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Steady-State Feedback Analysis of Tele-Graffiti
N. Takao, S. Baker, and J. Shi
Proceedings of the IEEE International Workshop on Projector-Camera Systems, October, 2003.

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We analyze the feedback loop in Tele-Graffiti, a camera-projector based remote sketching system which we recently developed. We derive the gain through the feedback loop and the final images that will be viewed by the users of the system. We then derive the ``optimal gain'' as the gain that results in the final viewed images being as close as possible to the sum of the images actually drawn on the paper. We also propose a way of using the projector to compensate for insufficient ambient light and describe how our analysis is affected by: (1) automatic gain control (AGC) and (2) color imagery. We end by proposing an algorithm to decompose the final viewed images into estimates of the drawn images.

Associated center: VASC
Associated lab/group: Intelligent Desktop Group
Associated project: Tele-Graffiti

N. Takao, S. Baker, and J. Shi, "Steady-State Feedback Analysis of Tele-Graffiti," Proceedings of the IEEE International Workshop on Projector-Camera Systems, October, 2003.

@inproceedings{Takao_2003_4472,
   author = "Naoya Takao and Simon Baker and Jianbo Shi",
   title = "Steady-State Feedback Analysis of Tele-Graffiti",
   booktitle = "Proceedings of the IEEE International Workshop on Projector-Camera Systems",
   month = "October",
   year = "2003"
}