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Proceedings Paper

Grazing angle experimental analysis of modification to microfacet BRDF model for improved accuracy
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Paper Abstract

The BRDF describes optical scatter off realistic surfaces. The microfacet BRDF model assumes geometric optics but is computationally simple compared to wave optics models. Previously, densely-sampled MERL BRDF data for several materials was analyzed using a novel variation of a microfacet BRDF that used a polarization factor in place of the cross section conversion and geometric attenuation terms, demonstrating improved accuracy. This paper extends that analysis to examine high-fidelity grazing angle BRDF data measured in-plane with the novel BRDF modification. Results indicate that for many materials the novel BRDF modification is more accurate than the Traditional Cook-Torrance BRDF at near grazing angles. We show as much as an order of magnitude improvement in the fit error using this novel BRDF modification. These results are expected to lead to more accurate BRDF modeling for remote sensing, computer graphics, and scene generation.

Paper Details

Date Published: 8 May 2018
PDF: 14 pages
Proc. SPIE 10644, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXIV, 106441I (8 May 2018); doi: 10.1117/12.2303744
Show Author Affiliations
Becca E. Ewing, Wright State Univ. (United States)
Samuel D. Butler, Air Force Institute of Technology (United States)


Published in SPIE Proceedings Vol. 10644:
Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXIV
Miguel Velez-Reyes; David W. Messinger, Editor(s)

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