Total recall: in-place viewing of captured whiteboard annotations

Holmquist, Lars, Sanneblad, Johan and Gaye, Lalya (2003) Total recall: in-place viewing of captured whiteboard annotations. In: CHI '03 extended abstracts on Human factors in computing systems - CHI '03. Association for Computing Machinery, pp. 980-981. ISBN 9781581136371

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Abstract

Total Recall introduces a new way to view captured whiteboard annotations. To digitize drawings we used a modified commercial system. However, instead of displaying the annotations on a separate computer screen, Total Recall shows the annotations at the place on the board where they were actually made. The user holds a hand-held computer to the board and moves it to reveal the desirable portion of the captured annotations. By using ultra-sonic positioning and optimized graphics, we achieve a high frame-rate (30 fps), allowing for very smooth panning and interaction. We argue that this way of viewing captured whiteboard annotations is more natural and intuitive than current desktop-based systems.

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