|The MagicBoard augments a perfectly ordinary white board with
electronic capabilities, via a video projector and a pan / tilt
/ zoom camera.
The user works on the board as in the usual way, drawing or writing with ordinary marker pens. Whenever she chooses, the user can "grab" an electronic copy of the things that have been drawn or written with the marker pen. This copy is projected back onto the board, precisely overlaying the original markings with the appropriate colour. The physical ink may then be erased and the electronic version manipulated on the board's surface: it can be duplicated, moved, enlarged or reduced, printed, or hidden for a moment before being recalled. Meanwhile, the user may add to her designs with the marker pen as before. At any time, these new markings can be turned into digital form to merge with the electronic version of her work.
|The video-clip on the left (19.6 Mb) shows the system in use.
If your browser can't play the video, either download the quicktime player, or try an mpeg encoded (36.9 Mb) version of the video. Set your monitor to "thousands"
of colours for best results.
Note that the electronic ink does not show up very well in this video due to technical difficulties in filming video projection. In the actual setting, the physical and electronic inks are comparable.
|The image on the right is the result of the final capture in the above video clip. This is actually a very low resolution version of the captured image. A medium resolution version (40Kb, 900 x 675 pixels) is available, as well as the full resolution version (107Kb, 1800 x 1350 pixels).|
|If the capture is to be printed or processed by optical character recognition, the resolution can be increased by grabbing more images of the board. The image on the right is the result of a 6 by 6 mosaïquing of the image on the left (click on the images to get full resolution). The right image is also available at medium resolution (70Kb, 900 x 675 pixels), and at full resolution (340Kb, 3600 x 2700 pixels).|
|The systems runs on top of TclVision, a multi-platform interactive computer vision environment (MacOS / SGI IRIX / Linux / win2k). Our main workstation is a PowerMac 8600 (PPC 604 @ 350 Mhz). The system also runs (slower) on an SGI O2 (R10000 @ 150 Mhz).|
|The MagicBoard was developped in the Human-Computer Interaction group at CLIPS-IMAG laboratory in Grenoble, France.||Developers||François Bérard
|Related work||Pierre Wellner's DigitalDesk
Eric Saund's ZombieBoard