Add session count_1000 as the test split

README.md

@@ -17,6 +17,8 @@ configs:
   data_files:
   - split: train
     path: data/train/**
+  - split: test
+    path: data/test/**
 ---
 
 # corn1000 — counted cereal kernels on A4
@@ -31,9 +33,9 @@ protocol is built around label correctness.
 
 | | |
 |---|---|
-| Images | 751 |
-| Arrangements (distinct kernel layouts) | 123 |
-| Kernels per image | 170 – 800 |
+| Images | 836 |
+| Arrangements (distinct kernel layouts) | 128 |
+| Kernels per image | 170 – 1000 |
 | Images with point annotations | 158 |
 
 | Session | Species | Pollution | Cameras | Images | Arrangements | Kernels |
@@ -42,6 +44,7 @@ protocol is built around label correctness.
 | S03 | barley-w | light | Galaxy S23, Galaxy Tab S6 Lite, iPhone 8 | 231 | 28 | 225–733 |
 | S04 | wheat-w | light | Galaxy Tab S6 Lite, Pixel 9 | 131 | 33 | 170–800 |
 | S05 | durum-w | light | Galaxy S23, iPhone 8 | 265 | 31 | 230–782 |
+| count_1000 | barley-w, durum-w, rye-w, wheat-w, oats-s | light, none | Galaxy S23, iPhone 8 | 85 | 5 | 1000–1000 |
 
 ## Fields
 
@@ -94,6 +97,11 @@ occur in the use case, so some sessions deliberately contain them as noise (`pol
   against the Pixel photos.
 - **S05:** winter durum wheat (`durum-w`), lightly polluted; Galaxy S23 (shot as
   DNG) and iPhone 8; 2026-10-15.
+- **count_1000:** the `test` split. All five species with exactly 1000 kernels in every
+  photo, 13–21 photos per species; barley lightly polluted, the others not polluted;
+  Galaxy S23 (shot as DNG) and iPhone 8; 2026-10-26. No session cards were photographed:
+  the species were assigned by capture time and checked by eye, and each species is one
+  `arrangement_id`.
 
 ## Splitting
 
@@ -102,6 +110,8 @@ several angles), and consecutive arrangements of a session share most of their k
 Split by `session`; never by image, and never by `arrangement_id`
 alone.
 
+The `test` split is session `count_1000` (see *Sessions*); `train` holds all other sessions.
+
 ## Loading
 
 ```python