Very nice lightsculpture by artist Rosalie in the foyer of the Zentrum für Kunst und Medien (ZKM) in Karlsruhe Germany.
Chroma – Lightsculpture
Painting with a laser
This project allows to paint virtually with a laser. The laser is tracked with a camera while the software generated “painting” is then projected with an video projector. The Source code for the tracker is open source. How To and source code