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# Copyright (c) OpenMMLab. All rights reserved.
import argparse
import json
import mmengine
from mmocr.utils import list_to_file
def parse_coco_json(in_path):
json_obj = mmengine.load(in_path)
image_infos = json_obj['images']
annotations = json_obj['annotations']
imgid2imgname = {}
img_ids = []
for image_info in image_infos:
imgid2imgname[image_info['id']] = image_info
img_ids.append(image_info['id'])
imgid2anno = {}
for img_id in img_ids:
imgid2anno[img_id] = []
for anno in annotations:
img_id = anno['image_id']
new_anno = {}
new_anno['iscrowd'] = anno['iscrowd']
new_anno['category_id'] = anno['category_id']
new_anno['bbox'] = anno['bbox']
new_anno['segmentation'] = anno['segmentation']
if img_id in imgid2anno.keys():
imgid2anno[img_id].append(new_anno)
return imgid2imgname, imgid2anno
def gen_line_dict_file(out_path, imgid2imgname, imgid2anno):
lines = []
for key, value in imgid2imgname.items():
if key in imgid2anno:
anno = imgid2anno[key]
line_dict = {}
line_dict['file_name'] = value['file_name']
line_dict['height'] = value['height']
line_dict['width'] = value['width']
line_dict['annotations'] = anno
lines.append(json.dumps(line_dict))
list_to_file(out_path, lines)
def parse_args():
parser = argparse.ArgumentParser()
parser.add_argument('--in-path', help='input json path with coco format')
parser.add_argument(
'--out-path', help='output txt path with line-json format')
args = parser.parse_args()
return args
def main():
args = parse_args()
imgid2imgname, imgid2anno = parse_coco_json(args.in_path)
gen_line_dict_file(args.out_path, imgid2imgname, imgid2anno)
print('finish')
if __name__ == '__main__':
main()
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