Designing presentations for on-demand viewing
CSCW '00 Proceedings of the 2000 ACM conference on Computer supported cooperative work
Vision-Based Gesture Recognition: A Review
GW '99 Proceedings of the International Gesture Workshop on Gesture-Based Communication in Human-Computer Interaction
Visual panel: virtual mouse, keyboard and 3D controller with an ordinary piece of paper
Proceedings of the 2001 workshop on Perceptive user interfaces
Funky wall: presenting mood boards using gesture, speech and visuals
AVI '08 Proceedings of the working conference on Advanced visual interfaces
Turning lectures into comic books using linguistically salient gestures
AAAI'07 Proceedings of the 22nd national conference on Artificial intelligence - Volume 1
An interactive support tool to convey the intended message in asynchronous presentations
Proceedings of the International Conference on Advances in Computer Enterntainment Technology
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In this paper, we present an automatic system for analyzing and annotating video sequences of technical talks. Our method uses a robust motion estimation technique to detect key frames and segment the video sequence into subsequences containing a single overhead slide. The subsequences are stabilized to remove motion that occurs when the speaker adjusts their slides. Any changes remaining between frames in the stabilized sequences may be due to speaker gestures such as pointing or writing and we use active contours to automatically track these potential gestures. Given the constrained domain we define a simple ``vocabulary'' of actions which can easily be recognized based on the active contour shape and motion. The recognized actions provide a rich annotation of the sequence that can be used to access a condensed version of the talk from a web page.