlin/berlin_000370_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000370_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000371_000019_gtFine_color.png b/test/berlin/berlin_000371_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000371_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000371_000019_gtFine_labelIds.png b/test/berlin/berlin_000371_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000371_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000372_000019_gtFine_color.png b/test/berlin/berlin_000372_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000372_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000372_000019_gtFine_instanceIds.png b/test/berlin/berlin_000372_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000372_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000374_000019_gtFine_instanceIds.png b/test/berlin/berlin_000374_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000374_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000375_000019_gtFine_instanceIds.png b/test/berlin/berlin_000375_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000375_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000376_000019_gtFine_color.png b/test/berlin/berlin_000376_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000376_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000377_000019_gtFine_labelIds.png b/test/berlin/berlin_000377_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000377_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000379_000019_gtFine_color.png b/test/berlin/berlin_000379_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000379_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000380_000019_gtFine_instanceIds.png b/test/berlin/berlin_000380_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000380_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000380_000019_gtFine_labelIds.png b/test/berlin/berlin_000380_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000380_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000381_000019_gtFine_instanceIds.png b/test/berlin/berlin_000381_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000381_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000383_000019_gtFine_color.png b/test/berlin/berlin_000383_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000383_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000386_000019_gtFine_instanceIds.png b/test/berlin/berlin_000386_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000386_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000386_000019_gtFine_labelIds.png b/test/berlin/berlin_000386_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000386_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000387_000019_gtFine_labelIds.png b/test/berlin/berlin_000387_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000387_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000388_000019_gtFine_color.png b/test/berlin/berlin_000388_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000388_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000389_000019_gtFine_instanceIds.png b/test/berlin/berlin_000389_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000389_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000390_000019_gtFine_color.png b/test/berlin/berlin_000390_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000390_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000390_000019_gtFine_labelIds.png b/test/berlin/berlin_000390_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000390_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000391_000019_gtFine_instanceIds.png b/test/berlin/berlin_000391_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000391_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000391_000019_gtFine_labelIds.png b/test/berlin/berlin_000391_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000391_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000393_000019_gtFine_color.png b/test/berlin/berlin_000393_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000393_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000394_000019_gtFine_color.png b/test/berlin/berlin_000394_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000394_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000396_000019_gtFine_labelIds.png b/test/berlin/berlin_000396_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000396_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000397_000019_gtFine_instanceIds.png b/test/berlin/berlin_000397_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000397_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000398_000019_gtFine_instanceIds.png b/test/berlin/berlin_000398_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000398_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000400_000019_gtFine_labelIds.png b/test/berlin/berlin_000400_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000400_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000401_000019_gtFine_instanceIds.png b/test/berlin/berlin_000401_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000401_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000406_000019_gtFine_instanceIds.png b/test/berlin/berlin_000406_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000406_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000406_000019_gtFine_labelIds.png b/test/berlin/berlin_000406_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000406_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000407_000019_gtFine_color.png b/test/berlin/berlin_000407_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000407_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000407_000019_gtFine_instanceIds.png b/test/berlin/berlin_000407_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000407_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000407_000019_gtFine_labelIds.png b/test/berlin/berlin_000407_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000407_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000408_000019_gtFine_color.png b/test/berlin/berlin_000408_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000408_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000410_000019_gtFine_color.png b/test/berlin/berlin_000410_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000410_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000410_000019_gtFine_instanceIds.png b/test/berlin/berlin_000410_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000410_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000410_000019_gtFine_labelIds.png b/test/berlin/berlin_000410_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000410_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000411_000019_gtFine_labelIds.png b/test/berlin/berlin_000411_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000411_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000414_000019_gtFine_color.png b/test/berlin/berlin_000414_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000414_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000416_000019_gtFine_labelIds.png b/test/berlin/berlin_000416_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000416_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000417_000019_gtFine_color.png b/test/berlin/berlin_000417_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000417_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000418_000019_gtFine_color.png b/test/berlin/berlin_000418_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000418_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000418_000019_gtFine_instanceIds.png b/test/berlin/berlin_000418_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000418_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000419_000019_gtFine_instanceIds.png b/test/berlin/berlin_000419_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000419_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000421_000019_gtFine_color.png b/test/berlin/berlin_000421_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000421_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000422_000019_gtFine_instanceIds.png b/test/berlin/berlin_000422_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000422_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000423_000019_gtFine_instanceIds.png b/test/berlin/berlin_000423_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000423_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000423_000019_gtFine_labelIds.png b/test/berlin/berlin_000423_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000423_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000424_000019_gtFine_instanceIds.png b/test/berlin/berlin_000424_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000424_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000424_000019_gtFine_labelIds.png b/test/berlin/berlin_000424_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000424_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000425_000019_gtFine_color.png b/test/berlin/berlin_000425_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000425_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000425_000019_gtFine_labelIds.png b/test/berlin/berlin_000425_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000425_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000426_000019_gtFine_color.png b/test/berlin/berlin_000426_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000426_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000428_000019_gtFine_labelIds.png b/test/berlin/berlin_000428_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000428_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000429_000019_gtFine_color.png b/test/berlin/berlin_000429_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000429_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000429_000019_gtFine_labelIds.png b/test/berlin/berlin_000429_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000429_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000432_000019_gtFine_labelIds.png b/test/berlin/berlin_000432_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000432_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000433_000019_gtFine_instanceIds.png b/test/berlin/berlin_000433_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000433_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000433_000019_gtFine_labelIds.png b/test/berlin/berlin_000433_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000433_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000435_000019_gtFine_color.png b/test/berlin/berlin_000435_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000435_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000435_000019_gtFine_instanceIds.png b/test/berlin/berlin_000435_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000435_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000435_000019_gtFine_labelIds.png b/test/berlin/berlin_000435_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000435_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000436_000019_gtFine_color.png b/test/berlin/berlin_000436_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000436_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000439_000019_gtFine_color.png b/test/berlin/berlin_000439_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000439_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000439_000019_gtFine_labelIds.png b/test/berlin/berlin_000439_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000439_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000441_000019_gtFine_labelIds.png b/test/berlin/berlin_000441_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000441_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000442_000019_gtFine_instanceIds.png b/test/berlin/berlin_000442_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000442_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000443_000019_gtFine_color.png b/test/berlin/berlin_000443_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000443_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000443_000019_gtFine_instanceIds.png b/test/berlin/berlin_000443_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000443_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000444_000019_gtFine_color.png b/test/berlin/berlin_000444_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000444_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000444_000019_gtFine_instanceIds.png b/test/berlin/berlin_000444_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000444_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000447_000019_gtFine_color.png b/test/berlin/berlin_000447_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000447_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000448_000019_gtFine_color.png b/test/berlin/berlin_000448_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000448_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000450_000019_gtFine_color.png b/test/berlin/berlin_000450_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000450_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000450_000019_gtFine_labelIds.png b/test/berlin/berlin_000450_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000450_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000454_000019_gtFine_color.png b/test/berlin/berlin_000454_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000454_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000455_000019_gtFine_instanceIds.png b/test/berlin/berlin_000455_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000455_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000456_000019_gtFine_labelIds.png b/test/berlin/berlin_000456_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000456_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000457_000019_gtFine_color.png b/test/berlin/berlin_000457_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000457_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000457_000019_gtFine_labelIds.png b/test/berlin/berlin_000457_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000457_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000458_000019_gtFine_color.png b/test/berlin/berlin_000458_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000458_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000461_000019_gtFine_color.png b/test/berlin/berlin_000461_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000461_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000461_000019_gtFine_instanceIds.png b/test/berlin/berlin_000461_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000461_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000462_000019_gtFine_labelIds.png b/test/berlin/berlin_000462_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000462_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000463_000019_gtFine_labelIds.png b/test/berlin/berlin_000463_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000463_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000465_000019_gtFine_color.png b/test/berlin/berlin_000465_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000465_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000465_000019_gtFine_labelIds.png b/test/berlin/berlin_000465_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000465_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000466_000019_gtFine_color.png b/test/berlin/berlin_000466_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000466_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000466_000019_gtFine_instanceIds.png