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27 January 2010 Hotspot mitigation in the StarCAVE
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Proceedings Volume 7525, The Engineering Reality of Virtual Reality 2010; 752502 (2010)
Event: IS&T/SPIE Electronic Imaging, 2010, San Jose, California, United States
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.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jordan Rhee, Jurgen Schulze, and Thomas A. DeFanti "Hotspot mitigation in the StarCAVE", Proc. SPIE 7525, The Engineering Reality of Virtual Reality 2010, 752502 (27 January 2010);


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