TUIO is an open framework that defines a common protocol and API for tangible multitouch surfaces. The TUIO protocol allows the transmission of an abstract description of interactive surfaces, including touch events and tangible object states. This protocol encodes control data from a tracker application (e.g. based on computer vision) and sends it to any client application that is capable of decoding the protocol. There exists a growing number of TUIO enabled tracker applications and TUIO client libraries for various programming environments, as well as applications that support the protocol. This combination of TUIO trackers, protocol and client implementations allows the rapid development of table based tangible multitouch interfaces.
http://en.wikipedia.org/wiki/Tangible_User_Interface
http://www.tuio.org/
mtdev2tuio is a small tool that acts as a gateway between your linux multitouch device and the TUIO protocol.
http://repo.or.cz/w/mtdev2tuio.git
http://kivy.org Open source library for rapid development of applications that make use of innovative user interfaces, such as multi-touch apps.
http://en.wikipedia.org/wiki/Reactable
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