class_docstr: Normalize a ndarray image with mean and standard deviation.
code: def __repr__(self):
      return self.__class__.__name__ + "(mean={0}, std={1})".format(
          self.mean, self.std
      )
  
imports: import random
  import cv2
  import numpy
  import torch
  from scipy import signal
label_desc: Use image node_id 3 for calling the Normalize obj's underlying member method code with example usage: obj.__repr__() and returns: unknown