docstr: Run as a service.
code: def serving_method(self, images, **kwargs):
      """
      Run as a service.
      """
      images_decode = [base64_to_cv2(image) for image in images]
      results = self.recognize_text(images_decode, **kwargs)
      return results
  
imports: import argparse
  import ast
  import copy
  import math
  import os
  import time
  import cv2
  import numpy
  import paddle
  from paddle.inference import Config
  from paddle.inference import create_predictor
  from PIL import Image
  import paddlehub
  from .character import CharacterOps
  from .utils import base64_to_cv2
  from .utils import draw_ocr
  from .utils import get_image_ext
  from .utils import sorted_boxes
  from paddlehub.module.module import moduleinfo
  from paddlehub.module.module import runnable
  from paddlehub.module.module import serving
  from paddlehub.utils.log import logger
label_desc: Use image node_id 9 for calling the ChineseOCRDBCRNN obj's underlying member method code with example usage: obj.serving_method(images) and returns: results