Solved by vmirly1 in post #2 
              
              
                It should not necessarily be within [-1, 1]. We are centering by the data by their mean mean=[0.04717693328857422] and dividing them by their standard-deviation (std=[0.12218446918562346]). So given that the input values of images are within [0, 1], after this mean-centering and standardization, the…