code: def adjust_brightness(image, delta):
      """Adjust brightness of an image
  
      Args
          image: Image to adjust.
          delta: Brightness offset between -1 and 1 added to the pixel values.
      """
      return _clip(image + delta * 255)
  
imports: from __future__ import division
  import numpy
  import cv2
  from PIL import Image
  from .transform import change_transform_origin
label_desc: Use image node_id 12 for calling a global function with example usage: adjust_brightness(image, delta) and returns: _clip