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          Institute: MPI für Informatik     Collection: Computer Graphics Group     Display Documents



ID: 202153.0, MPI für Informatik / Computer Graphics Group
Accelerating Path Tracing by re-using Paths
Authors:Bekaert, Philippe; Sbert, Mateu; Halton, John
Editors:Debevec, Paul; Gibson, Simon
Language:English
Publisher:Eurographics
Place of Publication:Aire-la-Ville, Switzerland
Date of Publication (YYYY-MM-DD):2002
Title of Proceedings:Rendering Techniques 2002
Start Page:124
End Page:135
Place of Conference/Meeting:Pisa, Italy
(Start) Date of Conference/Meeting
 (YYYY-MM-DD):
2002-06-26
Review Status:not specified
Audience:Experts Only
Intended Educational Use:No
Abstract / Description: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.
Last Change of the Resource (YYYY-MM-DD):2003-09-02
External Publication Status:published
Document Type:Conference-Paper
Communicated by:Hans-Peter Seidel
Affiliations:MPI für Informatik/Computer Graphics Group
Identifiers:LOCALID:C125675300671F7B-4D7C5B1D238D67FBC1256BCA003B5297-...
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