[zoop]

Since it seems like they are having a computer do the image analysis, background subtraction on the image processing end of things seems like it would yield much better results. Since a turret can only point at one place anyways, they don't necessarily need to pick out a single entity, so aiming at the place of last movement would aim at anything without the need of a red shirt.

[icebraining]

Yeah, it's what the guy in Militarizing Your Backyard with Python[1][2] did, using OpenCV, and that could target squirrels in a natural environment.

[1]: http://pyvideo.org/video/674/militarizing-your-backyard-with...

[2]: https://news.ycombinator.com/item?id=3710107