coco
https://dohyeon.tistory.com/m/15
coco viewer
https://github.com/trsvchn/coco-viewer
coco 예시
~/git/mmdetection/data/coco/annotations/person_keypoints_val2017.json
https://dohyeon.tistory.com/m/15
https://github.com/trsvchn/coco-viewer
~/git/mmdetection/data/coco/annotations/person_keypoints_val2017.json