And one more thing -- since you are interested in using a camera, my setup may not be appropriate, or at least might be a lot more effort. The most straightforward way to get a camera up and running with a Pi would be to plug a monitor, mouse, and keyboard directly into the Pi, and use it as the only computing resource. I have never used a camera on a Pi, but I expect this would be very simple, with almost turnkey configurations using the Pi camera board and Mathematica (or Python). The only worry I would have is if you are using the new B+ Pi, which might have support issues with Mathematica. There are others on the forum who know much more about this than me -- maybe we will hear from them.
