code: def main():
      image = ia.quokka_square((256, 256))
      ia.imshow(
          ia.draw_grid(
              [
                  iaa.quantize_uniform(image, 2),
                  iaa.quantize_uniform(image, 4),
                  iaa.quantize_uniform(image, 8),
                  iaa.quantize_uniform(image, 16),
                  iaa.quantize_uniform(image, 32),
                  iaa.quantize_uniform(image, 64),
              ],
              cols=6,
          )
      )
  
      aug = iaa.UniformColorQuantization((2, 16))
      ia.imshow(ia.draw_grid(aug(images=[image] * 16)))
  
imports: from __future__ import print_function, division
  import numpy
  import imgaug
  import imgaug.augmenters
label_desc: Use image node_id 1 for calling a global function with example usage: main() without return types