Improved Stochastic Progressive Photon Mapping with Metropolis Sampling
Improved Stochastic Progressive Photon Mapping with Metropolis Sampling
复制标题
使用 Metropolis 采样改进随机渐进光子映射
DOI:
10.1111/j.1467-8659.2011.01979.x
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发表时间:
2011-06
影响因子:
2.5
通讯作者:
Yong, Jun-Hai
中科院分区:
文献类型:
--
作者:
Chen, Jiating;Wang, Bin;Yong, Jun-Hai
This paper presents an improvement to the stochastic progressive photon mapping (SPPM), a method for robustly simulating complex global illumination with distributed ray tracing effects. Normally, similar to photon mapping and other particle tracing algorithms, SPPM would become inefficient when the photons are poorly distributed. An inordinate amount of photons are required to reduce the error caused by noise and bias to acceptable levels. In order to optimize the distribution of photons, we propose an extension of SPPM with a Metropolis‐Hastings algorithm, effectively exploiting local coherence among the light paths that contribute to the rendered image. A well‐designed scalar contribution function is introduced as our Metropolis sampling strategy, targeting at specific parts of image areas with large error to improve the efficiency of the radiance estimator. Experimental results demonstrate that the new Metropolis sampling based approach maintains the robustness of the standard SPPM method, while significantly improving the rendering efficiency for a wide range of scenes with complex lighting.
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DOI:
--
发表时间:
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期刊:
--
影响因子:
--
作者:
M. Pharr;G. Humphreys
通讯作者:
M. Pharr;G. Humphreys
DOI:
10.1145/280811.280978
发表时间:
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期刊:
Seminal graphics: pioneering efforts that shaped the field
影响因子:
--
作者:
R. L. Cook;Thomas K. Porter;L. Carpenter
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R. L. Cook;Thomas K. Porter;L. Carpenter
DOI:
10.1145/1966394.1966404
发表时间:
2011-05
期刊:
ACM Trans. Graph.
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--
作者:
Claude Knaus;Matthias Zwicker
通讯作者:
Claude Knaus;Matthias Zwicker
DOI:
10.1145/1661412.1618487
发表时间:
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期刊:
ACM SIGGRAPH Asia 2009 papers
影响因子:
--
作者:
T. Hachisuka;H. Jensen
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T. Hachisuka;H. Jensen
DOI:
10.1145/280811.280987
发表时间:
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Seminal graphics: pioneering efforts that shaped the field
影响因子:
--
作者:
J. Kajiya
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J. Kajiya