A comprehensive physical model for light reflection
A comprehensive physical model for light reflection
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DOI：
10.1145/122718.122738
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发表时间：
1991-07
期刊：
影响因子：
--
通讯作者：
Xiao D. He;K. Torrance;F. Sillion;D. Greenberg
中科院分区：
文献类型：
--
作者：
Xiao D. He;K. Torrance;F. Sillion;D. Greenberg
本文提出了一种新的计算机图形学通用反射率模型。该模型是基于物理光学和描述镜面，定向漫反射，均匀漫反射的表面。反射光图案取决于波长、入射角、两个表面粗糙度参数和表面折射率。该配方是自洽的偏振，表面粗糙度，掩蔽/遮蔽，和能量。该模型适用于广泛的材料和表面光洁度，并提供了一个平滑的过渡，从漫反射到镜面反射的波长和入射角增加或表面粗糙度降低。该模型是解析的，适合于计算机图形学应用。预测的反射率分布与实验相比，有利。该模型适用于金属，非金属和塑料材料，具有光滑和粗糙的表面。
A new general reflectance model for computer graphics is presented. The model is based on physical optics and describes specular, directional diffuse, and uniform diffuse reflection by a surface. The reflected light pattern depends on wavelength, incidence angle, two surface roughness parameters, and surface refractive index. The formulation is self consistent in terms of polarization, surface roughness, masking/shadowing, and energy. The model applies to a wide range of materials and surface finishes and provides a smooth transition from diffuse-like to specular reflection as the wavelength and incidence angle are increased or the surface roughness is decreased. The model is analytic and suitable for Computer Graphics applications. Predicted reflectance distributions compare favorably with experiment. The model is applied to metallic, nonmetallic, and plastic materials, with smooth and rough surfaces.