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RENDERING IMAGES USING MODIFIED MULTIPLE IMPORTANCE SAMPLING
RENDERING IMAGES USING MODIFIED MULTIPLE IMPORTANCE SAMPLING
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机译:使用修改的多个重要采样渲染图像
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摘要
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for image rendering. One of the methods includes receiving data describing a scene, wherein the scene comprises one or more light sources and one or more objects having different surface optical properties; receiving a request to render an image of the scene using a multiple importance sampling method that combines a plurality of sampling techniques, wherein each sampling technique uses a different probability distribution to sample a respective fraction of total number of samples; modifying a particular one of the probability distributions to reduce a variance of the multiple importance sampling while holding the respective fractions and the other probability distributions fixed; rendering the scene using the multiple importance sampling using the modified particular probability distribution and the other probability distributions; and outputting the rendered scene in response to the request.
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