b/test/berlin/berlin_000466_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000466_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000467_000019_gtFine_instanceIds.png b/test/berlin/berlin_000467_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000467_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000468_000019_gtFine_instanceIds.png b/test/berlin/berlin_000468_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000468_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000469_000019_gtFine_color.png b/test/berlin/berlin_000469_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000469_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000469_000019_gtFine_instanceIds.png b/test/berlin/berlin_000469_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000469_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000469_000019_gtFine_labelIds.png b/test/berlin/berlin_000469_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000469_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000470_000019_gtFine_instanceIds.png b/test/berlin/berlin_000470_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000470_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000474_000019_gtFine_labelIds.png b/test/berlin/berlin_000474_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000474_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000476_000019_gtFine_color.png b/test/berlin/berlin_000476_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000476_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000476_000019_gtFine_instanceIds.png b/test/berlin/berlin_000476_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000476_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000478_000019_gtFine_instanceIds.png b/test/berlin/berlin_000478_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000478_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000478_000019_gtFine_labelIds.png b/test/berlin/berlin_000478_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000478_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000479_000019_gtFine_color.png b/test/berlin/berlin_000479_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000479_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000479_000019_gtFine_instanceIds.png b/test/berlin/berlin_000479_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000479_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000483_000019_gtFine_color.png b/test/berlin/berlin_000483_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000483_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000483_000019_gtFine_labelIds.png b/test/berlin/berlin_000483_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000483_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000484_000019_gtFine_color.png b/test/berlin/berlin_000484_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000484_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000484_000019_gtFine_instanceIds.png b/test/berlin/berlin_000484_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000484_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000487_000019_gtFine_color.png b/test/berlin/berlin_000487_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000487_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000488_000019_gtFine_color.png b/test/berlin/berlin_000488_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000488_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000492_000019_gtFine_instanceIds.png b/test/berlin/berlin_000492_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000492_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000492_000019_gtFine_labelIds.png b/test/berlin/berlin_000492_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000492_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000493_000019_gtFine_instanceIds.png b/test/berlin/berlin_000493_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000493_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000494_000019_gtFine_color.png b/test/berlin/berlin_000494_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000494_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000494_000019_gtFine_labelIds.png b/test/berlin/berlin_000494_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000494_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000495_000019_gtFine_instanceIds.png b/test/berlin/berlin_000495_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000495_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000495_000019_gtFine_labelIds.png b/test/berlin/berlin_000495_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000495_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000497_000019_gtFine_color.png b/test/berlin/berlin_000497_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000497_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000498_000019_gtFine_labelIds.png b/test/berlin/berlin_000498_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000498_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000499_000019_gtFine_labelIds.png b/test/berlin/berlin_000499_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000499_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000501_000019_gtFine_color.png b/test/berlin/berlin_000501_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000501_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000502_000019_gtFine_color.png b/test/berlin/berlin_000502_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000502_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000502_000019_gtFine_instanceIds.png b/test/berlin/berlin_000502_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000502_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000502_000019_gtFine_labelIds.png b/test/berlin/berlin_000502_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000502_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000503_000019_gtFine_instanceIds.png b/test/berlin/berlin_000503_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000503_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000505_000019_gtFine_color.png b/test/berlin/berlin_000505_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000505_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000505_000019_gtFine_instanceIds.png b/test/berlin/berlin_000505_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000505_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000512_000019_gtFine_color.png b/test/berlin/berlin_000512_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000512_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000512_000019_gtFine_instanceIds.png b/test/berlin/berlin_000512_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000512_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000513_000019_gtFine_instanceIds.png b/test/berlin/berlin_000513_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000513_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000513_000019_gtFine_labelIds.png b/test/berlin/berlin_000513_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000513_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000514_000019_gtFine_instanceIds.png b/test/berlin/berlin_000514_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000514_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000514_000019_gtFine_labelIds.png b/test/berlin/berlin_000514_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000514_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000515_000019_gtFine_labelIds.png b/test/berlin/berlin_000515_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000515_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000518_000019_gtFine_labelIds.png b/test/berlin/berlin_000518_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000518_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000519_000019_gtFine_labelIds.png b/test/berlin/berlin_000519_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000519_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000520_000019_gtFine_color.png b/test/berlin/berlin_000520_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000520_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000520_000019_gtFine_instanceIds.png b/test/berlin/berlin_000520_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000520_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000520_000019_gtFine_labelIds.png b/test/berlin/berlin_000520_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000520_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000521_000019_gtFine_labelIds.png b/test/berlin/berlin_000521_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000521_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000523_000019_gtFine_color.png b/test/berlin/berlin_000523_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000523_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000526_000019_gtFine_labelIds.png b/test/berlin/berlin_000526_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000526_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000527_000019_gtFine_color.png b/test/berlin/berlin_000527_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000527_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000528_000019_gtFine_instanceIds.png b/test/berlin/berlin_000528_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000528_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000529_000019_gtFine_instanceIds.png b/test/berlin/berlin_000529_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000529_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000530_000019_gtFine_color.png b/test/berlin/berlin_000530_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000530_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000531_000019_gtFine_instanceIds.png b/test/berlin/berlin_000531_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000531_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000533_000019_gtFine_color.png b/test/berlin/berlin_000533_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000533_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000534_000019_gtFine_color.png b/test/berlin/berlin_000534_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000534_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000536_000019_gtFine_instanceIds.png b/test/berlin/berlin_000536_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000536_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000537_000019_gtFine_instanceIds.png b/test/berlin/berlin_000537_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000537_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000537_000019_gtFine_labelIds.png b/test/berlin/berlin_000537_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000537_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/berlin/berlin_000540_000019_gtFine_instanceIds.png b/test/berlin/berlin_000540_000019_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..03af864bda9c52c758b48b912a94bdb3c5a8dc70
--- /dev/null
+++ b/test/berlin/berlin_000540_000019_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46da601992bb3c0698a155a9b9e1e5b3eddc814b3667cece5ebd3f6bf4d31dff
+size 7419
diff --git a/test/berlin/berlin_000541_000019_gtFine_color.png b/test/berlin/berlin_000541_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000541_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000542_000019_gtFine_color.png b/test/berlin/berlin_000542_000019_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/berlin/berlin_000542_000019_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/berlin/berlin_000543_000019_gtFine_labelIds.png b/test/berlin/berlin_000543_000019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..3768c80aaaaf340ee6d2f80deeedb99c2d21371c
--- /dev/null
+++ b/test/berlin/berlin_000543_000019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:29a7603e1e9fd8c2102e182f0b0269a24c0cc707917e3fec6175ab91a69efaee
+size 5213
diff --git a/test/mainz/mainz_000000_000093_gtFine_color.png b/test/mainz/mainz_000000_000093_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000000_000093_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000000_000093_gtFine_instanceIds.png b/test/mainz/mainz_000000_000093_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_000093_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_000093_gtFine_polygons.json b/test/mainz/mainz_000000_000093_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_000093_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_000293_gtFine_polygons.json b/test/mainz/mainz_000000_000293_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_000293_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_001003_gtFine_labelIds.png b/test/mainz/mainz_000000_001003_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000000_001003_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000000_001003_gtFine_polygons.json b/test/mainz/mainz_000000_001003_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_001003_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_001068_gtFine_polygons.json b/test/mainz/mainz_000000_001068_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_001068_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_001265_gtFine_instanceIds.png b/test/mainz/mainz_000000_001265_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_001265_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_001410_gtFine_polygons.json b/test/mainz/mainz_000000_001410_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_001410_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_001601_gtFine_color.png b/test/mainz/mainz_000000_001601_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000000_001601_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000000_001601_gtFine_labelIds.png b/test/mainz/mainz_000000_001601_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000000_001601_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000000_001857_gtFine_labelIds.png b/test/mainz/mainz_000000_001857_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000000_001857_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000000_001857_gtFine_polygons.json b/test/mainz/mainz_000000_001857_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_001857_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_002353_gtFine_polygons.json b/test/mainz/mainz_000000_002353_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_002353_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_003049_gtFine_labelIds.png b/test/mainz/mainz_000000_003049_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000000_003049_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000000_003049_gtFine_polygons.json b/test/mainz/mainz_000000_003049_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_003049_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_003250_gtFine_labelIds.png b/test/mainz/mainz_000000_003250_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000000_003250_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000000_003250_gtFine_polygons.json b/test/mainz/mainz_000000_003250_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_003250_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_003506_gtFine_instanceIds.png b/test/mainz/mainz_000000_003506_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_003506_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_003506_gtFine_polygons.json b/test/mainz/mainz_000000_003506_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_003506_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_003619_gtFine_instanceIds.png