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| # Copyright (c) OpenMMLab. All rights reserved. | |
| import json | |
| import os | |
| import os.path as osp | |
| import shutil | |
| from typing import List, Tuple | |
| from mmocr.registry import DATA_GATHERERS | |
| from .base import BaseGatherer | |
| class NAFGatherer(BaseGatherer): | |
| """Gather the dataset file from NAF dataset. Specifically for the case that | |
| there is a split file that contains the names of different splits. For | |
| example, | |
| img_001.jpg train: img_001.jpg | |
| img_002.jpg ---> split_file ---> test: img_002.jpg | |
| img_003.jpg val: img_003.jpg | |
| Args: | |
| split_file (str, optional): The name of the split file. Defaults to | |
| "data_split.json". | |
| temp_dir (str, optional): The directory of the temporary images. | |
| Defaults to "temp_images". | |
| """ | |
| def __init__(self, | |
| split_file='data_split.json', | |
| temp_dir: str = 'temp_images', | |
| **kwargs) -> None: | |
| super().__init__(**kwargs) | |
| self.temp_dir = temp_dir | |
| self.split_file = split_file | |
| def __call__(self) -> Tuple[List[str], List[str]]: | |
| """ | |
| Returns: | |
| tuple(list[str], list[str]): The list of image paths and the list | |
| of annotation paths. | |
| """ | |
| split_file = osp.join(self.data_root, self.split_file) | |
| with open(split_file, 'r') as f: | |
| split_data = json.load(f) | |
| img_list = list() | |
| ann_list = list() | |
| # Rename the key | |
| split_data['val'] = split_data.pop('valid') | |
| if not osp.exists(self.img_dir): | |
| os.makedirs(self.img_dir) | |
| current_split_data = split_data[self.split] | |
| for groups in current_split_data: | |
| for img_name in current_split_data[groups]: | |
| src_img = osp.join(self.data_root, self.temp_dir, img_name) | |
| dst_img = osp.join(self.img_dir, img_name) | |
| if not osp.exists(src_img): | |
| Warning(f'{src_img} does not exist!') | |
| continue | |
| # move the image to the new path | |
| shutil.move(src_img, dst_img) | |
| ann = osp.join(self.ann_dir, img_name.replace('.jpg', '.json')) | |
| img_list.append(dst_img) | |
| ann_list.append(ann) | |
| return img_list, ann_list | |