Pranav Mistry, Pattie Maes and Liyan Chang from MIT's Media Lab have managed to create an invisible computer mouse for just a few dollars. Using an Infrared laser and tracking camera, the Mouseless system registers and interprets a user's hand movement and translates it into onscreen actions such as cursor movement and button clicking.
While others take the familiar input peripheral to new levels by cramming as many buttons as possible onto it or making the surface available for multi-touch interaction or even moving the whole experience to the end of a user's leg, Pranav Mistry and colleagues have dispensed with its physical form altogether.
The developers are continuing to improve the tracking and recognition algorithms to build up a library of commands, possibly leading to multi-touch gesturing in addition to simple click confirmation.
The prototype system is said to have cost just US$20 to put together and can be seen in action in the following demonstration:
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