hat gewisse Aehnlichkeit zum LASER Graffiti http://vision.eng.shu.ac.uk/mediawiki/index.php/Interactive_Camera-Projector... --- snip --- ... The software makes use of a low cost off-the shelf webcam that is calibrated against a standard projector screen. The webcam is used to determine the position of physical pointer (e.g. a pen) which is then used to virtually move the X11 pointer. Point-and-click functionality has also been implemented. ... --- snap ---