Update README.md

training and validation

README.md

@@ -43,7 +43,11 @@ pipeline_tag: image-segmentation
 ### Evaluation / Accuracy of Target Vegetation
 Rand Index: .92 - .96 (geographic latitude and regional variations)
 
-### Training data
+### Training and Validation data
+
+- 3840 256x256 RGB images and corresponding 256x256 binary mask images
+- ~ 1/3 allocated to validation
+- Separate test sets by latitude and region. Target species has regional color variations.
 
 ### Training hyperparameters