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  Anisotropic Radiance-Cache Splatting for Efficiently Computing High-Quality Global Illumination with Lightcuts

Herzog, R., Myszkowski, K., & Seidel, H.-P. (2009). Anisotropic Radiance-Cache Splatting for Efficiently Computing High-Quality Global Illumination with Lightcuts. In M. Stamminger, & P. Dutré (Eds.), Computer Graphics Forum (Proc. EUROGRAPHICS) (pp. 259-268). Oxford, UK: Wiley-Blackwell.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-000F-1972-1 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-000F-1973-0
Genre: Conference Paper

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 Creators:
Herzog, Robert1, 2, Author           
Myszkowski, Karol1, Author           
Seidel, Hans-Peter1, Author           
Affiliations:
1Computer Graphics, MPI for Informatics, Max Planck Society, ou_40047              
2International Max Planck Research School, MPI for Informatics, Max Planck Society, ou_1116551              

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 Abstract: Computing global illumination in complex scenes is even with todays computational power a demanding task. In this work we propose a novel irradiance caching scheme that combines the advantages of two state-of-the-art algorithms for high-quality global illumination rendering: \emph{lightcuts}, an adaptive and hierarchical instant-radiosity based algorithm and the widely used (ir)radiance caching algorithm for sparse sampling and interpolation of (ir)radiance in object space. Our adaptive radiance caching algorithm is based on anisotropic cache splatting, which adapts the cache footprints not only to the magnitude of the illumination gradient computed with lightcuts but also to its orientation allowing larger interpolation errors along the direction of coherent illumination while reducing the error along the illumination gradient. Since lightcuts computes the direct and indirect lighting seamlessly, we use a two-layer radiance cache, to store and control the interpolation of direct and indirect lighting individually with different error criteria. In multiple iterations our method detects cache interpolation errors above the visibility threshold of a pixel and reduces the anisotropic cache footprints accordingly. We achieve significantly better image quality while also speeding up the computation costs by one to two orders of magnitude with respect to the well-known photon mapping with (ir)radiance caching procedure.

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Language(s): eng - English
 Dates: 2009-04-072009
 Publication Status: Issued
 Pages: -
 Publishing info: Oxford, UK : Wiley-Blackwell
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 520500
Other: Local-ID: C125675300671F7B-56F88E3A387C52D6C12575550034E328-Herzog2008
 Degree: -

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Title: Untitled Event
Place of Event: München, Germany
Start-/End Date: 2009-03-30 - 2009-04-03

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Title: Computer Graphics Forum (Proc. EUROGRAPHICS)
Source Genre: Proceedings
 Creator(s):
Stamminger, Marc1, Editor           
Dutré, Philip, Editor
Affiliations:
1 Computer Graphics, MPI for Informatics, Max Planck Society, ou_40047            
Publ. Info: Oxford, UK : Wiley-Blackwell
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 259 - 268 Identifier: -