code: def crop_background_infor(self, im, text_polys, text_tags):
      im, text_polys, text_tags = self.crop_area(
          im, text_polys, text_tags, crop_background=True
      )
  
      if len(text_polys) > 0:
          return None
      # pad and resize image
      input_size = self.input_size
      im, ratio = self.preprocess(im)
      score_map = np.zeros((input_size, input_size), dtype=np.float32)
      geo_map = np.zeros((input_size, input_size, 9), dtype=np.float32)
      training_mask = np.ones(
          (input_size, input_size), dtype=np.float32
      )
      return im, score_map, geo_map, training_mask
  
file_path: PaddleOCR/ppocr/data/imaug/east_process.py
imports: import math
  import cv2
  import numpy
  import json
  import sys
  import os
label_desc: Use image node_id 10 for calling the EASTProcessTrain obj's underlying member method code with example usage: obj.crop_background_infor(im, text_polys, text_tags) and returns: im,  score_map,  geo_map,  training_mask, None