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Proceedings Paper

Portable whiteboard system with vision input
Author(s): Ferdinand Hendriks; Xiping Wang; Belle L. Tseng; Zon-Yin Shae
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Paper Abstract

We present a novel whiteboard system that uses one or more active input devices. The system is especially suitable for situations in which several users provide input on a large writing surface which also serves as a projection surface. That surface can have general orientation. We have implemented a system that uses an inexpensive, infrared-emitting stylus and an off-the-shelf videoconferencing camera fitted with an IR transmitting/visible blocking filter to capture handwritten strokes. The system uses a calibration method that uses projective mapping thus allowing off-axis camera placement. We also propose a self-calibrating system in which the capture device shares its optical system with the projector. In a system with multiple local users the question of 'who wrote what' becomes relevant. Therefore, we address the question of attaching identify to stroke information.

Paper Details

Date Published: 29 December 2000
PDF: 7 pages
Proc. SPIE 4310, Visual Communications and Image Processing 2001, (29 December 2000); doi: 10.1117/12.411865
Show Author Affiliations
Ferdinand Hendriks, IBM Thomas J. Watson Research Ctr. (United States)
Xiping Wang, IBM Thomas J. Watson Research Ctr. (United States)
Belle L. Tseng, IBM Thomas J. Watson Research Ctr. (United States)
Zon-Yin Shae, IBM Thomas J. Watson Research Ctr. (United States)


Published in SPIE Proceedings Vol. 4310:
Visual Communications and Image Processing 2001
Bernd Girod; Charles A. Bouman; Eckehard G. Steinbach, Editor(s)

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