Center for Human Modeling and Simulation

Document Type

Journal Article

Date of this Version

December 1996

Comments

Copyright 1996 IEEE. Reprinted from IEEE Transactions on Visualization and Computer Graphics, Volume 2, Issue 4, December 1996, pages 283-298.

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Abstract

We describe a new framework for efficiently computing and storing global illumination effects for complex, animated environments. The new framework allows the rapid generation of sequences representing any arbitrary path in a "view space" within an environment in which both the viewer and objects move. The global illumination is stored as time sequences of range-images at base locations that span the view space. We present algorithms for determining locations for these base images, and the time steps required to adequately capture the effects of object motion. We also present algorithms for computing the global illumination in the base images that exploit spatial and temporal coherence by considering direct and indirect illumination separately. We discuss an initial implementation using the new framework. Results and analysis of our implementation demonstrate the effectiveness of the individual phases of the approach; we conclude with an application of the complete framework to a complex environment that includes object motion.

Keywords

animation, global illumination, image-based rendering, radiosity, ray tracing, walk-throughs.

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Date Posted: 18 July 2007

This document has been peer reviewed.