Implementing phicons: combining computer vision with infrared technology for interactive physical icons

  • Authors:
  • Darnell J. Moore;Roy Want;Beverly L. Harrison;Anuj Gujar;Ken Fishkin

  • Affiliations:
  • Center for Signal & Image Processing, Georgia Institute of Technology, Atlanta, Georgia;Xerox PARC, 3333 Coyote Hill Road, Palo Alto, CA;Xerox PARC, 3333 Coyote Hill Road, Palo Alto, CA;Xerox PARC, 3333 Coyote Hill Road, Palo Alto, CA;Xerox PARC, 3333 Coyote Hill Road, Palo Alto, CA

  • Venue:
  • Proceedings of the 12th annual ACM symposium on User interface software and technology
  • Year:
  • 1999

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Abstract

This paper describes a novel physical icon [3] (“phicon”) based system that can be programmed to issue a range of commands about what the user wishes to do with handdrawn whiteboard content. Through the phicon's UI, a command to process whiteboard context is issued using infrared signaling in combination with image processing and a ceiling-mounted camera system. We leverage camera systems that are already used for capturing whiteboard content [4] by further augmenting these systems to detect the presence and location of IR beacons within an image. An HDLC-based protocol and a built-in IR transmitter are used to send these signals.