Hi,
Yesterday I was watching tennis. And I got an idea. I think it's possible to use a mocap system in for instance tennis to track whether a ball is in or out. You could probably sell a mocap system to any volleyball or tennis club to track whether the ball is in or out.
Using a mocap system at a tennis court
Re: Using a mocap system at a tennis court
In this case, you would be outside, which could cause some issues, due to external IR interference.