b/test/mainz/mainz_000000_003619_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_003619_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_003619_gtFine_polygons.json b/test/mainz/mainz_000000_003619_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_003619_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_004000_gtFine_color.png b/test/mainz/mainz_000000_004000_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000000_004000_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000000_004000_gtFine_instanceIds.png b/test/mainz/mainz_000000_004000_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_004000_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_004000_gtFine_polygons.json b/test/mainz/mainz_000000_004000_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_004000_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_004237_gtFine_polygons.json b/test/mainz/mainz_000000_004237_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_004237_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_004542_gtFine_instanceIds.png b/test/mainz/mainz_000000_004542_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_004542_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_004740_gtFine_polygons.json b/test/mainz/mainz_000000_004740_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_004740_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_005403_gtFine_color.png b/test/mainz/mainz_000000_005403_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000000_005403_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000000_005403_gtFine_labelIds.png b/test/mainz/mainz_000000_005403_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000000_005403_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000000_005403_gtFine_polygons.json b/test/mainz/mainz_000000_005403_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_005403_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_005549_gtFine_polygons.json b/test/mainz/mainz_000000_005549_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_005549_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_005817_gtFine_instanceIds.png b/test/mainz/mainz_000000_005817_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_005817_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_005817_gtFine_polygons.json b/test/mainz/mainz_000000_005817_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_005817_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_006141_gtFine_instanceIds.png b/test/mainz/mainz_000000_006141_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_006141_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_006141_gtFine_polygons.json b/test/mainz/mainz_000000_006141_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_006141_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_006263_gtFine_color.png b/test/mainz/mainz_000000_006263_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000000_006263_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000000_006263_gtFine_polygons.json b/test/mainz/mainz_000000_006263_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_006263_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_006368_gtFine_instanceIds.png b/test/mainz/mainz_000000_006368_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_006368_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_006368_gtFine_polygons.json b/test/mainz/mainz_000000_006368_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_006368_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_006649_gtFine_labelIds.png b/test/mainz/mainz_000000_006649_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000000_006649_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000000_006649_gtFine_polygons.json b/test/mainz/mainz_000000_006649_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_006649_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_007415_gtFine_polygons.json b/test/mainz/mainz_000000_007415_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_007415_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_007813_gtFine_labelIds.png b/test/mainz/mainz_000000_007813_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000000_007813_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000000_007813_gtFine_polygons.json b/test/mainz/mainz_000000_007813_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_007813_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_008001_gtFine_polygons.json b/test/mainz/mainz_000000_008001_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_008001_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_008165_gtFine_labelIds.png b/test/mainz/mainz_000000_008165_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000000_008165_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000000_008165_gtFine_polygons.json b/test/mainz/mainz_000000_008165_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_008165_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_008509_gtFine_polygons.json b/test/mainz/mainz_000000_008509_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_008509_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_008645_gtFine_labelIds.png b/test/mainz/mainz_000000_008645_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000000_008645_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000000_008645_gtFine_polygons.json b/test/mainz/mainz_000000_008645_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_008645_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_009751_gtFine_polygons.json b/test/mainz/mainz_000000_009751_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_009751_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_009985_gtFine_color.png b/test/mainz/mainz_000000_009985_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000000_009985_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000000_009985_gtFine_instanceIds.png b/test/mainz/mainz_000000_009985_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_009985_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_009985_gtFine_polygons.json b/test/mainz/mainz_000000_009985_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_009985_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_010417_gtFine_color.png b/test/mainz/mainz_000000_010417_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000000_010417_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000000_010417_gtFine_polygons.json b/test/mainz/mainz_000000_010417_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_010417_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_010550_gtFine_instanceIds.png b/test/mainz/mainz_000000_010550_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_010550_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_010550_gtFine_labelIds.png b/test/mainz/mainz_000000_010550_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000000_010550_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000000_010550_gtFine_polygons.json b/test/mainz/mainz_000000_010550_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_010550_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_011879_gtFine_instanceIds.png b/test/mainz/mainz_000000_011879_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_011879_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_011879_gtFine_polygons.json b/test/mainz/mainz_000000_011879_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_011879_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_011965_gtFine_polygons.json b/test/mainz/mainz_000000_011965_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_011965_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_012737_gtFine_color.png b/test/mainz/mainz_000000_012737_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000000_012737_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000000_012737_gtFine_instanceIds.png b/test/mainz/mainz_000000_012737_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_012737_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_013095_gtFine_polygons.json b/test/mainz/mainz_000000_013095_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_013095_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_013437_gtFine_instanceIds.png b/test/mainz/mainz_000000_013437_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_013437_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_013437_gtFine_labelIds.png b/test/mainz/mainz_000000_013437_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000000_013437_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000000_013437_gtFine_polygons.json b/test/mainz/mainz_000000_013437_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_013437_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_013671_gtFine_color.png b/test/mainz/mainz_000000_013671_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000000_013671_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000000_013671_gtFine_polygons.json b/test/mainz/mainz_000000_013671_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_013671_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_013960_gtFine_polygons.json b/test/mainz/mainz_000000_013960_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_013960_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_014193_gtFine_polygons.json b/test/mainz/mainz_000000_014193_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_014193_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_014742_gtFine_color.png b/test/mainz/mainz_000000_014742_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000000_014742_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000000_014742_gtFine_labelIds.png b/test/mainz/mainz_000000_014742_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000000_014742_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000000_015052_gtFine_polygons.json b/test/mainz/mainz_000000_015052_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_015052_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_015170_gtFine_polygons.json b/test/mainz/mainz_000000_015170_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_015170_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_015760_gtFine_polygons.json b/test/mainz/mainz_000000_015760_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_015760_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_016083_gtFine_instanceIds.png b/test/mainz/mainz_000000_016083_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_016083_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_016083_gtFine_labelIds.png b/test/mainz/mainz_000000_016083_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000000_016083_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000000_016083_gtFine_polygons.json b/test/mainz/mainz_000000_016083_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_016083_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_016281_gtFine_color.png b/test/mainz/mainz_000000_016281_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000000_016281_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000000_016612_gtFine_instanceIds.png b/test/mainz/mainz_000000_016612_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_016612_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_016612_gtFine_polygons.json b/test/mainz/mainz_000000_016612_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_016612_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_016651_gtFine_color.png b/test/mainz/mainz_000000_016651_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000000_016651_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000000_016651_gtFine_instanceIds.png b/test/mainz/mainz_000000_016651_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_016651_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_016651_gtFine_polygons.json b/test/mainz/mainz_000000_016651_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_016651_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_016915_gtFine_polygons.json b/test/mainz/mainz_000000_016915_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_016915_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_017927_gtFine_instanceIds.png b/test/mainz/mainz_000000_017927_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_017927_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_018249_gtFine_polygons.json b/test/mainz/mainz_000000_018249_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_018249_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_018883_gtFine_color.png b/test/mainz/mainz_000000_018883_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000000_018883_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000000_018883_gtFine_polygons.json b/test/mainz/mainz_000000_018883_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_018883_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_019043_gtFine_instanceIds.png b/test/mainz/mainz_000000_019043_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_019043_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_019043_gtFine_polygons.json b/test/mainz/mainz_000000_019043_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_019043_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_019227_gtFine_instanceIds.png b/test/mainz/mainz_000000_019227_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_019227_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_019227_gtFine_labelIds.png b/test/mainz/mainz_000000_019227_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000000_019227_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000000_019227_gtFine_polygons.json b/test/mainz/mainz_000000_019227_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_019227_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_019439_gtFine_color.png b/test/mainz/mainz_000000_019439_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000000_019439_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000000_019439_gtFine_instanceIds.png b/test/mainz/mainz_000000_019439_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_019439_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_019439_gtFine_polygons.json b/test/mainz/mainz_000000_019439_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_019439_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_019686_gtFine_labelIds.png b/test/mainz/mainz_000000_019686_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000000_019686_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000000_019686_gtFine_polygons.json b/test/mainz/mainz_000000_019686_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_019686_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_019847_gtFine_polygons.json b/test/mainz/mainz_000000_019847_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_019847_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_020139_gtFine_instanceIds.png b/test/mainz/mainz_000000_020139_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000000_020139_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000000_020139_gtFine_polygons.json b/test/mainz/mainz_000000_020139_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_020139_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_020415_gtFine_polygons.json b/test/mainz/mainz_000000_020415_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_020415_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_021457_gtFine_polygons.json b/test/mainz/mainz_000000_021457_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_021457_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_021524_gtFine_polygons.json