AN INEXPENSIVE BRDF MODEL FOR PHYSICALLY-BASED RENDERING
AN INEXPENSIVE BRDF MODEL FOR PHYSICALLY-BASED RENDERING
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DOI：
10.1111/1467-8659.1330233
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发表时间：
1994-09-12
影响因子：
2.5
通讯作者：
SCHLICK, C
中科院分区：
文献类型：
--
作者：
SCHLICK, C
提出了一种新的BRDF模型，该模型可以看作是一种介于经验主义和理论之间的中介模型。观察到了物理学的主要结果(能量守恒、互易法则、微面理论)，并以物理上可信的方式(非相干和相干反射、光谱修改、各向异性、自阴影、多表面和次表面反射、均匀和非均匀材料之间的差异)解释了光反射中的许多现象。该模型特别用于计算机图形应用，因此包括两个主要特征：简单性(少量直观可理解的参数控制模型)和效率(该公式为蒙特卡罗渲染技术和/或硬件实现提供了充足的条件)。
A new BRDF model is presented which can be viewed as an kind of intermediary model between empirism and theory. Main results of physics are observed (energy conservation, reciprocity rule, microfacet theory) and numerous phenomena involved in light reflection are accounted for, in a physically plausible way (incoherent and coherent reflection, spectrum modifications, anisotropy, self-shadowing, multiple surface and subsurface reflection, differences between homogeneous and heterogeneous materials). The model has been especially intended for computer graphics applications and therefore includes two main features : simplicity (a small number of intuitively understandable parameters controls the model) and efficiency (the formulation provides adequation to Monte-Carlo rendering techniques and/or hardware implementations).