code: def main():
      image = data.astronaut()
      print("image shape:", image.shape)
      print(
          "Press ENTER or wait %d ms to proceed to the next image."
          % (TIME_PER_STEP,)
      )
  
      children_all = [
          ("hflip", iaa.Fliplr(1)),
          ("add", iaa.Add(50)),
          ("dropout", iaa.Dropout(0.2)),
          ("affine", iaa.Affine(rotate=35)),
      ]
  
      channels_all = [None, 0, [], [0], [0, 1], [1, 2], [0, 1, 2]]
  
      cv2.namedWindow("aug", cv2.WINDOW_NORMAL)
      cv2.imshow("aug", image[..., ::-1])
      cv2.waitKey(TIME_PER_STEP)
  
      for children_title, children in children_all:
          for channels in channels_all:
              aug = iaa.WithChannels(
                  channels=channels, children=children
              )
              img_aug = aug.augment_image(image)
              print(
                  "dtype",
                  img_aug.dtype,
                  "averages",
                  np.average(
                      img_aug, axis=tuple(range(0, img_aug.ndim - 1))
                  ),
              )
  
              title = "children=%s | channels=%s" % (
                  children_title,
                  channels,
              )
              img_aug = ia.draw_text(img_aug, x=5, y=5, text=title)
  
              cv2.imshow("aug", img_aug[..., ::-1])  # here with rgb2bgr
              cv2.waitKey(TIME_PER_STEP)
  
imports: from __future__ import print_function, division
  import cv2
  import numpy
  from skimage import data
  import imgaug
  from imgaug import augmenters
label_desc: Use image node_id 1 for calling a global function with example usage: main() without return types