Accelerating Path Tracing by Re-Using Paths

Bekaert, Philippe; Sbert, Mateu; Halton, John

Accelerating Path Tracing by Re-Using Paths

Files

125-134.pdf (1.88 MB)

bekaert_colorpage.pdf (1.21 MB)

Date

2002

Authors

Bekaert, Philippe
Sbert, Mateu
Halton, John

Publisher

The Eurographics Association

Abstract

This paper describes a new acceleration technique for rendering algorithms like path tracing, that use so called gathering random walks. Usually in path tracing, each traced path is used in order to compute a contribution to only a single point on the virtual screen. We propose to combine paths traced through nearby screen points in such a way that each path contributes to multiple screen points in a provably good way. Our approach is unbiased and is not restricted to diffuse light scattering. It complements previous image noise reduction techniques for Monte Carlo ray tracing. We observe speed-ups in the computation of indirect illumination of one order of magnitude.

        @inproceedings{10.2312:EGWR/EGWR02/125-134
,
booktitle = {Eurographics Workshop on Rendering
},
editor = {P. Debevec and S. Gibson
},
title = {{Accelerating Path Tracing by Re-Using Paths
}},
author = {Bekaert, Philippe and 
Sbert, Mateu and 
Halton, John
},
year = {2002
},
publisher = {The Eurographics Association
},
ISSN = {1727-3463
},
ISBN = {1-58113-534-3
},
DOI = {10.2312/EGWR/EGWR02/125-134
}
}