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Proceedings Paper

Hotspot mitigation in the StarCAVE
Author(s): Jordan Rhee; Jurgen Schulze; Thomas A. DeFanti
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Paper Abstract

Rear-projected screens such as those in Digital Light Projection (DLP) televisions suffer from an image quality problem called hot spotting, where the image is brightest at a point dependent on the viewing angle. In rear-projected mulit-screen configurations such as the StarCAVE at Calit2, this causes discontinuities in brightness at the edges where screens meet, and thus in the 3D image perceived by the user. In the StarCAVE we know the viewer's position in 3D space and we have programmable graphics hardware, so we can mitigate this effect by performing post-processing in the inverse of the pattern, yielding a homogenous image at the output. Our implementation improves brightness homogeneity by a factor of 4 while decreasing frame rate by only 1-3 fps.

Paper Details

Date Published: 27 January 2010
PDF: 12 pages
Proc. SPIE 7525, The Engineering Reality of Virtual Reality 2010, 752502 (27 January 2010); doi: 10.1117/12.839135
Show Author Affiliations
Jordan Rhee, Univ. of California, San Diego (United States)
Jurgen Schulze, Univ. of California, San Diego (United States)
Thomas A. DeFanti, Univ. of California, San Diego (United States)

Published in SPIE Proceedings Vol. 7525:
The Engineering Reality of Virtual Reality 2010
Ian E. McDowall; Margaret Dolinsky, Editor(s)

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