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.
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@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
} }
Citation