Shadow reaching: a new perspective on interaction for large displays

ABSTRACT

We introduce Shadow Reaching, an interaction technique that makes use of a perspective projection applied to a shadow representation of a user. The technique was designed to facilitate manipulation over large distances and enhance understanding in collaborative settings. We describe three prototype implementations that illustrate the technique, examining the advantages of using shadows as an interaction metaphor to support single users and groups of collaborating users. Using these prototypes as a design probe, we discuss how the three components of the technique (sensing, modeling, and rendering) can be accomplished with real (physical) or computed (virtual) shadows, and the benefits and drawbacks of each approach.

REFERENCES

• 1: Mark Apperley , Laurie McLeod , Masood Masoodian , Lance Paine , Malcolm Phillips , Bill Rogers , Kirsten Thomson, Use of video shadow for small group interaction awareness on a large interactive display surface, Proceedings of the Fourth Australasian user interface conference on User interfaces 2003, p.81-90, February 01, 2003, Adelaide, Australia
• 2: Eric A. Bier , Maureen C. Stone , Ken Pier , William Buxton , Tony D. DeRose, Toolglass and magic lenses: the see-through interface, Proceedings of the 20th annual conference on Computer graphics and interactive techniques, p.73-80, September 1993 [doi>10.1145/166117.166126]
• 3: Maxime Collomb , Mountaz Hascoët , Patrick Baudisch , Brian Lee, Improving drag-and-drop on wall-size displays, Proceedings of Graphics Interface 2005, May 09-11, 2005, Victoria, British Columbia
• 4: Davis, J. and Bobick, A. (1998). Virtual PAT: a virtual personal aerobics trainer. Workshop on Perceptual User Interfaces, 13--18.
• 5: Carl Gutwin , Saul Greenberg, A Descriptive Framework of Workspace Awareness for Real-Time Groupware, Computer Supported Cooperative Work, v.11 n.3, p.411-446, 2002 [doi>10.1023/A:1021271517844 ]
• 6: Hascoet, M. (2003). Throwing models for large displays, HCI 2003, Volume 2, 73--77.
• 7: Azam Khan , George Fitzmaurice , Don Almeida , Nicolas Burtnyk , Gordon Kurtenbach, A remote control interface for large displays, Proceedings of the 17th annual ACM symposium on User interface software and technology, October 24-27, 2004, Santa Fe, NM, USA [doi>10.1145/1029632.1029655]
• 8: Myron W. Krueger , Thomas Gionfriddo , Katrin Hinrichsen, VIDEOPLACE—an artificial reality, Proceedings of the SIGCHI conference on Human factors in computing systems, p.35-40, April 1985, San Francisco, California, United States
• 9: Parker, J.K., Mandryk, R., Nunes, M., and Inkpen, K. (2005). TractorBeam selection aids: improving target acquisition for pointing input on tabletop displays. Proc. INTERACT 2005, 80--93.
• 10: Adrian Reetz , Carl Gutwin , Tadeusz Stach , Miguel Nacenta , Sriram Subramanian, Superflick: a natural and efficient technique for long-distance object placement on digital tables, Proceedings of Graphics Interface 2006, June 07-09, 2006, Quebec, Canada
• 11: Jun Rekimoto, Pick-and-drop: a direct manipulation technique for multiple computer environments, Proceedings of the 10th annual ACM symposium on User interface software and technology, p.31-39, October 14-17, 1997, Banff, Alberta, Canada [doi>10.1145/263407.263505]
• 12: Stacey D. Scott , Karen D. Grant , Regan L. Mandryk, System guidelines for co-located, collaborative work on a tabletop display, Proceedings of the eighth conference on European Conference on Computer Supported Cooperative Work, p.159-178, September 14-18, 2003, Helsinki, Finland
• 13: Desney S. Tan , Randy Pausch, Pre-emptive shadows: eliminating the blinding light from projectors, CHI '02 extended abstracts on Human factors in computing systems, April 20-25, 2002, Minneapolis, Minnesota, USA [doi>10.1145/506443.506544]
• 14: Utterback, C. and Achituv, R. (2002). Text Rain. SIGGRAPH Electronic Art and Animation Catalog, 78.
• 15: Mike Wu , Ravin Balakrishnan, Multi-finger and whole hand gestural interaction techniques for multi-user tabletop displays, Proceedings of the 16th annual ACM symposium on User interface software and technology, p.193-202, November 02-05, 2003, Vancouver, Canada [doi>10.1145/964696.964718]

INDEX TERMS

Primary Classification:
  H. Information Systems
  H.5 INFORMATION INTERFACES AND PRESENTATION (I.7)
      H.5.2 User Interfaces (D.2.2, H.1.2, I.3.6)
          Subjects: Graphical user interfaces (GUI)

General Terms:
Design, Human Factors

Keywords:
interaction techniques, large displays