I have only just started looking at the problem and (coincidentally) found this thread on the front page of HN so I couldn't resist asking the question!
I will look into OpenCV, is it the go-to libary for these kind of problems?
I will look into OpenCV, is it the go-to libary for these kind of problems?
How easy the task is depends on the nature of your game. If your players have a red outline and that's the only red in the scene, no big deal.