“Turning a graphics tablet into a transparent blackboard” by Loviscach

Most lectures in mathematics and in the natural sciences make prominent use of blackboards. Developing an idea is much more natural and interactive with hand-drawn sketches than with glitzy prepared slides. The art of drawing is undergoing a renaissance, which can be seen in literature [Roam 2008] as well as in educational videos on the Web. This work demonstrates a low-cost real-time system to visually enhance such lectures. Unlike related past approaches that started with [Ishii and Kobayashi 1992], it works with a minimal setup such as a tablet PC with integrated webcam.

1. Ishii, H., and Kobayashi, M. 1992. ClearBoard: a seamless medium for shared drawing and conversation with eye contact. In CHI ’92, 525–532.
2. Roam, D. 2008. The Back of the Napkin: Solving Problems and Selling Ideas with Pictures. Portfolio, Penguin, NY.
3. RSA, 2011. RSA Animates. http://comment.rsablogs.org.uk/videos/.
4. Wigdor, D., Forlines, C., Baudisch, P., Barnwell, J., and Shen, C. 2007. Lucid touch: a see-through mobile device. In UIST ’07, 269–278.