Train/Valid/Test Split after Tiling?

Heya folks, I was wondering if we can do the train/valid/test split after tiling the images? I only have 8 images total in my database, but each image contains hundreds of tracks that I want to identify. The tiling feature in the augmentation part works briliantly, but it keeps the 50/25/25 split that I have from the original 8. Is it possible to change this split after tiling? Ideally I want to have 80/10/10 with all the images after tiling.