b/test/mainz/mainz_000000_021524_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_021524_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_021735_gtFine_color.png b/test/mainz/mainz_000000_021735_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000000_021735_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000000_021735_gtFine_polygons.json b/test/mainz/mainz_000000_021735_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_021735_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_021833_gtFine_polygons.json b/test/mainz/mainz_000000_021833_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_021833_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_022091_gtFine_labelIds.png b/test/mainz/mainz_000000_022091_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000000_022091_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000000_022091_gtFine_polygons.json b/test/mainz/mainz_000000_022091_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_022091_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000000_022417_gtFine_polygons.json b/test/mainz/mainz_000000_022417_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000000_022417_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_000120_gtFine_instanceIds.png b/test/mainz/mainz_000001_000120_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_000120_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_000120_gtFine_polygons.json b/test/mainz/mainz_000001_000120_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_000120_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_000428_gtFine_polygons.json b/test/mainz/mainz_000001_000428_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_000428_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_001509_gtFine_color.png b/test/mainz/mainz_000001_001509_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_001509_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_001509_gtFine_polygons.json b/test/mainz/mainz_000001_001509_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_001509_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_002033_gtFine_color.png b/test/mainz/mainz_000001_002033_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_002033_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_002033_gtFine_polygons.json b/test/mainz/mainz_000001_002033_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_002033_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_002543_gtFine_polygons.json b/test/mainz/mainz_000001_002543_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_002543_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_002884_gtFine_polygons.json b/test/mainz/mainz_000001_002884_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_002884_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_003012_gtFine_color.png b/test/mainz/mainz_000001_003012_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_003012_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_003012_gtFine_labelIds.png b/test/mainz/mainz_000001_003012_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_003012_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_003012_gtFine_polygons.json b/test/mainz/mainz_000001_003012_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_003012_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_003624_gtFine_instanceIds.png b/test/mainz/mainz_000001_003624_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_003624_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_003624_gtFine_polygons.json b/test/mainz/mainz_000001_003624_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_003624_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_003702_gtFine_polygons.json b/test/mainz/mainz_000001_003702_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_003702_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_003907_gtFine_instanceIds.png b/test/mainz/mainz_000001_003907_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_003907_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_004132_gtFine_instanceIds.png b/test/mainz/mainz_000001_004132_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_004132_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_004132_gtFine_labelIds.png b/test/mainz/mainz_000001_004132_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_004132_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_004132_gtFine_polygons.json b/test/mainz/mainz_000001_004132_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_004132_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_004219_gtFine_instanceIds.png b/test/mainz/mainz_000001_004219_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_004219_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_004219_gtFine_labelIds.png b/test/mainz/mainz_000001_004219_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_004219_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_004219_gtFine_polygons.json b/test/mainz/mainz_000001_004219_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_004219_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_004823_gtFine_color.png b/test/mainz/mainz_000001_004823_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_004823_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_004823_gtFine_polygons.json b/test/mainz/mainz_000001_004823_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_004823_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_005016_gtFine_color.png b/test/mainz/mainz_000001_005016_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_005016_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_005016_gtFine_labelIds.png b/test/mainz/mainz_000001_005016_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_005016_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_005163_gtFine_instanceIds.png b/test/mainz/mainz_000001_005163_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_005163_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_005163_gtFine_polygons.json b/test/mainz/mainz_000001_005163_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_005163_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_005366_gtFine_polygons.json b/test/mainz/mainz_000001_005366_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_005366_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_005665_gtFine_polygons.json b/test/mainz/mainz_000001_005665_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_005665_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_005815_gtFine_polygons.json b/test/mainz/mainz_000001_005815_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_005815_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_005911_gtFine_color.png b/test/mainz/mainz_000001_005911_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_005911_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_005911_gtFine_instanceIds.png b/test/mainz/mainz_000001_005911_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_005911_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_005911_gtFine_polygons.json b/test/mainz/mainz_000001_005911_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_005911_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_006194_gtFine_polygons.json b/test/mainz/mainz_000001_006194_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_006194_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_006768_gtFine_instanceIds.png b/test/mainz/mainz_000001_006768_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_006768_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_006768_gtFine_polygons.json b/test/mainz/mainz_000001_006768_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_006768_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_007171_gtFine_labelIds.png b/test/mainz/mainz_000001_007171_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_007171_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_007171_gtFine_polygons.json b/test/mainz/mainz_000001_007171_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_007171_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_007460_gtFine_instanceIds.png b/test/mainz/mainz_000001_007460_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_007460_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_007460_gtFine_polygons.json b/test/mainz/mainz_000001_007460_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_007460_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_007595_gtFine_color.png b/test/mainz/mainz_000001_007595_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_007595_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_007595_gtFine_polygons.json b/test/mainz/mainz_000001_007595_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_007595_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_007956_gtFine_instanceIds.png b/test/mainz/mainz_000001_007956_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_007956_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_007956_gtFine_polygons.json b/test/mainz/mainz_000001_007956_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_007956_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_008056_gtFine_color.png b/test/mainz/mainz_000001_008056_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_008056_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_008056_gtFine_labelIds.png b/test/mainz/mainz_000001_008056_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_008056_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_008056_gtFine_polygons.json b/test/mainz/mainz_000001_008056_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_008056_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_008264_gtFine_polygons.json b/test/mainz/mainz_000001_008264_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_008264_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_008540_gtFine_polygons.json b/test/mainz/mainz_000001_008540_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_008540_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_008638_gtFine_color.png b/test/mainz/mainz_000001_008638_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_008638_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_008638_gtFine_polygons.json b/test/mainz/mainz_000001_008638_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_008638_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_008771_gtFine_labelIds.png b/test/mainz/mainz_000001_008771_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_008771_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_009328_gtFine_color.png b/test/mainz/mainz_000001_009328_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_009328_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_009328_gtFine_instanceIds.png b/test/mainz/mainz_000001_009328_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_009328_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_009328_gtFine_labelIds.png b/test/mainz/mainz_000001_009328_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_009328_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_009328_gtFine_polygons.json b/test/mainz/mainz_000001_009328_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_009328_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_009811_gtFine_labelIds.png b/test/mainz/mainz_000001_009811_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_009811_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_009811_gtFine_polygons.json b/test/mainz/mainz_000001_009811_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_009811_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_009867_gtFine_color.png b/test/mainz/mainz_000001_009867_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_009867_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_009867_gtFine_polygons.json b/test/mainz/mainz_000001_009867_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_009867_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_009996_gtFine_color.png b/test/mainz/mainz_000001_009996_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_009996_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_009996_gtFine_labelIds.png b/test/mainz/mainz_000001_009996_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_009996_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_009996_gtFine_polygons.json b/test/mainz/mainz_000001_009996_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_009996_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_010853_gtFine_instanceIds.png b/test/mainz/mainz_000001_010853_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_010853_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_010853_gtFine_polygons.json b/test/mainz/mainz_000001_010853_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_010853_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_011333_gtFine_polygons.json b/test/mainz/mainz_000001_011333_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_011333_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_011736_gtFine_polygons.json b/test/mainz/mainz_000001_011736_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_011736_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_012186_gtFine_polygons.json b/test/mainz/mainz_000001_012186_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_012186_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_012470_gtFine_labelIds.png b/test/mainz/mainz_000001_012470_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_012470_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_012470_gtFine_polygons.json b/test/mainz/mainz_000001_012470_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_012470_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_012541_gtFine_labelIds.png b/test/mainz/mainz_000001_012541_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_012541_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_012644_gtFine_polygons.json b/test/mainz/mainz_000001_012644_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_012644_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_012950_gtFine_color.png b/test/mainz/mainz_000001_012950_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_012950_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_012950_gtFine_instanceIds.png b/test/mainz/mainz_000001_012950_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_012950_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_012950_gtFine_labelIds.png b/test/mainz/mainz_000001_012950_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_012950_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_012950_gtFine_polygons.json b/test/mainz/mainz_000001_012950_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_012950_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_013313_gtFine_color.png b/test/mainz/mainz_000001_013313_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_013313_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_013313_gtFine_labelIds.png b/test/mainz/mainz_000001_013313_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_013313_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_013313_gtFine_polygons.json b/test/mainz/mainz_000001_013313_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_013313_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_014073_gtFine_color.png b/test/mainz/mainz_000001_014073_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_014073_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_014073_gtFine_polygons.json b/test/mainz/mainz_000001_014073_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_014073_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_014469_gtFine_labelIds.png