Title

Temporal radiance caching

Authors

Authors

P. Gautron; K. Bouatouch;S. Pattanaik

Comments

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Abbreviated Journal Title

IEEE Trans. Vis. Comput. Graph.

Keywords

global illumination; animation; temporal coherence; graphics processors; RADIOSITY; ENVIRONMENTS; ANIMATION; Computer Science, Software Engineering

Abstract

We present a novel method for fast high-quality computation of glossy global illumination in animated environments. Building on the irradiance caching and radiance caching algorithms, our method leverages temporal coherence by sparse temporal sampling and interpolation of the indirect lighting. In our approach, part of the global illumination solution computed in previous frames is reused in the current frame. Our reusing scheme adapts to the change of incoming radiance by updating the indirect lighting only where there is a significant change. By reusing data in several frames, our method removes the flickering artifacts and yields a significant speedup compared to classical computation in which a new cache is computed for every frame. We also define temporal gradients for smooth temporal interpolation. A key aspect of our method is the absence of any additional complex data structure, making the implementation into any existing renderer based on irradiance and radiance caching straightforward. We describe the implementation of our method using graphics hardware for improved performance.

Journal Title

Ieee Transactions on Visualization and Computer Graphics

Volume

13

Issue/Number

5

Publication Date

1-1-2007

Document Type

Article

Language

English

First Page

891

Last Page

901

WOS Identifier

WOS:000247893800004

ISSN

1077-2626

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