Traditional mo-cap uses infrared cameras that track reflective balls placed on the outside of a suit worn by actors.

传统的动作捕捉器使用红外摄像机来跟踪放置在演员穿的套装外面的反光球。

We're not limited to running this algorithm on a single photo; we can do it for every frame in a video, allowing us to track the ball over time.

我们不仅限于在单张照片​​上运行此算法；我们可以对视频中的每一帧都这样做，这样我们就可以随着时间的推移跟踪球。