code: def post_process(self, raw_color, orig):
      color_np = np.asarray(raw_color)
      orig_np = np.asarray(orig)
      color_yuv = cv2.cvtColor(color_np, cv2.COLOR_BGR2YUV)
      orig_yuv = cv2.cvtColor(orig_np, cv2.COLOR_BGR2YUV)
      hires = np.copy(orig_yuv)
      hires[:, :, 1:3] = color_yuv[:, :, 1:3]
      final = cv2.cvtColor(hires, cv2.COLOR_YUV2BGR)
      return final
  
imports: import glob
  import os
  import cv2
  import numpy
  import paddle
  import paddle.nn
  from PIL import Image
  from tqdm import tqdm
  from .None import utils
  from .base_module import build_model
  from paddlehub.module.module import moduleinfo
  from paddlehub.module.module import serving
label_desc: Use image node_id 4 for calling the DeOldifyPredictor obj's underlying member method code with example usage: obj.post_process(raw_color, orig) and returns: final