code: def uint162single(img):
      return np.float32(img / 65535.0)
  
imports: import math
  import os
  import random
  from datetime import datetime
  import cv2
  import numpy
  import torch
  from torchvision.utils import make_grid
label_desc: Use image node_id 19 for calling a global function with example usage: uint162single(img) and returns: np