informed on a prototype where colored leds were tracked in free space. Jesper
Nielsen
came up with the idea to use a back-projected setup together with a back-mounted
camera for tracking colored led pens - very simpel and yet very novel.By using eyesWeb Jesper and I made a patch that could descriminate the different color pens and send their position and color over a network. After a bit of work we had a simple proof of concept running as seen on the images to the right.
Later Søren Boll
implemented a mlt-listener to notify on position, color, pen-up and pen-down
events - and by great help from Michael
Bang
a calibration package was developed that can relate the camera space to
the projection space. Kaspar
Rosengreen
and I developed the patch and the flash application giving multiple users
access to a shared table display. We improved the setup to run on only 40%
processor load with four different pens at 15 fps.See a quick video of the MLT system in use here
(9mb)