The $3 Recognizer: Simple 3D Gesture Recognition on Mobile Devices

We present the $3 Gesture Recognizer, a simple but robust gesture recognition system for input devices featuring 3D acceleration sensors. The algorithm is designed to be implemented quickly in prototyping environments, is intended to be device-independent and does not require any special toolkits or frameworks, but relies solely on simple trigonometric and geometric calculations. Our method requires significantly less training data than other gesture recognizers and is thus suited to be deployed and to deliver results rapidly.