Mobile interface for gesture control

A student at the University of Potsdam, Sean Gustafson, developed a full-featured interface that allows you to do anything with gestures - typing or drawing. The secret ingredient is a tiny finger-tracking camera that should always hang around your neck. To activate the interface, you need to show the letter L with the help of an unknowing hand, and with the other hand draw like a mouse. The system works surprisingly reliably.