Skeltrack - Control Linux with Camera and Body
Skeltrack is a Free and Open Source Software library for tracking skeleton joints from depth images.
It is implemented with GLib and uses plain mathematics to detect the human skeleton and although it does not use any database, it was inspired by Andreas Baak's paper: A Data-Driven Approach for Real-Time Full Body Pose Reconstruction from a Depth Camera.
One or both hands are used control the mouse pointer, perform clicks, drag things around and simulates a pinch gesture which adjusts the zoom level. Hands can be also interpreted as if holding a steering wheel, making racing games so much fun.
Skeltrack is device independent however you can use a kinect to start with.
Visit the devs site @ http://www.joaquimrocha.com
Get the full source code @ https://github.com/joaquimrocha/Skeltrack