代碼源自RealESRGAN

import argparse
import cv2
import glob
import os

#應(yīng)該是用于生成 路徑信息的txt

def main(args):
   txt_file = open(args.meta_info, 'w')
   for folder, root in zip(args.input, args.root):
       img_paths = sorted(glob.glob(os.path.join(folder, '*')))
       for img_path in img_paths:
           status = True
           if args.check:
               # read the image once for check, as some images may have errors
               try:
                   img = cv2.imread(img_path)
               except (IOError, OSError) as error:
                   print(f'Read {img_path} error: {error}')
                   status = False
               if img is None:
                   status = False
                   print(f'Img is None: {img_path}')
           if status:
               # get the relative path
               img_name = os.path.relpath(img_path, root)
               print(img_name)
               txt_file.write(f'{img_name}\n')


if __name__ == '__main__':
   """
   args.meta_info：指定用于保存有效圖像相對路徑信息的輸出文件斯撮。
   args.input：包含要處理的輸入文件夾路徑的列表。
   args.root：與輸入文件夾對應(yīng)的根目錄廷没，用于計算相對路徑巴柿。
   args.check：指定是否需要檢查圖像文件的有效性炸裆。
   
   
python scripts/generate_meta_info.py --input datasets_temp/inputs/inputs_temp_HR --root datasets_temp/inputs --meta_info datasets_temp/inputs/meta_info/inputs_test_temp.txt
   """

   """Generate meta info (txt file) for only Ground-Truth images.

   It can also generate meta info from several folders into one txt file.
   """
   parser = argparse.ArgumentParser()
   parser.add_argument(
       '--input',
       nargs='+',
       default=['datasets/DF2K/DF2K_HR', 'datasets/DF2K/DF2K_multiscale'],
       help='Input folder, can be a list')
   parser.add_argument(
       '--root',
       nargs='+',
       default=['datasets/DF2K', 'datasets/DF2K'],
       help='Folder root, should have the length as input folders')
   parser.add_argument(
       '--meta_info',
       type=str,
       default='datasets/DF2K/meta_info/meta_info_DF2Kmultiscale.txt',
       help='txt path for meta info')
   parser.add_argument('--check', action='store_true', help='Read image to check whether it is ok')
   args = parser.parse_args()

   assert len(args.input) == len(args.root), ('Input folder and folder root should have the same length, but got '
                                              f'{len(args.input)} and {len(args.root)}.')
   os.makedirs(os.path.dirname(args.meta_info), exist_ok=True)

   main(args)