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A General BRDF/BSDF Model Including Out-of-Plane Dependence

机译:包含平面依赖性的通用BRDF / BSDF模型

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A semi-empirical reflectance/scatterance model has evolved over the years to represent a diverse set of materials from coated substrates to optical windows. This model separates the BRDF/BSDF into four basic components, specular, near-specular, diffuse, and Lambertian (random diffuse) terms. The specular and near-specular components employ a Gaussian phase function and the Fresnel power reflection coefficient. The Lambertian component uses Kubelka-Munk theory for the total integrated reflectance and transmittance. The model features wavelength, angle, and full hemispherical dependencies. It is applied to a variety of samples, from painted surfaces to transparent windows, with good success. This parameterized modeling approach is attractive because algorithms that use the model can be computationally efficient. Previous work has only considered in-plane effects. The present paper now explicitly takes into account the out-of-plane contribution and improves the total integrated factors.
机译:多年来,半经验反射率/散射模型已经发展成为代表从涂层基材到光学窗口的多种材料。该模型将BRDF / BSDF分为四个基本分量,即镜面反射,近镜面反射,漫反射和朗伯(随机漫射)项。镜面和近镜面分量采用高斯相位函数和菲涅耳功率反射系数。朗伯分量使用Kubelka-Munk理论获得总的反射率和透射率。该模型具有波长,角度和完整的半球依赖性。它适用于从油漆表面到透明窗户的各种样品,并获得了成功。这种参数化的建模方法很有吸引力,因为使用该模型的算法可以提高计算效率。先前的工作仅考虑了平面效应。现在,本文明确考虑了面外影响,并改善了总体综合因素。

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