Accurate fitting of measured reflectances using a Shifted Gamma micro-facet distribution
نویسندگان
چکیده
منابع مشابه
Accurate fitting of measured reflectances using a Shifted Gamma micro-facet distribution
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 CookTorrance 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 challe...
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There are two different physical models connecting the micro-geometry of a surface and its physical reflectance properties (BRDF). The first, Cook-Torrance, assumes geometrical optics: light is reflected and masked by the micro-facets. In this model, the BRDF depends on the probability distribution of micro-facets normals. The second, Church-Takacs, assumes diffraction by the micro-geometry. In...
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ژورنال
عنوان ژورنال: Computer Graphics Forum
سال: 2012
ISSN: 0167-7055
DOI: 10.1111/j.1467-8659.2012.03147.x