code: def fixed_image_standardization(image_tensor):
      processed_tensor = (image_tensor - 127.5) / 128.0
      return processed_tensor
  
imports: import torch
  from torch import nn
  import numpy
  import os
  from .utils.detect_face import detect_face, extract_face
label_desc: Use image node_id 1 for calling a global function with example usage: fixed_image_standardization(image_tensor) and returns: processed_tensor