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Research

My thesis research involves the evaluation of virtual rear projection (VRP). VRP is the use of multiple redundant front projectors to emulate a rear projected surface. VRP prevents blinding light from striking users, and eliminates shadows on the display. I have developed the PROCAMS Toolkit and used it to implement Virtual Rear Projection.

VRP is most useful for providing digital output for large scale interactive displays such as the BigBoard.
The final portion of my thesis involves the user evaluation of virtual rear projection.

Videos

This conference video Ubicomp 2003 - (320x240, 4min, 22MB, Quicktime5) gives an overview of virtual rear projection.
This video (6.5MB, DIVX avi) of our new switching demonstration, given at ICCV 2003 in Nice, France is our latest public technology demo.
Here is a 1 page demonstration explanation (PDF).
Video figure showing coping behaviors for front projection displays:
2003 - Virtual Rear Projection Study (320x240, 2min, 12MB, Quicktime5)

Divex.com has codecs and players available for MS Windows & Macintosh systems.

Virtual Rear Projection technology is being used to provide computer output capability for the BigBoard. The PROCAMS Toolkit includes code that makes the alignment and calibration of projectors for tasks such as VRP easy.

Other Projects

BurningWell a micro-controller based sensor that can locate itself within a projection beam. (Continued at MERL resulting in a siggraph publication.)
Detecting cameras and actively neutralizing them, producing a Capture Resistant Environment.
Using lasers and cameras for infrastructure free indoor positioning.

Advisors

References

Shadow Elimination and Blinding Light Suppression for Interactive Projected Displays
Jay Summet, Matthew Flagg, Tat-Jen Cham, James M. Rehg and Rahul Sukthankar.
IEEE Transactions on Visualization & Computer Graphics (TVCG), Volume 13, Number 3, May/June 2007. PDF Download (512Kb).
Also available as a GVU Technical Report GIT-GVU-06-01.

GVU-PROCAMS: Enabling novel projected interfaces.
Jay W. Summet, Matthew Flagg, James M. Rehg, Gregory D. Abowd, and Neil Weston.
Proceedings of ACM Multimedia, Santa Barbara, CA, USA. October 23-27 2006. PDF Download (368 Kb).

Virtual Rear Projection: Do Shadows Matter?
Jay Summet, Gregory D. Abowd, Gregory M. Corso, James M. Rehg.
CHI 2005 Extended Abstracts, p 1997-2000, Portland, Oregon, USA. PDF Download (254kb).

Shadow Elimination and Occluder Light Suppression for Multi-Projector Displays
T.J. Cham, J.M. Rehg, R. Sukthankar, G. Sukthankar.
Proceedings of CVPR 2003, pages 513-520.

Dynamic Shadow Elimination for Multi-Projector Displays
R. Sukthankar, T.J. Cham, G. Sukthankar.
Proceedings of CVPR 2001, pages 151-157.

Jay's Homepage > > Research