Efficient estimation of boundary integrals for path-space differentiable rendering
Efficient estimation of boundary integrals for path-space differentiable rendering
复制标题
路径空间可微渲染边界积分的有效估计
DOI:
10.1145/3528223.3530080
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发表时间:
2022
影响因子:
6.2
通讯作者:
Zhao, Shuang
中科院分区:
文献类型:
--
作者:
Yan, Kai;Lassner, Christoph;Budge, Brian;Dong, Zhao;Zhao, Shuang
Boundary integrals are unique to physics-based differentiable rendering and crucial for differentiating with respect to object geometry. Under the differential path integral framework---which has enabled the development of sophisticated differentiable rendering algorithms---the boundary components are themselves path integrals. Previously, although the mathematical formulation of boundary path integrals have been established, efficient estimation of these integrals remains challenging.In this paper, we introduce a new technique to efficiently estimate boundary path integrals. A key component of our technique is a primary-sample-space guiding step for importance sampling of boundary segments. Additionally, we show multiple importance sampling can be used to combine multiple guided samplings. Lastly, we introduce an optional edge sorting step to further improve the runtime performance. We evaluate the effectiveness of our method using several differentiable-rendering and inverse-rendering examples and provide comparisons with existing methods for reconstruction as well as gradient quality.
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DOI:
10.1145/2601097.2601203
发表时间:
2014-07
期刊:
ACM Transactions on Graphics (TOG)
影响因子:
--
作者:
J. Vorba;Ondrej Karlik;M. Šik;Tobias Ritschel;Jaroslav Křivánek
通讯作者:
J. Vorba;Ondrej Karlik;M. Šik;Tobias Ritschel;Jaroslav Křivánek
影响因子:
6.2
作者:
Zhang, Cheng;Yu, Zihan;Zhao, Shuang
通讯作者:
Zhao, Shuang
影响因子:
6.2
作者:
Yang Zhou;Lifan Wu;R. Ramamoorthi;Ling
通讯作者:
Ling
影响因子:
6.2
作者:
Zhang, Cheng;Dong, Zhao;Doggett, Michael;Zhao, Shuang
通讯作者:
Zhao, Shuang