text: import os
  import pandas as pd
  import json
  from os.path import join as pjoin
  import time
  import cv2
  
  
  def save_corners(file_path, corners, compo_name, clear=True):
      try:
          df = pd.read_csv(file_path, index_col=0)
      except:
          df = pd.DataFrame(columns=['component', 'x_max', 'x_min', 'y_max', 'y_min', 'height', 'width'])
  
      if clear:
          df = df.drop(df.index)
      for corner in corners:
          (up_left, bottom_right) = corner
          c = {'component': compo_name}
          (c['y_min'], c['x_min']) = up_left
          (c['y_max'], c['x_max']) = bottom_right
          c['width'] = c['y_max'] - c['y_min']
          c['height'] = c['x_max'] - c['x_min']
          df = df.append(c, True)
      df.to_csv(file_path)
  
  
  def save_corners_json(file_path, compos):
      img_shape = compos[0].image_shape
      output = {'img_shape': img_shape, 'compos': []}
      f_out = open(file_path, 'w')
  
      for compo in compos:
          c = {'id': compo.id, 'class': compo.category}
          (c['column_min'], c['row_min'], c['column_max'], c['row_max']) = compo.put_bbox()
          c['width'] = compo.width
          c['height'] = compo.height
          output['compos'].append(c)
  
      json.dump(output, f_out, indent=4)
  
  
  def save_clipping(org, output_root, corners, compo_classes, compo_index):
      if not os.path.exists(output_root):
          os.mkdir(output_root)
      pad = 2
      for i in range(len(corners)):
          compo = compo_classes[i]
          (up_left, bottom_right) = corners[i]
          (col_min, row_min) = up_left
          (col_max, row_max) = bottom_right
          col_min = max(col_min - pad, 0)
          col_max = min(col_max + pad, org.shape[1])
          row_min = max(row_min - pad, 0)
          row_max = min(row_max + pad, org.shape[0])
  
          # if component type already exists, index increase by 1, otherwise add this type
          compo_path = pjoin(output_root, compo)
          if compo_classes[i] not in compo_index:
              compo_index[compo_classes[i]] = 0
              if not os.path.exists(compo_path):
                  os.mkdir(compo_path)
          else:
              compo_index[compo_classes[i]] += 1
          clip = org[row_min:row_max, col_min:col_max]
          cv2.imwrite(pjoin(compo_path, str(compo_index[compo_classes[i]]) + '.png'), clip)
  
  
  def build_directory(directory):
      if not os.path.exists(directory):
          os.mkdir(directory)
      return directory
  