Is accurate occlusion of glossy reflections necessary?
Is accurate occlusion of glossy reflections necessary?
复制标题
是否需要精确遮挡光泽反射？
DOI：
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
J. Kautz
中科院分区：
文献类型：
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作者：
Oscar Kozlowski;J. Kautz
近年来，许多研究都致力于在直接自然光照(包括正确的遮挡)下实时绘制准确的光泽反射。除非进行大量近似，否则这些反射依赖于视图的性质将始终导致此计算代价高昂。还有一个问题是，人类是否能够注意到精确度的差异，或者我们对场景真实感的感知是否保持不变，从而有效地浪费了为渲染准确反射而花费的额外努力。我们进行了一项用户研究，以分析在多种BRDF、照明环境和相机方向下，使用各种镜面反射遮挡近似渲染的有光泽场景的感知真实感是否会下降。我们证明，虽然没有一种近似总是合适的，但很少有场景的计算复杂度不能在一定程度上降低。
Much research in recent times has been conducted towards real-time rendering of accurate glossy reflections under direct, natural illumination including correct occlusions. The view dependent nature of these reflections will always cause this computation to be expensive unless heavily approximated. There also remains a question as to whether humans are even capable of noticing the difference in accuracy or whether our perception of the realism of the scene remains unchanged and thus the extra effort expended in rendering accurate reflections is effectively wasted. We conduct a user study to analyse any decline in perceived realism of glossy scenes rendered with a variety of specular occlusion approximations under a multitude of BRDFs, lighting environments and camera orientations. We demonstrate that although no one approximation is always suitable, it is rare to have a scene whose computational complexity cannot be decreased to some degree.
影响因子：
1.8
作者：
Fleming, RW;Torralba, A;Adelson, EH
通讯作者：
Adelson, EH