Active Filtering is a system that allows users to dynamically filter information displayed on a tangible user interface. It employs tracking four ir leds on a translucent filter that can be switched on or off by a user. Wherever the filter is located, the software will selectively display a sub-layer of that information, e.g. satelite data over a road map.
+ LCD Projector, Infrared-Enabled PS3 Eye, IR LEDs
+ 2012 Berry College Math Trail