BRDF Measurement Modelling using Wavelets for Efficient Path Tracing

dc.contributor.authorClaustres, L.en_US
dc.contributor.authorPaulin, M.en_US
dc.contributor.authorBoucher, Y.en_US
dc.date.accessioned2014-07-29T13:41:55Z
dc.date.available2014-07-29T13:41:55Z
dc.date.issued2003en_US
dc.description.abstractPhysically based rendering needs numerical models from real measurements, or analytical models from material definitions, of the Bidirectional Reflectance Distribution Function (BRDF). However, measured BRDF data sets are too large and provide no functionalities to be practically used in Monte Carlo path tracing algorithms. In this paper, we present a wavelet-based generic BRDF model suitable for both physical analysis and path tracing. The model is based on the separation of spectral and geometrical aspect of the BRDF and allows a compact and efficient representation of isotropic, anisotropic and/or spectral BRDFs. After a brief survey of BRDF and wavelet theory, we present our software architecture for generic wavelet transform and how to use it to model BRDFs. Then, modelling results are presented on real and virtual BRDF measurements. Finally, we show how to exploit the multiresolution property of the wavelet encoding to reduce the variance by importance sampling in a path tracing algorithm.ACM CSS: I.3.7 Computer Graphics-Three-Dimensional Graphics and Realismen_US
dc.description.number4en_US
dc.description.seriesinformationComputer Graphics Forumen_US
dc.description.volume22en_US
dc.identifier.doi10.1111/j.1467-8659..00718.xen_US
dc.identifier.issn1467-8659en_US
dc.identifier.urihttps://doi.org/10.1111/j.1467-8659..00718.xen_US
dc.publisherBlackwell Publishing, Inc and Eurographics Associationen_US
dc.titleBRDF Measurement Modelling using Wavelets for Efficient Path Tracingen_US
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