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Proceedings Paper

Comparison of microfacet BRDF model elements to diffraction BRDF model elements
Author(s): Samuel D. Butler; Stephen E. Nauyoks; Michael A. Marciniak
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Paper Abstract

A popular class of BRDF models is the microfacet model, where geometric optics is assumed, but where physical optics effects such as accurate wavelength scaling, important to Hyperspectral Imagery, are lost. More complex physical optics models may more accurately predict the BRDF, but the calculation is time-consuming. These seemingly disparate approaches are compared in detail. The linear systems direction cosine space is compared to microfacet coordinates, and the microfacet models Fresnel reflection in microfacet coordinates is compared to diffraction theory’s Fresnel-like term. Similarities and differences between these terms are highlighted to merge these two approaches to the BRDF.

Paper Details

Date Published: 21 May 2015
PDF: 11 pages
Proc. SPIE 9472, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXI, 94720C (21 May 2015); doi: 10.1117/12.2177221
Show Author Affiliations
Samuel D. Butler, Air Force Institute of Technology (United States)
Stephen E. Nauyoks, Air Force Institute of Technology (United States)
Michael A. Marciniak, Air Force Institute of Technology (United States)


Published in SPIE Proceedings Vol. 9472:
Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXI
Miguel Velez-Reyes; Fred A. Kruse, Editor(s)

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