code: def postprocess(self, feed={}, fetch=[], fetch_map=None):
      rec_res = self.ocr_reader.postprocess(fetch_map, with_score=True)
      res_lst = []
      for res in rec_res:
          res_lst.append(res[0])
      res = {"res": res_lst}
      return res
  
file_path: PaddleOCR/deploy/pdserving/win/ocr_web_server.py
imports: from paddle_serving_client import Client
  import cv2
  import sys
  import numpy
  import os
  from paddle_serving_client import Client
  from paddle_serving_app.reader import Sequential, URL2Image, ResizeByFactor
  from paddle_serving_app.reader import Div, Normalize, Transpose
  from paddle_serving_app.reader import DBPostProcess, FilterBoxes, GetRotateCropImage, SortedBoxes
  from ocr_reader import OCRReader
  from paddle_serving_app.local_predict import LocalPredictor
  import time
  import re
  import base64
label_desc: Use image node_id 3 for calling the OCRService obj's underlying member method code with example usage: obj.postprocess(feed, fetch, fetch_map) and returns: res