update dataset.py

dataset.py

@@ -1,39 +1,43 @@
-.# dataset.py
-import json
 import os
+import json
 from datasets import GeneratorBasedBuilder, DatasetInfo, SplitGenerator, Split, Features, Value, Sequence, Image
 
 class TLPD(GeneratorBasedBuilder):
     def _info(self):
         return DatasetInfo(
+            description="Taiwan License Plate Dataset with LabelMe polygon annotations.",
             features=Features({
-                "image": Image(),
-                "label": Value("string"),
-                "points": Sequence(Sequence(Value("float32")))
-            }),
-            description="TLPD: Taiwan License Plate Dataset with polygon labels from LabelMe.",
+                "image": Image(),  # will auto-decode as PIL.Image
+                "label": Value("string"),  # "carplate"
+                "points": Sequence(Sequence(Value("float32")))  # [[x1,y1], [x2,y2], ...]
+            })
         )
 
     def _split_generators(self, dl_manager):
         return [
             SplitGenerator(
                 name=Split.TRAIN,
-                gen_kwargs={"images_dir": "images", "labels_dir": "labels"}
+                gen_kwargs={
+                    "images_dir": os.path.join(dl_manager.manual_dir, "images"),
+                    "labels_dir": os.path.join(dl_manager.manual_dir, "labels")
+                }
             )
         ]
 
     def _generate_examples(self, images_dir, labels_dir):
         for fname in sorted(os.listdir(labels_dir)):
-            if fname.endswith(".json"):
-                json_path = os.path.join(labels_dir, fname)
-                with open(json_path, "r") as f:
-                    data = json.load(f)
-                image_name = data["imagePath"]
-                image_path = os.path.join(images_dir, image_name)
-                points = data["shapes"][0]["points"]
-                label = data["shapes"][0]["label"]
-                yield fname, {
-                    "image": image_path,
-                    "label": label,
-                    "points": points
-                }
+            if not fname.endswith(".json"):
+                continue
+            label_path = os.path.join(labels_dir, fname)
+            with open(label_path, "r") as f:
+                data = json.load(f)
+            image_filename = data["imagePath"]
+            image_path = os.path.join(images_dir, image_filename)
+            label = data["shapes"][0]["label"]
+            points = data["shapes"][0]["points"]
+            key = fname.replace(".json", "")
+            yield key, {
+                "image": image_path,
+                "label": label,
+                "points": points
+            }