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Reusing frames in camera animation

Rendering an animation in a global illumination framework is a very costly process. Each frame has to be computed with high accuracy to avoid both noise in a single frame and ickering from frame to frame. Recently an ef cient solution has been presented for camera animation, which reused the results computed in a frame for other frames via reprojection of the rst hits of primary rays. This solution, however, is biased since it does not take into account the different probability densities that generated the different contributions to a pixel. In this paper we present a correct, unbiased solution for frame reuse. We show how the different contributions can be combined into an unbiased solution using multiple importance sampling. The validity of our solution is tested with an animation using path-tracing technique, and the results are compared with both the classic independent approach and the previous unweighted, biased, solution

© Journal of WSCG, 2006, vol. 14, núm. 1-3, p.97-104

University of West Bohemia, Czech Republic

Author: Méndez Feliu, Àlex
Sbert, Mateu
Szirmay-Kalos, László
Date: 2006
Abstract: Rendering an animation in a global illumination framework is a very costly process. Each frame has to be computed with high accuracy to avoid both noise in a single frame and ickering from frame to frame. Recently an ef cient solution has been presented for camera animation, which reused the results computed in a frame for other frames via reprojection of the rst hits of primary rays. This solution, however, is biased since it does not take into account the different probability densities that generated the different contributions to a pixel. In this paper we present a correct, unbiased solution for frame reuse. We show how the different contributions can be combined into an unbiased solution using multiple importance sampling. The validity of our solution is tested with an animation using path-tracing technique, and the results are compared with both the classic independent approach and the previous unweighted, biased, solution
Format: application/pdf
ISSN: 1213-6972 (versió paper)
1213-6964 (versió electrònica)
Document access: http://hdl.handle.net/10256/9452
Language: eng
Publisher: University of West Bohemia, Czech Republic
Collection: Reproducció digital del document publicat a: http://wscg.zcu.cz/wscg2006/Papers_2006/Journal/!WSCG2006_Journal_Final.pdf
Articles publicats (D-IMA)
Is part of: © Journal of WSCG, 2006, vol. 14, núm. 1-3, p.97-104
Rights: Tots els drets reservats
Subject: Animació per ordinador
Computer animation
Title: Reusing frames in camera animation
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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