Title

Radiance caching for efficient global illumination computation

Authors

Authors

J. Krivanek; P. Gautron; S. Pattanaik;K. Bouatouch

Comments

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Abbreviated Journal Title

IEEE Trans. Vis. Comput. Graph.

Keywords

global illumination; ray tracing; hemispherical harmonics; spherical; harmonics; directional distribution; Computer Science, Software Engineering

Abstract

In this paper, we present a ray tracing-based method for accelerated global illumination computation in scenes with low-frequency glossy BRDFs. The method is based on sparse sampling, caching, and interpolating radiance on glossy surfaces. In particular, we extend the irradiance caching scheme proposed by Ward et al. [1] to cache and interpolate directional incoming radiance instead of irradiance. The incoming radiance at a point is represented by a vector of coefficients with respect to a hemispherical or spherical basis. The surfaces suitable for interpolation are selected automatically according to the roughness of their BRDF. We also propose a novel method for computing translational radiance gradient at a point.

Journal Title

Ieee Transactions on Visualization and Computer Graphics

Volume

11

Issue/Number

5

Publication Date

1-1-2005

Document Type

Article

Language

English

First Page

550

Last Page

561

WOS Identifier

WOS:000230346800009

ISSN

1077-2626

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