b/test/mainz/mainz_000001_014469_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_014469_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_014626_gtFine_color.png b/test/mainz/mainz_000001_014626_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_014626_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_014626_gtFine_labelIds.png b/test/mainz/mainz_000001_014626_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_014626_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_015117_gtFine_instanceIds.png b/test/mainz/mainz_000001_015117_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_015117_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_015117_gtFine_labelIds.png b/test/mainz/mainz_000001_015117_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_015117_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_015117_gtFine_polygons.json b/test/mainz/mainz_000001_015117_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_015117_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_015235_gtFine_instanceIds.png b/test/mainz/mainz_000001_015235_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_015235_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_015235_gtFine_labelIds.png b/test/mainz/mainz_000001_015235_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_015235_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_015235_gtFine_polygons.json b/test/mainz/mainz_000001_015235_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_015235_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_015508_gtFine_color.png b/test/mainz/mainz_000001_015508_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_015508_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_015508_gtFine_labelIds.png b/test/mainz/mainz_000001_015508_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_015508_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_015508_gtFine_polygons.json b/test/mainz/mainz_000001_015508_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_015508_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_015724_gtFine_color.png b/test/mainz/mainz_000001_015724_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_015724_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_015724_gtFine_polygons.json b/test/mainz/mainz_000001_015724_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_015724_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_016011_gtFine_polygons.json b/test/mainz/mainz_000001_016011_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_016011_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_016391_gtFine_color.png b/test/mainz/mainz_000001_016391_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_016391_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_016391_gtFine_polygons.json b/test/mainz/mainz_000001_016391_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_016391_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_016931_gtFine_instanceIds.png b/test/mainz/mainz_000001_016931_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_016931_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_016931_gtFine_polygons.json b/test/mainz/mainz_000001_016931_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_016931_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_017618_gtFine_color.png b/test/mainz/mainz_000001_017618_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_017618_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_017618_gtFine_polygons.json b/test/mainz/mainz_000001_017618_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_017618_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_017992_gtFine_instanceIds.png b/test/mainz/mainz_000001_017992_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_017992_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_017992_gtFine_polygons.json b/test/mainz/mainz_000001_017992_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_017992_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_018145_gtFine_color.png b/test/mainz/mainz_000001_018145_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_018145_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_018145_gtFine_polygons.json b/test/mainz/mainz_000001_018145_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_018145_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_018329_gtFine_color.png b/test/mainz/mainz_000001_018329_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_018329_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_018329_gtFine_polygons.json b/test/mainz/mainz_000001_018329_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_018329_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_018670_gtFine_polygons.json b/test/mainz/mainz_000001_018670_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_018670_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_018817_gtFine_color.png b/test/mainz/mainz_000001_018817_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_018817_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_018817_gtFine_instanceIds.png b/test/mainz/mainz_000001_018817_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_018817_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_018817_gtFine_polygons.json b/test/mainz/mainz_000001_018817_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_018817_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_019061_gtFine_labelIds.png b/test/mainz/mainz_000001_019061_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_019061_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_019061_gtFine_polygons.json b/test/mainz/mainz_000001_019061_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_019061_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_019286_gtFine_color.png b/test/mainz/mainz_000001_019286_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_019286_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_019286_gtFine_polygons.json b/test/mainz/mainz_000001_019286_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_019286_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_019593_gtFine_polygons.json b/test/mainz/mainz_000001_019593_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_019593_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_020068_gtFine_labelIds.png b/test/mainz/mainz_000001_020068_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_020068_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_020068_gtFine_polygons.json b/test/mainz/mainz_000001_020068_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_020068_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_020484_gtFine_instanceIds.png b/test/mainz/mainz_000001_020484_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_020484_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_020484_gtFine_labelIds.png b/test/mainz/mainz_000001_020484_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_020484_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_020484_gtFine_polygons.json b/test/mainz/mainz_000001_020484_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_020484_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_020829_gtFine_polygons.json b/test/mainz/mainz_000001_020829_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_020829_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_021042_gtFine_polygons.json b/test/mainz/mainz_000001_021042_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_021042_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_021547_gtFine_polygons.json b/test/mainz/mainz_000001_021547_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_021547_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_021892_gtFine_color.png b/test/mainz/mainz_000001_021892_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_021892_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_021892_gtFine_instanceIds.png b/test/mainz/mainz_000001_021892_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_021892_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_021892_gtFine_labelIds.png b/test/mainz/mainz_000001_021892_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_021892_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_021892_gtFine_polygons.json b/test/mainz/mainz_000001_021892_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_021892_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_021946_gtFine_color.png b/test/mainz/mainz_000001_021946_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_021946_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_022125_gtFine_polygons.json b/test/mainz/mainz_000001_022125_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_022125_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_022630_gtFine_labelIds.png b/test/mainz/mainz_000001_022630_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_022630_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_022630_gtFine_polygons.json b/test/mainz/mainz_000001_022630_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_022630_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_023439_gtFine_color.png b/test/mainz/mainz_000001_023439_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_023439_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_023439_gtFine_labelIds.png b/test/mainz/mainz_000001_023439_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_023439_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_023604_gtFine_color.png b/test/mainz/mainz_000001_023604_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_023604_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_023604_gtFine_instanceIds.png b/test/mainz/mainz_000001_023604_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_023604_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_023604_gtFine_polygons.json b/test/mainz/mainz_000001_023604_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_023604_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_024439_gtFine_color.png b/test/mainz/mainz_000001_024439_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_024439_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_024439_gtFine_labelIds.png b/test/mainz/mainz_000001_024439_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_024439_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_024439_gtFine_polygons.json b/test/mainz/mainz_000001_024439_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_024439_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_024489_gtFine_polygons.json b/test/mainz/mainz_000001_024489_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_024489_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_024718_gtFine_color.png b/test/mainz/mainz_000001_024718_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_024718_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_024718_gtFine_labelIds.png b/test/mainz/mainz_000001_024718_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_024718_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_024718_gtFine_polygons.json b/test/mainz/mainz_000001_024718_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_024718_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_025161_gtFine_polygons.json b/test/mainz/mainz_000001_025161_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_025161_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_025390_gtFine_instanceIds.png b/test/mainz/mainz_000001_025390_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_025390_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_025623_gtFine_labelIds.png b/test/mainz/mainz_000001_025623_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_025623_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_026209_gtFine_color.png b/test/mainz/mainz_000001_026209_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_026209_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_026209_gtFine_polygons.json b/test/mainz/mainz_000001_026209_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_026209_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_026837_gtFine_labelIds.png b/test/mainz/mainz_000001_026837_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_026837_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_026837_gtFine_polygons.json b/test/mainz/mainz_000001_026837_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_026837_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_026963_gtFine_color.png b/test/mainz/mainz_000001_026963_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_026963_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_026963_gtFine_instanceIds.png b/test/mainz/mainz_000001_026963_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_026963_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_026963_gtFine_polygons.json b/test/mainz/mainz_000001_026963_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_026963_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_027053_gtFine_polygons.json b/test/mainz/mainz_000001_027053_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_027053_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_027124_gtFine_polygons.json b/test/mainz/mainz_000001_027124_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_027124_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_027675_gtFine_color.png b/test/mainz/mainz_000001_027675_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_027675_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_027675_gtFine_polygons.json b/test/mainz/mainz_000001_027675_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_027675_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_027751_gtFine_instanceIds.png b/test/mainz/mainz_000001_027751_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_027751_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_027751_gtFine_labelIds.png b/test/mainz/mainz_000001_027751_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_027751_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_027751_gtFine_polygons.json b/test/mainz/mainz_000001_027751_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_027751_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_028111_gtFine_polygons.json b/test/mainz/mainz_000001_028111_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_028111_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_028326_gtFine_instanceIds.png b/test/mainz/mainz_000001_028326_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_028326_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_028326_gtFine_polygons.json b/test/mainz/mainz_000001_028326_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_028326_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_028566_gtFine_polygons.json b/test/mainz/mainz_000001_028566_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_028566_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_028847_gtFine_instanceIds.png b/test/mainz/mainz_000001_028847_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_028847_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_028847_gtFine_polygons.json b/test/mainz/mainz_000001_028847_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_028847_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_029293_gtFine_polygons.json b/test/mainz/mainz_000001_029293_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_029293_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_029521_gtFine_instanceIds.png b/test/mainz/mainz_000001_029521_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_029521_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_029521_gtFine_polygons.json