How Xbox Kinect's Motion Detection Works
Ever wondered how Microsoft Xbox Kinect's motion detection works? Wonder no longer, as Wired.com has your answers. First, an invisible light source lights you up, second, a sensor measures the distance the light travels to it, third, imaging software uses a depth map to perceive and identify objects (you) in real-time and lastly the device reacts accordingly.
Catch the full explanation as well as some helpful graphs over at Wired.com's How Motion Detection Works in Xbox Kinect.