new_contents: from __future__ import print_function, division
  import imgaug as ia
  import imgaug.augmenters as iaa
  
  
  def main():
      black_and_white = iaa.RandomColorsBinaryImageColorizer(
          color_fg=255, color_bg=0)
  
      print("alpha=1.0, black and white")
      image = ia.quokka_square((128, 128))
      aug = iaa.Canny(alpha=1.0, colorizer=black_and_white)
      ia.imshow(ia.draw_grid(aug(images=[image] * (5*5))))
  
      print("alpha=1.0, random color")
      image = ia.quokka_square((128, 128))
      aug = iaa.Canny(alpha=1.0)
      ia.imshow(ia.draw_grid(aug(images=[image] * (5*5))))
  
      print("alpha=1.0, sobel ksize=[3, 13], black and white")
      image = ia.quokka_square((128, 128))
      aug = iaa.Canny(alpha=1.0, sobel_kernel_size=[3, 7],
                      colorizer=black_and_white)
      ia.imshow(ia.draw_grid(aug(images=[image] * (5*5))))
  
      print("alpha=1.0, sobel ksize=3, black and white")
      image = ia.quokka_square((128, 128))
      aug = iaa.Canny(alpha=1.0, sobel_kernel_size=3,
                      colorizer=black_and_white)
      ia.imshow(ia.draw_grid(aug(images=[image] * (5*5))))
  
      print("fully random")
      image = ia.quokka_square((128, 128))
      aug = iaa.Canny()
      ia.imshow(ia.draw_grid(aug(images=[image] * (5*5))))
  
  
  if __name__ == "__main__":
      main()
  
subject: Add check script for canny