ValueError: Segmentation map contained invalid class values about pytorch-semseg

[kubitz]

Not exactly sure what is causing the error, but it will disappear if you turn data augmentation off

[farnaznouraei]

Not sure if this is a similar issue, but I was working with the Pascal dataloader and realized the .resize() functions used in the transforms are generating new (undefined) values in the segmentation map. If you change all data read/write and resize function to cv2 functions, with resizing via NEAREST NEIGHBOR (interpolation =cv2.INTER_NEAREST), it could help preserve the class integers/colors.