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Minimal Sampling for Effective Acquisition of Anisotropic BRDFs
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SYSNO ASEP 0463872 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Minimal Sampling for Effective Acquisition of Anisotropic BRDFs Author(s) Vávra, Radomír (UTIA-B) RID, ORCID
Filip, Jiří (UTIA-B) RID, ORCIDNumber of authors 2 Source Title Computer Graphics Forum. - : Wiley - ISSN 0167-7055
Roč. 35, č. 7 (2016), s. 299-309Number of pages 11 s. Publication form Medium - C Language eng - English Country GB - United Kingdom Keywords BRDF ; anisotropic ; measurement Subject RIV BD - Theory of Information R&D Projects GA14-02652S GA ČR - Czech Science Foundation (CSF) Institutional support UTIA-B - RVO:67985556 UT WOS 000388497400031 EID SCOPUS 84992640392 DOI 10.1111/cgf.13027 Annotation BRDFs are commonly used for material appearance representation in applications ranging from gaming and the movie industry, to product design and specification. Most applications rely on isotropic BRDFs due to their better availability as a result of their easier acquisition process. On the other hand, anisotropic BRDF due to their structure-dependent anisotropic highlights, are more challenging to measure and process. This paper thus leverages the measurement process of anisotropic BRDF by representing such BRDF by the collection of isotropic BRDFs. Our method relies on an anisotropic BRDF database decomposition into training isotropic slices forming a linear basis, where appropriate sparse samples are identified using numerical optimization. When an unknown anisotropic BRDF is measured, these samples are repeatably captured in a small set of azimuthal directions. Workplace Institute of Information Theory and Automation Contact Markéta Votavová, votavova@utia.cas.cz, Tel.: 266 052 201. Year of Publishing 2017
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