code: def brightness(im, brightness_lower, brightness_upper):
      brightness_delta = np.random.uniform(
          brightness_lower, brightness_upper
      )
      im = ImageEnhance.Brightness(im).enhance(brightness_delta)
      return im
  
imports: import cv2
  import numpy
  from PIL import Image, ImageEnhance
  from scipy.ndimage import distance_transform_edt
label_desc: Use image node_id 9 for calling a global function with example usage: brightness(im, brightness_lower, brightness_upper) and returns: im