Fast GPU-based Visibility Computation for Natural Illumination of Volume Data Sets
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Date
2007
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association
Abstract
Pre-computed radiance transfer (PRT) has been used to render volumetric data under distant low-frequency illumination at real-time rates, including natural illumination, soft shadows, attenuation from semi-transparent occluders and multiple scattering. PRT requires a lengthy pre-process, which is acceptable only for static volume data. However, in practical volume rendering, general transfer functions are used. Manipulating such a transfer function will result in a dynamic radiance transfer which has to be re-computed. This work proposes a fast way for this re-computation. While previous work has used CPU Monte Carlo ray-tracing for pre-computation and requires time in the order of many minutes, our GPU implementation uses a hierarchical visibility approximation implemented entirely on the GPU and requires only a few seconds for typical scenes.
Description
@inproceedings{10.2312:egs.20071033,
booktitle = {EG Short Papers},
editor = {Paolo Cignoni and Jiri Sochor},
title = {{Fast GPU-based Visibility Computation for Natural Illumination of Volume Data Sets}},
author = {Ritschel, Tobias},
year = {2007},
publisher = {The Eurographics Association},
ISBN = {},
DOI = {10.2312/egs.20071033}
}