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Proceedings Paper

Empirical bidirectional reflectivity model
Author(s): Mark A. Culpepper
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Paper Abstract

Several mathematical models for the bidirectional reflectivity distribution function (BRDF) are compared to plane-of-incidence (PLIN), BRDF measurements of opaque surfaces. A laser at 0.6328 micrometers wavelength was the source for the BRDF measurement instrument; the theoretical measurement accuracy was to within 2%. Data are given for a glossy white paint, a glossy black paint, and a mill finished aluminum. The goal was to find a BRDF model that can represent the measured data to within 10% for any incident/reflected angle. Neither the Lambertian, Phong, Harvey, nor Cook-Torrance models had the desired accuracy for the three samples. A method which is based on interpolation and extrapolation of the empirical data is proposed which may achieve the desired goal both in and out of the PLIN.

Paper Details

Date Published: 2 June 1995
PDF: 12 pages
Proc. SPIE 2469, Targets and Backgrounds: Characterization and Representation, (2 June 1995); doi: 10.1117/12.210592
Show Author Affiliations
Mark A. Culpepper, Air Force Phillips Lab. (United States)


Published in SPIE Proceedings Vol. 2469:
Targets and Backgrounds: Characterization and Representation
Wendell R. Watkins; Dieter Clement, Editor(s)

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