b/test/mainz/mainz_000001_029521_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_029521_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_029950_gtFine_instanceIds.png b/test/mainz/mainz_000001_029950_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_029950_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_029950_gtFine_labelIds.png b/test/mainz/mainz_000001_029950_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_029950_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_029950_gtFine_polygons.json b/test/mainz/mainz_000001_029950_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_029950_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_030417_gtFine_color.png b/test/mainz/mainz_000001_030417_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_030417_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_030417_gtFine_polygons.json b/test/mainz/mainz_000001_030417_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_030417_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_030630_gtFine_color.png b/test/mainz/mainz_000001_030630_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_030630_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_030630_gtFine_polygons.json b/test/mainz/mainz_000001_030630_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_030630_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_031697_gtFine_color.png b/test/mainz/mainz_000001_031697_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_031697_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_031697_gtFine_polygons.json b/test/mainz/mainz_000001_031697_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_031697_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_031946_gtFine_polygons.json b/test/mainz/mainz_000001_031946_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_031946_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_032294_gtFine_color.png b/test/mainz/mainz_000001_032294_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_032294_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_032401_gtFine_labelIds.png b/test/mainz/mainz_000001_032401_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_032401_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_032401_gtFine_polygons.json b/test/mainz/mainz_000001_032401_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_032401_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_032691_gtFine_polygons.json b/test/mainz/mainz_000001_032691_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_032691_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_032767_gtFine_color.png b/test/mainz/mainz_000001_032767_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_032767_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_032767_gtFine_instanceIds.png b/test/mainz/mainz_000001_032767_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_032767_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_032767_gtFine_labelIds.png b/test/mainz/mainz_000001_032767_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_032767_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_032767_gtFine_polygons.json b/test/mainz/mainz_000001_032767_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_032767_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_032911_gtFine_polygons.json b/test/mainz/mainz_000001_032911_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_032911_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_033096_gtFine_polygons.json b/test/mainz/mainz_000001_033096_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_033096_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_033329_gtFine_labelIds.png b/test/mainz/mainz_000001_033329_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_033329_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_033329_gtFine_polygons.json b/test/mainz/mainz_000001_033329_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_033329_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_033437_gtFine_color.png b/test/mainz/mainz_000001_033437_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_033437_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_033603_gtFine_polygons.json b/test/mainz/mainz_000001_033603_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_033603_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_033756_gtFine_color.png b/test/mainz/mainz_000001_033756_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_033756_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_034209_gtFine_color.png b/test/mainz/mainz_000001_034209_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_034209_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_034209_gtFine_instanceIds.png b/test/mainz/mainz_000001_034209_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_034209_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_034209_gtFine_polygons.json b/test/mainz/mainz_000001_034209_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_034209_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_034394_gtFine_polygons.json b/test/mainz/mainz_000001_034394_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_034394_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_034508_gtFine_polygons.json b/test/mainz/mainz_000001_034508_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_034508_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_034681_gtFine_instanceIds.png b/test/mainz/mainz_000001_034681_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_034681_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_034681_gtFine_polygons.json b/test/mainz/mainz_000001_034681_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_034681_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_035293_gtFine_instanceIds.png b/test/mainz/mainz_000001_035293_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_035293_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_035293_gtFine_polygons.json b/test/mainz/mainz_000001_035293_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_035293_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_035585_gtFine_instanceIds.png b/test/mainz/mainz_000001_035585_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_035585_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_035585_gtFine_labelIds.png b/test/mainz/mainz_000001_035585_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_035585_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_035585_gtFine_polygons.json b/test/mainz/mainz_000001_035585_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_035585_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_035963_gtFine_polygons.json b/test/mainz/mainz_000001_035963_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_035963_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_036115_gtFine_polygons.json b/test/mainz/mainz_000001_036115_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_036115_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_036240_gtFine_instanceIds.png b/test/mainz/mainz_000001_036240_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_036240_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_036240_gtFine_labelIds.png b/test/mainz/mainz_000001_036240_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_036240_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_036240_gtFine_polygons.json b/test/mainz/mainz_000001_036240_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_036240_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_036412_gtFine_labelIds.png b/test/mainz/mainz_000001_036412_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_036412_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_036412_gtFine_polygons.json b/test/mainz/mainz_000001_036412_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_036412_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_037170_gtFine_polygons.json b/test/mainz/mainz_000001_037170_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_037170_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_037411_gtFine_labelIds.png b/test/mainz/mainz_000001_037411_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_037411_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_037411_gtFine_polygons.json b/test/mainz/mainz_000001_037411_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_037411_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_037532_gtFine_instanceIds.png b/test/mainz/mainz_000001_037532_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_037532_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_037532_gtFine_polygons.json b/test/mainz/mainz_000001_037532_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_037532_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_037736_gtFine_color.png b/test/mainz/mainz_000001_037736_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_037736_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_037736_gtFine_polygons.json b/test/mainz/mainz_000001_037736_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_037736_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_037905_gtFine_instanceIds.png b/test/mainz/mainz_000001_037905_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_037905_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_038026_gtFine_polygons.json b/test/mainz/mainz_000001_038026_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_038026_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_038191_gtFine_color.png b/test/mainz/mainz_000001_038191_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_038191_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_038191_gtFine_polygons.json b/test/mainz/mainz_000001_038191_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_038191_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_038347_gtFine_polygons.json b/test/mainz/mainz_000001_038347_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_038347_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_038768_gtFine_color.png b/test/mainz/mainz_000001_038768_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_038768_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_038768_gtFine_instanceIds.png b/test/mainz/mainz_000001_038768_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_038768_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_038768_gtFine_labelIds.png b/test/mainz/mainz_000001_038768_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_038768_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_038768_gtFine_polygons.json b/test/mainz/mainz_000001_038768_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_038768_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_038955_gtFine_polygons.json b/test/mainz/mainz_000001_038955_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_038955_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_039075_gtFine_color.png b/test/mainz/mainz_000001_039075_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_039075_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_039075_gtFine_polygons.json b/test/mainz/mainz_000001_039075_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_039075_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_039470_gtFine_polygons.json b/test/mainz/mainz_000001_039470_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_039470_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_039943_gtFine_color.png b/test/mainz/mainz_000001_039943_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_039943_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_039943_gtFine_polygons.json b/test/mainz/mainz_000001_039943_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_039943_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_040195_gtFine_labelIds.png b/test/mainz/mainz_000001_040195_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_040195_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_040367_gtFine_color.png b/test/mainz/mainz_000001_040367_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_040367_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_040367_gtFine_instanceIds.png b/test/mainz/mainz_000001_040367_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_040367_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_040839_gtFine_color.png b/test/mainz/mainz_000001_040839_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_040839_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_040839_gtFine_instanceIds.png b/test/mainz/mainz_000001_040839_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_040839_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_040839_gtFine_polygons.json b/test/mainz/mainz_000001_040839_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_040839_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_041172_gtFine_labelIds.png b/test/mainz/mainz_000001_041172_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_041172_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_041172_gtFine_polygons.json b/test/mainz/mainz_000001_041172_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_041172_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_041284_gtFine_instanceIds.png b/test/mainz/mainz_000001_041284_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_041284_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_041284_gtFine_polygons.json b/test/mainz/mainz_000001_041284_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_041284_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_041647_gtFine_color.png b/test/mainz/mainz_000001_041647_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_041647_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_041647_gtFine_instanceIds.png b/test/mainz/mainz_000001_041647_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_041647_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_041647_gtFine_polygons.json b/test/mainz/mainz_000001_041647_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_041647_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_041797_gtFine_labelIds.png b/test/mainz/mainz_000001_041797_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_041797_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_041797_gtFine_polygons.json b/test/mainz/mainz_000001_041797_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_041797_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_041887_gtFine_polygons.json b/test/mainz/mainz_000001_041887_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_041887_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_041923_gtFine_instanceIds.png b/test/mainz/mainz_000001_041923_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_041923_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_041923_gtFine_labelIds.png b/test/mainz/mainz_000001_041923_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_041923_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_041923_gtFine_polygons.json b/test/mainz/mainz_000001_041923_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_041923_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_042121_gtFine_polygons.json b/test/mainz/mainz_000001_042121_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_042121_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_042400_gtFine_color.png b/test/mainz/mainz_000001_042400_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_042400_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_042400_gtFine_instanceIds.png b/test/mainz/mainz_000001_042400_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_042400_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_042400_gtFine_labelIds.png