A Real Time Light Probe
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Date
2004
Journal Title
Journal ISSN
Volume Title
Publisher
Eurographics Association
Abstract
We present a novel system capable of capturing high dynamic range (HDR) Light Probes at video speed. Each Light Probe frame is built from an individual full set of exposures, all of which are captured within the frame time. The exposures are processed and assembled into a mantissa-exponent representation image within the camera unit before output, and then streamed to a standard PC. As an example, the system is capable of capturing Light Probe Images with a resolution of 512x512 pixels using a set of 10 exposures covering 15 f-stops at a frame rate of up to 25 final HDR frames per second. The system is built around commercial special-purpose camera hardware with on-chip programmable image processing logic and tightly integrated frame buffer memory, and the algorithm is implemented as custom downloadable microcode software.
Description
@inproceedings{10.2312:egs.20041022,
booktitle = {Eurographics 2004 - Short Presentations},
editor = {M. Alexa and E. Galin},
title = {{A Real Time Light Probe}},
author = {Unger, Jonas and Gustavson, Stefan and Ollila, M. and Johannesson, M.},
year = {2004},
publisher = {Eurographics Association},
ISSN = {1017-4656},
ISBN = {},
DOI = {10.2312/egs.20041022}
}