hikrr

[[keep_res](https://github.com/xingyizhou/CenterNet/blob/master/readme/GETTING_STARTED.md#coco)](https://github.com/xingyizhou/CenterNet/blob/master/readme/GETTING_STARTED.md#coco) says > --keep_res is for keep the original image resolution. Without --keep_res it will resize the images to 512 x 512

I also want to ask whether it is possible to have a timeline renderer support for react. Or any examples or existing projects using react with markwhen to learn from....

@twmht I add a bg class in my annotation file and it worked.