Title:	Optimizing path tracing using noise reduction filters
Authors:	Jensen, Henrik Wann Christensen, Niels Jørgen
Citation:	Journal of WSCG. 1995, vol. 3, no. 1-2, p. 134-142.
Issue Date:	1995
Publisher:	Václav Skala - UNION Agency
Document type:	článek article
URI:	http://wscg.zcu.cz/wscg1995/wscg95.htm http://hdl.handle.net/11025/16029
ISSN:	1213-6972 (print) 1213-6980 (CD-ROM) 1213-6964 (online)
Keywords:	globální osvětlení;trasování cesty;snížení hluku;filtrace
Keywords in different language:	global illumination;path tracing;noise reduction;filtration
Abstract in different language:	The problem of global illumination can be solved using path tracing. Unfortunately path tracing gives very noisy images. This noise is mostly caused by the indirect illumination reflected diffusely. The common way to reduce the noise is to use more samples/rays pr. pixel. However, the convergence speed in path tracing makes this strategy very costly. In this paper we propose a technique in which light reflected diffusely two times is separated from the final solution. This light is filtered by different noise reduction filtres and then added to the remaining solution. In this way we avoid blurring the image and the the same time we are able to reduce the noise level significantly.
Rights:	© Václav Skala - UNION Agency
Appears in Collections:	Volume 3, number 1-2 (1995)

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