Sparsely Precomputing The Light Transport Matrix for Real-Time Rendering.
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| Title: | Sparsely Precomputing The Light Transport Matrix for Real-Time Rendering. |
|---|---|
| Authors: | Fu-Chung Huang1 jonash@cs.berkeley.edu, Ramamoorthi, Ravi1 ravir@cs.berkeley.edu |
| Source: | Computer Graphics Forum. Jun2010, Vol. 29 Issue 4, p1335-1345. 11p. 11 Illustrations, 3 Diagrams, 5 Charts, 2 Graphs. |
| Subjects: | Real-time rendering (Computer graphics), Interactive computer graphics, Principal components analysis, Wavelets (Mathematics), Ray tracing algorithms, Rapid prototyping, Light transmission, Interpolation |
| Abstract: | Precomputation-based methods have enabled real-time rendering with natural illumination, all-frequency shadows, and global illumination. However, a major bottleneck is the precomputation time, that can take hours to days. While the final real-time data structures are typically heavily compressed with clustered principal component analysis and/or wavelets, a full light transport matrix still needs to be precomputed for a synthetic scene, often by exhaustive sampling and raytracing. This is expensive and makes rapid prototyping of new scenes prohibitive. In this paper, we show that the precomputation can be made much more efficient by adaptive and sparse sampling of light transport. We first select a small subset of “dense vertices”, where we sample the angular dimensions more completely (but still adaptively). The remaining “sparse vertices” require only a few angular samples, isolating features of the light transport. They can then be interpolated from nearby dense vertices using locally low rank approximations. We demonstrate sparse sampling and precomputation 5 × faster than previous methods. [ABSTRACT FROM AUTHOR] |
| Copyright of Computer Graphics Forum is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 52975061 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Sparsely Precomputing The Light Transport Matrix for Real-Time Rendering. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Fu-Chung+Huang%22">Fu-Chung Huang</searchLink><relatesTo>1</relatesTo><i> jonash@cs.berkeley.edu</i><br /><searchLink fieldCode="AR" term="%22Ramamoorthi%2C+Ravi%22">Ramamoorthi, Ravi</searchLink><relatesTo>1</relatesTo><i> ravir@cs.berkeley.edu</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Computer+Graphics+Forum%22">Computer Graphics Forum</searchLink>. Jun2010, Vol. 29 Issue 4, p1335-1345. 11p. 11 Illustrations, 3 Diagrams, 5 Charts, 2 Graphs. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Real-time+rendering+%28Computer+graphics%29%22">Real-time rendering (Computer graphics)</searchLink><br /><searchLink fieldCode="DE" term="%22Interactive+computer+graphics%22">Interactive computer graphics</searchLink><br /><searchLink fieldCode="DE" term="%22Principal+components+analysis%22">Principal components analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Wavelets+%28Mathematics%29%22">Wavelets (Mathematics)</searchLink><br /><searchLink fieldCode="DE" term="%22Ray+tracing+algorithms%22">Ray tracing algorithms</searchLink><br /><searchLink fieldCode="DE" term="%22Rapid+prototyping%22">Rapid prototyping</searchLink><br /><searchLink fieldCode="DE" term="%22Light+transmission%22">Light transmission</searchLink><br /><searchLink fieldCode="DE" term="%22Interpolation%22">Interpolation</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Precomputation-based methods have enabled real-time rendering with natural illumination, all-frequency shadows, and global illumination. However, a major bottleneck is the precomputation time, that can take hours to days. While the final real-time data structures are typically heavily compressed with clustered principal component analysis and/or wavelets, a full light transport matrix still needs to be precomputed for a synthetic scene, often by exhaustive sampling and raytracing. This is expensive and makes rapid prototyping of new scenes prohibitive. In this paper, we show that the precomputation can be made much more efficient by adaptive and sparse sampling of light transport. We first select a small subset of “dense vertices”, where we sample the angular dimensions more completely (but still adaptively). The remaining “sparse vertices” require only a few angular samples, isolating features of the light transport. They can then be interpolated from nearby dense vertices using locally low rank approximations. We demonstrate sparse sampling and precomputation 5 × faster than previous methods. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Computer Graphics Forum is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1111/j.1467-8659.2010.01729.x Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 11 StartPage: 1335 Subjects: – SubjectFull: Real-time rendering (Computer graphics) Type: general – SubjectFull: Interactive computer graphics Type: general – SubjectFull: Principal components analysis Type: general – SubjectFull: Wavelets (Mathematics) Type: general – SubjectFull: Ray tracing algorithms Type: general – SubjectFull: Rapid prototyping Type: general – SubjectFull: Light transmission Type: general – SubjectFull: Interpolation Type: general Titles: – TitleFull: Sparsely Precomputing The Light Transport Matrix for Real-Time Rendering. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Fu-Chung Huang – PersonEntity: Name: NameFull: Ramamoorthi, Ravi IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 06 Text: Jun2010 Type: published Y: 2010 Identifiers: – Type: issn-print Value: 01677055 Numbering: – Type: volume Value: 29 – Type: issue Value: 4 Titles: – TitleFull: Computer Graphics Forum Type: main |
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