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Carnegie Mellon Robotics Institute

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Abstract

One way to build a remote sketching system is to use a video camera to image what each user draws at their site, transmit the video to the other sites, and display it there using an LCD projector. Such camera-projector based remote sketching systems date back to Paul Wellner's (largely unimplemented) Xerox Double DigitalDesk. To make such a system usable, however, the users have to be able to move the paper on which they are drawing, they have to be able to interact with the system using a convenient interface, and sketching sessions must be stored in a compact format so that they can be replayed later. We have recently developed Tele-Graffiti, a remote sketching system with the following three features: (1) real-time paper tracking to allow the users to move their paper during system operation, (2) a hand based user interface, and (3) automatic session summarization and playback. In this paper, we describe the design, implementation, and performance of Tele-Graffiti.

Keywords

Camera-projector based remote sketching systems, remote communicationand collaboration, video compression and transmission, paper detectionand tracking, hand-based user interfaces, automatic summarization,archiving, and playback.

Notes

Associated Center(s) / Consortia: Vision and Autonomous Systems Center

Associated Lab(s) / Group(s): Intelligent Desktop Group

Associated Project(s): Tele-Graffiti

Number of pages: 19

Text Reference

Naoya Takao, Jianbo Shi, and Simon Baker, "Tele-Graffiti: A Camera-Projector Based Remote Sketching System with Hand-Based User Interface and Automatic Session Summarization," International Journal of Computer Vision, Vol. 53, No. 2, July, 2003, pp. 115 - 133.

BibTeX Reference

@article{Takao_2003_4194,
   author = "Naoya Takao and Jianbo Shi and Simon Baker",
   title = "Tele-Graffiti: A Camera-Projector Based Remote Sketching System with Hand-Based User Interface and Automatic Session Summarization",
   journal = "International Journal of Computer Vision",
   pages = "115 - 133",
   month = "July",
   year = "2003",
   volume = "53",
   number = "2",
}

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