基于多重重要采样的光子密度估计

ACM SIGGRAPH Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia Pub Date : 2009-12-16 DOI:10.1145/1666778.1666815

Yusuke Tokuyoshi

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引用次数: 5

摘要

在全局照明渲染中，经常使用最终采集(或路径跟踪)和焦散光子图[Jensen 2001]。然而，光子映射产生的估计结果在光滑表面上有许多噪声，如图1左图所示。我们使用MIS(多重重要抽样)来解决这个问题[Veach 1997]。我们的方法的优点是易于实现，较低的开销，并且无需精细的参数调优即可获得良好的估计结果。

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Photon density estimation using multiple importance sampling

In global illumination rendering, final gathering (or path tracing) and caustics photon map [Jensen 2001] are frequently used. However, photon mapping generate estimation results with many noises on glossy surfaces as in the left image of Figure 1. We solve this problem using MIS (multiple importance sampling) [Veach 1997]. The advantages of our method are an easy implementation, lower overheads, and good estimation results without delicate parameter tuning.

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ACM SIGGRAPH Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia

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