code: def autocrop(im, autocrop=False, **kwargs):
      
      if autocrop:
          # If transparent, flatten.
          if utils.is_transparent(im):
              no_alpha = Image.new('L', im.size, (255))
              no_alpha.paste(im, mask=im.split()[-1])
          else:
              no_alpha = im.convert('L')
          # Convert to black and white image.
          bw = no_alpha.convert('L')
          # bw = bw.filter(ImageFilter.MedianFilter)
          # White background.
          bg = Image.new('L', im.size, 255)
          bbox = ImageChops.difference(bw, bg).getbbox()
          if bbox:
              im = im.crop(bbox)
      return im
docs: Remove any unnecessary whitespace from the edges of the source image.
  
      This processor should be listed before :func:`scale_and_crop` so the
      whitespace is removed from the source image before it is resized.
  
      autocrop
          Activates the autocrop method for this image.