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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

Autor: Méndez Feliu, Àlex
Sbert, Mateu
Szirmay-Kalos, László
Data: 2006
Resum: 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)
Accés al document: http://hdl.handle.net/10256/9452
Llenguatge: eng
Editor: University of West Bohemia, Czech Republic
Col·lecció: Reproducció digital del document publicat a: http://wscg.zcu.cz/wscg2006/Papers_2006/Journal/!WSCG2006_Journal_Final.pdf
Articles publicats (D-IMA)
És part de: © Journal of WSCG, 2006, vol. 14, núm. 1-3, p.97-104
Drets: Tots els drets reservats
Matèria: Animació per ordinador
Computer animation
Títol: Reusing frames in camera animation
Tipus: info:eu-repo/semantics/article
Repositori: DUGiDocs

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