Hi…I am very much eager to convert the following code into opencv GPU, what is the correct way to do that?

import os
import cv2
import time
import numpy as np

from google.colab import drive

drive.mount('/content/gdrive')

def normalize_mat(depth_src):
      depth_min = depth_src.min()
      depth_max = depth_src.max()
      depth = (depth_src - depth_min) / (depth_max - depth_min)

     return depth

def generate_stereo(depth_dir, depth_prefix, filename):
      print("=== Start processing:", filename, "===")
      depth_src = cv2.imread(os.path.join(depth_dir, depth_prefix + filename + ".jpg"))

      if len(depth_src.shape) == 3:
          depth_src = cv2.cvtColor(depth_src, cv2.COLOR_BGR2GRAY)
      else:
         depth_src = depth_src

      depth = normalize_mat(depth_src)
      depth = np.round(depth*255).astype(int)
      cv2.imwrite(os.path.join(depth_dir, "normaized_depth_" + filename + ".jpg"), depth)

def file_processing_im(depth_dir, depth_prefix):
      for f in os.listdir(depth_dir):
           filename = f.split(".")[0]
           generate_stereo(depth_dir, depth_prefix, filename)

def main():
      start_time = time.time()
      depth_dir = 'gdrive/MyDrive/depth/'
      depth_prefix = 'Depth_'
      file_processing_im(depth_dir, depth_prefix)
      print(time.time() - start_time, "seconds for base generation")

if name == "main":
      main()