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キーワード:
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要旨:
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.
