Warped-Area Reparameterization of Differential Path Integrals
Warped-Area Reparameterization of Differential Path Integrals
复制标题
微分路径积分的扭曲面积重新参数化
DOI:
10.1145/3618330
复制
发表时间:
2023
影响因子:
6.2
通讯作者:
Zhao, Shuang
中科院分区:
文献类型:
--
作者:
Xu, Peiyu;Bangaru, Sai;Li, Tzu-Mao;Zhao, Shuang
Physics-based differentiable rendering is becoming increasingly crucial for tasks in inverse rendering and machine learning pipelines. To address discontinuities caused by geometric boundaries and occlusion, two classes of methods have been proposed: 1) the edge-sampling methods that directly sample light paths at the scene discontinuity boundaries, which require nontrivial data structures and precomputation to select the edges, and 2) the reparameterization methods that avoid discontinuity sampling but are currently limited to hemispherical integrals and unidirectional path tracing.We introduce a new mathematical formulation that enjoys the benefits of both classes of methods. Unlike previous reparameterization work that focused on hemispherical integral, we derive the reparameterization in the path space. As a result, to estimate derivatives using our formulation, we can apply advanced Monte Carlo rendering methods, such as bidirectional path tracing, while avoiding explicit sampling of discontinuity boundaries. We show differentiable rendering and inverse rendering results to demonstrate the effectiveness of our method.
登录
查看更多内容
影响因子:
6.2
作者:
Yan, Kai;Lassner, Christoph;Budge, Brian;Dong, Zhao;Zhao, Shuang
通讯作者:
Zhao, Shuang
影响因子:
6.2
作者:
Yu, Zihan;Zhang, Cheng;Nowrouzezahrai, Derek;Dong, Zhao;Zhao, Shuang
通讯作者:
Zhao, Shuang
DOI:
10.1145/3476576.3476672
发表时间:
2021
期刊:
ACM Transactions on Graphics (TOG)
影响因子:
--
作者:
Delio Vicini;Sébastien Speierer;Wenzel Jakob
通讯作者:
Wenzel Jakob
影响因子:
6.2
作者:
Zhang, Cheng;Dong, Zhao;Doggett, Michael;Zhao, Shuang
通讯作者:
Zhao, Shuang
影响因子:
6.2
作者:
Bangaru, Sai Praveen;Gharbi, Michael;Luan, Fujun;Li, Tzu-Mao;Sunkavalli, Kalyan;Hasan, Milos;Bi, Sai;Xu, Zexiang;Bernstein, Gilbert;Durand, Fredo
通讯作者:
Durand, Fredo