b/test/mainz/mainz_000001_042400_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_042400_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_042851_gtFine_labelIds.png b/test/mainz/mainz_000001_042851_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_042851_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_042851_gtFine_polygons.json b/test/mainz/mainz_000001_042851_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_042851_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_043656_gtFine_color.png b/test/mainz/mainz_000001_043656_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_043656_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_043656_gtFine_polygons.json b/test/mainz/mainz_000001_043656_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_043656_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_044366_gtFine_color.png b/test/mainz/mainz_000001_044366_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_044366_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_044366_gtFine_labelIds.png b/test/mainz/mainz_000001_044366_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_044366_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_044366_gtFine_polygons.json b/test/mainz/mainz_000001_044366_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_044366_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_044619_gtFine_labelIds.png b/test/mainz/mainz_000001_044619_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_044619_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_044619_gtFine_polygons.json b/test/mainz/mainz_000001_044619_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_044619_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_045197_gtFine_color.png b/test/mainz/mainz_000001_045197_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000001_045197_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000001_045197_gtFine_polygons.json b/test/mainz/mainz_000001_045197_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_045197_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_045385_gtFine_polygons.json b/test/mainz/mainz_000001_045385_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_045385_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_045651_gtFine_instanceIds.png b/test/mainz/mainz_000001_045651_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_045651_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_045651_gtFine_labelIds.png b/test/mainz/mainz_000001_045651_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_045651_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_045651_gtFine_polygons.json b/test/mainz/mainz_000001_045651_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_045651_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_045782_gtFine_polygons.json b/test/mainz/mainz_000001_045782_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_045782_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_046381_gtFine_instanceIds.png b/test/mainz/mainz_000001_046381_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_046381_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_046381_gtFine_polygons.json b/test/mainz/mainz_000001_046381_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_046381_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_046981_gtFine_labelIds.png b/test/mainz/mainz_000001_046981_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_046981_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_046981_gtFine_polygons.json b/test/mainz/mainz_000001_046981_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_046981_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_047546_gtFine_polygons.json b/test/mainz/mainz_000001_047546_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_047546_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_047611_gtFine_instanceIds.png b/test/mainz/mainz_000001_047611_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_047611_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_047888_gtFine_instanceIds.png b/test/mainz/mainz_000001_047888_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_047888_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_047888_gtFine_polygons.json b/test/mainz/mainz_000001_047888_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_047888_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000001_048725_gtFine_instanceIds.png b/test/mainz/mainz_000001_048725_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000001_048725_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000001_048725_gtFine_labelIds.png b/test/mainz/mainz_000001_048725_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000001_048725_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000001_048725_gtFine_polygons.json b/test/mainz/mainz_000001_048725_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000001_048725_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000002_000181_gtFine_instanceIds.png b/test/mainz/mainz_000002_000181_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000002_000181_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000002_000181_gtFine_polygons.json b/test/mainz/mainz_000002_000181_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000002_000181_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000002_000381_gtFine_polygons.json b/test/mainz/mainz_000002_000381_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000002_000381_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000002_000912_gtFine_labelIds.png b/test/mainz/mainz_000002_000912_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000002_000912_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000002_001747_gtFine_instanceIds.png b/test/mainz/mainz_000002_001747_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000002_001747_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000002_001747_gtFine_polygons.json b/test/mainz/mainz_000002_001747_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000002_001747_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000002_001871_gtFine_labelIds.png b/test/mainz/mainz_000002_001871_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000002_001871_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000002_001871_gtFine_polygons.json b/test/mainz/mainz_000002_001871_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000002_001871_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000002_002279_gtFine_polygons.json b/test/mainz/mainz_000002_002279_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000002_002279_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_000043_gtFine_instanceIds.png b/test/mainz/mainz_000003_000043_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000003_000043_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000003_000043_gtFine_polygons.json b/test/mainz/mainz_000003_000043_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_000043_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_000968_gtFine_polygons.json b/test/mainz/mainz_000003_000968_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_000968_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_001465_gtFine_labelIds.png b/test/mainz/mainz_000003_001465_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_001465_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_001465_gtFine_polygons.json b/test/mainz/mainz_000003_001465_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_001465_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_001694_gtFine_labelIds.png b/test/mainz/mainz_000003_001694_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_001694_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_001694_gtFine_polygons.json b/test/mainz/mainz_000003_001694_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_001694_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_001899_gtFine_color.png b/test/mainz/mainz_000003_001899_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000003_001899_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000003_001899_gtFine_polygons.json b/test/mainz/mainz_000003_001899_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_001899_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_003042_gtFine_polygons.json b/test/mainz/mainz_000003_003042_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_003042_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_003455_gtFine_instanceIds.png b/test/mainz/mainz_000003_003455_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000003_003455_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000003_003455_gtFine_polygons.json b/test/mainz/mainz_000003_003455_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_003455_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_003558_gtFine_instanceIds.png b/test/mainz/mainz_000003_003558_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000003_003558_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000003_003558_gtFine_labelIds.png b/test/mainz/mainz_000003_003558_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_003558_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_003711_gtFine_polygons.json b/test/mainz/mainz_000003_003711_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_003711_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_003791_gtFine_color.png b/test/mainz/mainz_000003_003791_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000003_003791_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000003_003791_gtFine_polygons.json b/test/mainz/mainz_000003_003791_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_003791_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_003942_gtFine_labelIds.png b/test/mainz/mainz_000003_003942_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_003942_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_003942_gtFine_polygons.json b/test/mainz/mainz_000003_003942_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_003942_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_004144_gtFine_labelIds.png b/test/mainz/mainz_000003_004144_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_004144_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_004228_gtFine_labelIds.png b/test/mainz/mainz_000003_004228_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_004228_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_004228_gtFine_polygons.json b/test/mainz/mainz_000003_004228_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_004228_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_004576_gtFine_polygons.json b/test/mainz/mainz_000003_004576_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_004576_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_004774_gtFine_polygons.json b/test/mainz/mainz_000003_004774_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_004774_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_004883_gtFine_labelIds.png b/test/mainz/mainz_000003_004883_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_004883_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_004883_gtFine_polygons.json b/test/mainz/mainz_000003_004883_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_004883_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_005029_gtFine_labelIds.png b/test/mainz/mainz_000003_005029_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_005029_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_005088_gtFine_color.png b/test/mainz/mainz_000003_005088_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000003_005088_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000003_005088_gtFine_instanceIds.png b/test/mainz/mainz_000003_005088_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000003_005088_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000003_005088_gtFine_labelIds.png b/test/mainz/mainz_000003_005088_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_005088_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_005088_gtFine_polygons.json b/test/mainz/mainz_000003_005088_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_005088_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_005162_gtFine_color.png b/test/mainz/mainz_000003_005162_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000003_005162_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000003_005162_gtFine_polygons.json b/test/mainz/mainz_000003_005162_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_005162_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_006478_gtFine_labelIds.png b/test/mainz/mainz_000003_006478_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_006478_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_006478_gtFine_polygons.json b/test/mainz/mainz_000003_006478_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_006478_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_006863_gtFine_instanceIds.png b/test/mainz/mainz_000003_006863_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000003_006863_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000003_006863_gtFine_labelIds.png b/test/mainz/mainz_000003_006863_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_006863_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_006863_gtFine_polygons.json b/test/mainz/mainz_000003_006863_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_006863_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_007024_gtFine_color.png b/test/mainz/mainz_000003_007024_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000003_007024_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000003_007024_gtFine_labelIds.png b/test/mainz/mainz_000003_007024_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_007024_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_007024_gtFine_polygons.json b/test/mainz/mainz_000003_007024_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_007024_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_007144_gtFine_polygons.json b/test/mainz/mainz_000003_007144_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_007144_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_007255_gtFine_polygons.json b/test/mainz/mainz_000003_007255_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_007255_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_007701_gtFine_polygons.json b/test/mainz/mainz_000003_007701_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_007701_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_008258_gtFine_color.png b/test/mainz/mainz_000003_008258_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000003_008258_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000003_008258_gtFine_instanceIds.png b/test/mainz/mainz_000003_008258_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000003_008258_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000003_008258_gtFine_polygons.json b/test/mainz/mainz_000003_008258_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_008258_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_008690_gtFine_labelIds.png b/test/mainz/mainz_000003_008690_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_008690_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_008690_gtFine_polygons.json b/test/mainz/mainz_000003_008690_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_008690_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_008876_gtFine_labelIds.png b/test/mainz/mainz_000003_008876_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_008876_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_008876_gtFine_polygons.json b/test/mainz/mainz_000003_008876_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_008876_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_009819_gtFine_instanceIds.png