TouchLight: an imaging touch screen and display for gesture-based interaction

  • Authors:
  • Andrew D. Wilson

  • Affiliations:
  • Microsoft Research, Redmond, WA

  • Venue:
  • Proceedings of the 6th international conference on Multimodal interfaces
  • Year:
  • 2004

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Abstract

A novel touch screen technology is presented. TouchLight uses simple image processing techniques to combine the output of two video cameras placed behind a semi-transparent plane in front of the user. The resulting image shows objects that are on the plane. This technique is well suited for application with a commercially available projection screen material (DNP HoloScreen) which permits projection onto a transparent sheet of acrylic plastic in normal indoor lighting conditions. The resulting touch screen display system transforms an otherwise normal sheet of acrylic plastic into a high bandwidth input/output surface suitable for gesture-based interaction. Image processing techniques are detailed, and several novel capabilities of the system are outlined.