Accurate Fitting of Measured Reflectances Using a Shifted Gamma Micro-facet Distribution
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Date
2012
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association and Blackwell Publishing Ltd.
Abstract
Material models are essential to the production of photo-realistic images. Measured BRDFs provide accurate representation with complex visual appearance, but have larger storage cost. Analytical BRDFs such as Cook- Torrance provide a compact representation but fail to represent the effects we observe with measured appearance. Accurately fitting an analytical BRDF to measured data remains a challenging problem. In this paper we introduce the SGD micro-facet distribution for Cook-Torrance BRDF. This distribution accurately models the behavior of most materials. As a consequence, we accurately represent all measured BRDFs using a single lobe. Our fitting procedure is stable and robust, and does not require manual tweaking of the parameters.
Description
@article{10.1111:j.1467-8659.2012.03147.x,
journal = {Computer Graphics Forum},
title = {{Accurate Fitting of Measured Reflectances Using a Shifted Gamma Micro-facet Distribution}},
author = {Bagher, Mohammad Mahdi and Soler, Cyril and Holzschuch, Nicolas},
year = {2012},
publisher = {The Eurographics Association and Blackwell Publishing Ltd.},
ISSN = {1467-8659},
DOI = {10.1111/j.1467-8659.2012.03147.x}
}