b/test/mainz/mainz_000003_009819_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000003_009819_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000003_009819_gtFine_polygons.json b/test/mainz/mainz_000003_009819_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_009819_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_010019_gtFine_labelIds.png b/test/mainz/mainz_000003_010019_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_010019_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_010019_gtFine_polygons.json b/test/mainz/mainz_000003_010019_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_010019_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_010772_gtFine_polygons.json b/test/mainz/mainz_000003_010772_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_010772_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_010880_gtFine_polygons.json b/test/mainz/mainz_000003_010880_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_010880_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_010924_gtFine_labelIds.png b/test/mainz/mainz_000003_010924_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_010924_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_010924_gtFine_polygons.json b/test/mainz/mainz_000003_010924_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_010924_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_011182_gtFine_polygons.json b/test/mainz/mainz_000003_011182_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_011182_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_011352_gtFine_polygons.json b/test/mainz/mainz_000003_011352_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_011352_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_011949_gtFine_color.png b/test/mainz/mainz_000003_011949_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000003_011949_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000003_012168_gtFine_color.png b/test/mainz/mainz_000003_012168_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000003_012168_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000003_012168_gtFine_labelIds.png b/test/mainz/mainz_000003_012168_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_012168_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_012168_gtFine_polygons.json b/test/mainz/mainz_000003_012168_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_012168_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_012341_gtFine_color.png b/test/mainz/mainz_000003_012341_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000003_012341_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000003_012341_gtFine_polygons.json b/test/mainz/mainz_000003_012341_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_012341_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_012995_gtFine_labelIds.png b/test/mainz/mainz_000003_012995_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_012995_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_012995_gtFine_polygons.json b/test/mainz/mainz_000003_012995_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_012995_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_013348_gtFine_instanceIds.png b/test/mainz/mainz_000003_013348_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000003_013348_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000003_013348_gtFine_polygons.json b/test/mainz/mainz_000003_013348_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_013348_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_013983_gtFine_labelIds.png b/test/mainz/mainz_000003_013983_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_013983_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_013983_gtFine_polygons.json b/test/mainz/mainz_000003_013983_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_013983_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_014083_gtFine_polygons.json b/test/mainz/mainz_000003_014083_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_014083_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_014319_gtFine_polygons.json b/test/mainz/mainz_000003_014319_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_014319_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_014457_gtFine_color.png b/test/mainz/mainz_000003_014457_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000003_014457_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000003_014457_gtFine_instanceIds.png b/test/mainz/mainz_000003_014457_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000003_014457_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000003_014457_gtFine_polygons.json b/test/mainz/mainz_000003_014457_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_014457_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_014537_gtFine_labelIds.png b/test/mainz/mainz_000003_014537_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_014537_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_014537_gtFine_polygons.json b/test/mainz/mainz_000003_014537_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_014537_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_014959_gtFine_color.png b/test/mainz/mainz_000003_014959_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000003_014959_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000003_014959_gtFine_instanceIds.png b/test/mainz/mainz_000003_014959_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000003_014959_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000003_015411_gtFine_polygons.json b/test/mainz/mainz_000003_015411_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_015411_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_015649_gtFine_labelIds.png b/test/mainz/mainz_000003_015649_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_015649_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_015649_gtFine_polygons.json b/test/mainz/mainz_000003_015649_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_015649_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_015917_gtFine_color.png b/test/mainz/mainz_000003_015917_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000003_015917_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000003_015917_gtFine_polygons.json b/test/mainz/mainz_000003_015917_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_015917_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_016360_gtFine_color.png b/test/mainz/mainz_000003_016360_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000003_016360_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000003_016360_gtFine_polygons.json b/test/mainz/mainz_000003_016360_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_016360_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_016542_gtFine_polygons.json b/test/mainz/mainz_000003_016542_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_016542_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_016708_gtFine_color.png b/test/mainz/mainz_000003_016708_gtFine_color.png
new file mode 100644
index 0000000000000000000000000000000000000000..cc946524a479635425855582c6614066fd9cc56b
--- /dev/null
+++ b/test/mainz/mainz_000003_016708_gtFine_color.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6905dffce6383aefc35711e06541b132acc62b2b19daf9f5c362a3f42e96e3d
+size 10726
diff --git a/test/mainz/mainz_000003_016708_gtFine_instanceIds.png b/test/mainz/mainz_000003_016708_gtFine_instanceIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..71b55f67bd90c14cdbe637a73b6819977e0e9b3b
--- /dev/null
+++ b/test/mainz/mainz_000003_016708_gtFine_instanceIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99b1396198ac7674f57eaf4e7ba1216fe607232b23463b720c3a9b7c7133eef8
+size 7764
diff --git a/test/mainz/mainz_000003_016708_gtFine_polygons.json b/test/mainz/mainz_000003_016708_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_016708_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_016877_gtFine_polygons.json b/test/mainz/mainz_000003_016877_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_016877_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/mainz/mainz_000003_017171_gtFine_labelIds.png b/test/mainz/mainz_000003_017171_gtFine_labelIds.png
new file mode 100644
index 0000000000000000000000000000000000000000..22fe17c50a9d55f63f222a21bb5fd90ee9cf1ee4
--- /dev/null
+++ b/test/mainz/mainz_000003_017171_gtFine_labelIds.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:86c039b26f154dd77eef230e87250f7337f7606b7823216d20724e311bee70bb
+size 5531
diff --git a/test/mainz/mainz_000003_017171_gtFine_polygons.json b/test/mainz/mainz_000003_017171_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..b15b4a497ae5caf2c783770e1f98f24eb54aed9d
--- /dev/null
+++ b/test/mainz/mainz_000003_017171_gtFine_polygons.json
@@ -0,0 +1,236 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    24, 
+                    1023
+                ], 
+                [
+                    25, 
+                    1015
+                ], 
+                [
+                    386, 
+                    970
+                ], 
+                [
+                    557, 
+                    949
+                ], 
+                [
+                    822, 
+                    924
+                ], 
+                [
+                    1063, 
+                    908
+                ], 
+                [
+                    1203, 
+                    900
+                ], 
+                [
+                    1203, 
+                    896
+                ], 
+                [
+                    1179, 
+                    892
+                ], 
+                [
+                    1161, 
+                    873
+                ], 
+                [
+                    1156, 
+                    856
+                ], 
+                [
+                    1158, 
+                    838
+                ], 
+                [
+                    1164, 
+                    823
+                ], 
+                [
+                    1172, 
+                    811
+                ], 
+                [
+                    1195, 
+                    798
+                ], 
+                [
+                    1223, 
+                    796
+                ], 
+                [
+                    1252, 
+                    809
+                ], 
+                [
+                    1265, 
+                    838
+                ], 
+                [
+                    1260, 
+                    867
+                ], 
+                [
+                    1239, 
+                    888
+                ], 
+                [
+                    1221, 
+                    892
+                ], 
+                [
+                    1221, 
+                    897
+                ], 
+                [
+                    1366, 
+                    905
+                ], 
+                [
+                    1621, 
+                    922
+                ], 
+                [
+                    1881, 
+                    943
+                ], 
+                [
+                    2047, 
+                    958
+                ], 
+                [
+                    2047, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    416, 
+                    0
+                ], 
+                [
+                    2047, 
+                    28
+                ], 
+                [
+                    2047, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    2047, 
+                    509
+                ], 
+                [
+                    2047, 
+                    1023
+                ], 
+                [
+                    2037, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    0, 
+                    474
+                ], 
+                [
+                    17, 
+                    0
+                ]
+            ]
+        }, 
+        {
+            "label": "rectification border", 
+            "polygon": [
+                [
+                    1086, 
+                    983
+                ], 
+                [
+                    0, 
+                    977
+                ], 
+                [
+                    0, 
+                    1023
+                ], 
+                [
+                    1937, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/munich/munich_000197_000019_gtFine_polygons.json b/test/munich/munich_000197_000019_gtFine_polygons.json
new file mode 100644
index 0000000000000000000000000000000000000000..6bd94e58df26ea055ef6aa1f6c7853ccf81ee3ce
--- /dev/null
+++ b/test/munich/munich_000197_000019_gtFine_polygons.json
@@ -0,0 +1,132 @@
+{
+    "imgHeight": 1024, 
+    "imgWidth": 2048, 
+    "objects": [
+        {
+            "label": "ego vehicle", 
+            "polygon": [
+                [
+                    271, 
+                    1023
+                ], 
+                [
+                    387, 
+                    1009
+                ], 
+                [
+                    549, 
+                    993
+                ], 
+                [
+                    821, 
+                    966
+                ], 
+                [
+                    1082, 
+                    950
+                ], 
+                [
+                    1142, 
+                    947
+                ], 
+                [
+                    1112, 
+                    932
+                ], 
+                [
+                    1096, 
+                    896
+                ], 
+                [
+                    1108, 
+                    861
+                ], 
+                [
+                    1137, 
+                    844
+                ], 
+                [
+                    1175, 
+                    844
+                ], 
+                [
+                    1204, 
+                    867
+                ], 
+                [
+                    1209, 
+                    897
+                ], 
+                [
+                    1195, 
+                    931
+                ], 
+                [
+                    1161, 
+                    945
+                ], 
+                [
+                    1376, 
+                    957
+                ], 
+                [
+                    1654, 
+                    977
+                ], 
+                [
+                    1883, 
+                    1002
+                ], 
+                [
+                    2028, 
+                    1023
+                ]
+            ]
+        }, 
+        {
+            "label": "out of roi", 
+            "polygon": [
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    2048, 
+                    0
+                ], 
+                [
+                    2048, 
+                    1024
+                ], 
+                [
+                    0, 
+                    1024
+                ], 
+                [
+                    0, 
+                    0
+                ], 
+                [
+                    5, 
+                    5
+                ], 
+                [
+                    5, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    1019
+                ], 
+                [
+                    2043, 
+                    5
+                ], 
+                [
+                    5, 
+                    5
+                ]
+            ]
+        }
+    ]
+}
\ No newline at end of file