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Plane Parallel Radiance Transport for Global Illumination in Vegetation
Nelson Max1; Curtis Mobley2; Brett Keating1; En-Hua Wu3
1997-01-05
Conference NameSpecial Interest Group on Computer Graphics
Source PublicationRendering Techniques ’97
Pages239-250
Conference DateAugust 3-8,1997
Conference PlaceLos Angeles, CA
PublisherSpringer
Abstract

This paper applies plane parallel radiance transport techniques to scattering from vegetation. The leaves, stems, and branches are represented as a volume density of scattering surfaces, depending only on height and the vertical component of the surface normal. Ordinary differential equations are written for the multiply scattered radiance as a function of the height above the ground, with the sky radiance and ground reflectance as boundary conditions. They are solved using a two-pass integration scheme to unify the two-point bounday conditions, and Fourier series for the dependence on the azimuthal angle. The resulting radiance distribution is used to precompute diffuse and specular “ambient” shading tables, as a function of height and surface normal, to be used in rendering, together with a z-buffer shadow algorithm for direct solar illumination.

DOIhttps://doi.org/10.1007/978-3-7091-6858-5_22
Language英语
Fulltext Access
Citation statistics
Document TypeConference paper
CollectionDEPARTMENT OF COMPUTER AND INFORMATION SCIENCE
Faculty of Science and Technology
Affiliation1.Lawrence Livermore National Laboratory and U. C. Davis
2.Sequoia Scientific ,USA
3.Institute of Software, Academia Sinica
Recommended Citation
GB/T 7714
Nelson Max,Curtis Mobley,Brett Keating,et al. Plane Parallel Radiance Transport for Global Illumination in Vegetation[C]:Springer,1997:239-250.
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