old_contents: import imgaug as ia
  import imgaug.augmenters as iaa
  
  
  def main():
      image = ia.quokka_square((128, 128))
      images_aug = iaa.Solarize(1.0)(images=[image] * (5*5))
      ia.imshow(ia.draw_grid(images_aug))
  
  
  if __name__ == "__main__":
      main()
  
new_contents: from __future__ import print_function, division, absolute_import
  import imgaug as ia
  import imgaug.augmenters as iaa
  import timeit
  
  
  def main():
      for size in [64, 128, 256, 512, 1024]:
          for threshold in [64, 128, 192]:
              time_iaa = timeit.timeit(
                  "iaa.solarize(image, %d)" % (threshold,),
                  number=1000,
                  setup=(
                      "import imgaug as ia; "
                      "import imgaug.augmenters as iaa; "
                      "image = ia.quokka_square((%d, %d))" % (size, size))
              )
              time_pil = timeit.timeit(
                  "np.asarray("
                  "PIL.ImageOps.solarize(PIL.Image.fromarray(image), %d)"
                  ")" % (threshold,),
                  number=1000,
                  setup=(
                      "import numpy as np; "
                      "import PIL.Image; "
                      "import PIL.ImageOps; "
                      "import imgaug as ia; "
                      "image = ia.quokka_square((%d, %d))" % (size, size))
              )
              print("[size=%04d, thresh=%03d] iaa=%.4f pil=%.4f" % (
                  size, threshold, time_iaa, time_pil))
  
      image = ia.quokka_square((128, 128))
      images_aug = iaa.Solarize(1.0)(images=[image] * (5*5))
      ia.imshow(ia.draw_grid(images_aug))
  
  
  if __name__ == "__main__":
      main()
  
subject: Add performance comparison with PIL