code: def regularize_pic(img):
      return img * 2.0 / 255.0 - 1.0
  
imports: import tensorflow
  import numpy
  from PIL import Image
  import sys
  from scipy import misc
  import os
  import time
  from adversarialbox.attacks.tf.tools import deepfool
  import facenet
label_desc: Use image node_id 2 for calling a global function with example usage: regularize_pic(img) and returns: unknown