Using Reflectors for Analysis and Acquisition of Anisotropic BRDF

0462402 - ÚTIA 2017 RIV AT eng C - Conference Paper (international conference)
Filip, Jiří - Vávra, Radomír
Using Reflectors for Analysis and Acquisition of Anisotropic BRDF.
Proceedings of the 4th CIE Expert Symposium on Colour and Visual Appearance. Vienna: Commission Internationale de L'Eclairage CIE Central Bureau, 2016, s. 155-162. ISBN 978-3-902842-59-6.
[The 4th CIE Expert Symposium on Colour and Visual Appearance. Praha (CZ), 06.09.2016-07.09.2016]
R&D Projects: GA ČR(CZ) GA14-02652S
Institutional support: RVO:67985556
Keywords : BRDF measurement * anisotropic * reflector * ellipsoidal * parabolic
Subject RIV: BD - Theory of Information
http://library.utia.cas.cz/separaty/2016/RO/filip-0462402.pdf

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 describes approaches to BRDF analysis and acquisition using ellipsoidal and parabolic reflectors commonly used for in illumination industry. First, we show how reflectors can be used for detection of anisotropic properties as anisotropic axes and highlight width. Second, we outline and approach for anisotropic BRDF capture using reflector that allows fast and convenient measurement without need of measured sample extraction.
Permanent Link: http://hdl.handle.net/11104/0262343