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      • University of Waikato Research
      • Computing and Mathematical Sciences
      • Computer Science Working Paper Series
      • 2002 Working Papers
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      •   Research Commons
      • University of Waikato Research
      • Computing and Mathematical Sciences
      • Computer Science Working Paper Series
      • 2002 Working Papers
      • View Item
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      Use of video shadow for small group interaction awareness on a large interactive display surface

      Apperley, Mark; McLeod, Laurie; Masoodian, Masood; Paine, Lance; Phillips, Malcolm; Rogers, Bill; Thomson, Kirsten
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      Apperly, M., McLeod, L., Masoodian, M., Paine, L., Phillips, M., Rogers, B. & Thomson, K. (2002). Use of video shadow for small group interaction awareness on a large interactive display surface. (Working paper 07/02). Hamilton, New Zealand: University of Waikato, Department of Computer Science.
      Permanent Research Commons link: https://hdl.handle.net/10289/1015
      Abstract
      This paper reports work done as part of the Large Interactive Display Surface (LIDS) project at the University of Waikato. One application of the LIDS equipment is distributed meeting support. In this context large display surfaces are used as shared workspaces by people at collaborating sites. A meeting with start with a shared presentation document, typically and agenda document with summary and detail on agenda items as required. During the meeting, annotations with be made on the shared document, and new pages will be added with notes and drawings.

      To prevent access collisions and generally mediate use of the shared space, mechanisms to provide awareness of actions of people at other sites are required. In our system a web camera is used to capture a low-resolution image of the person/people near the board on each side. Rather than transmit the image directly we computed a shadow/silhouette. The shadow is displayed behind other screen content. This provides awareness of position and impending write actions and allows intentional pointing to locations of the screen. It also has the advantage of being transmitted with low bandwidth, being relatively insensitive to low frame rates, and minimizing visual interference with substantive data being displayed on the screen.
      Date
      2002-07
      Type
      Working Paper
      Series
      Computer Science Working Papers
      Report No.
      07/02
      Publisher
      University of Waikato, Department of Computer Science
      Collections
      • 2002 Working Papers [12]
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