The video below details CamSpace a program that quickly and easily allows the user to set up object tracking to emulate mouse or joystick movement/clicks. This means that any PC (Mac and Linux coming soon) application or game could be controlled simply by using gestures.
It has a lot of potential for geographical applications, especially in exhibition/demo spaces. In some ways its similar to our previous work with Atlas Gloves and Google Earth using two ping pong balls and a LED light – movie below:
All you need is a webcam, see CamSpace for full details.