Just letting Darsha enjoy the power of the ReacTIVision Software.

and just to know there’s a little information about the free software.

reacTIVision 1.4

reacTIVision is an open source, cross-platform computer vision framework for the fast and robust tracking of fiducial markers attached onto physical objects, as well as for multi-touch finger tracking. It was mainly designed as a toolkit for the rapid development of table-based tangible user interfaces (TUI) and multi-touch interactive surfaces. This framework has been developed by Martin Kaltenbrunner and Ross Bencina at the Music Technology Group at the Universitat Pompeu Fabra in Barcelona, Spain as part of the the reactable project, a novel electronic music instrument with a table-top multi-touch tangible user interface.