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Comparison of microfacet BRDF model elements to diffraction BRDF model elements

机译:微面BRDF模型元素与衍射BRDF模型元素的比较

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A popular class of BRDF models is the microfacet model, where geometric optics is assumed, but where physical optics effects such as accurate wavelength scaling, important to Hyperspectral Imagery, are lost. More complex physical optics models may more accurately predict the BRDF, but the calculation is time-consuming. These seemingly disparate approaches are compared in detail. The linear systems direction cosine space is compared to microfacet coordinates, and the microfacet models Fresnel reflection in microfacet coordinates is compared to diffraction theory's Fresnel-like term. Similarities and differences between these terms are highlighted to merge these two approaches to the BRDF.
机译:一类流行的BRDF模型是微面模型,其中假定了几何光学,但是物理光学效应(例如对高光谱图像重要的精确波长缩放)丢失了。更复杂的物理光学模型可以更准确地预测BRDF,但是计算很耗时。对这些看似完全不同的方法进行了详细比较。将线性系统方向的余弦空间与微平面坐标进行比较,并将微平面模型中的菲涅耳反射与微分方程中的类似于菲涅耳的项进行比较。这些术语之间的相似点和不同点被突出显示,以将这两种方法合并到BRDF中。

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