@ptrblck
my code is basically exploring whether the preprocessing  and postprocessing for vessels segmentation using unet  can improve the accuracy, i used ( Flip ,Gaussian_noise, Uniform_noise , Brightness ,Elastic distort {0: distort, 1:no distort} ,Crop the image
,Pad the image, Sanity Check for Cropped image , Normalize the image  )
also dividing the training sets to val and train , but i am not getting a high accuracy also the index error