title: How resize images when those converted to numpy array
body: <p>Consider we only have images as.npy file. Is it possible to resizing images  without converting their to images (because I'm looking for a way that is fast when run the code).
  for more info, I asked the way without converting to image, I have images but i don't want use those in code, because my dataset is too large and running with images is so slow, on the other hand, Im not sure which size is better for my imeges, So Im looking for a way that first convert images to npy and save .npy file and then preprocess npy file, for example resize the dimension of images. </p>