code: def uint2single(img):
      return np.float32(img / 255.0)
  
imports: import os
  import math
  import random
  import numpy
  import torch
  import cv2
  from torchvision.utils import make_grid
  from datetime import datetime
label_desc: Use image node_id 17 for calling a global function with example usage: uint2single(img) and returns: np