A null-scattering path integral formulation of light transport
A null-scattering path integral formulation of light transport
复制标题
光传输的零散射路径积分公式
DOI:
10.1145/3306346.3323025
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发表时间:
2019
影响因子:
6.2
通讯作者:
Jarosz, Wojciech
中科院分区:
文献类型:
--
作者:
Miller, Bailey;Georgiev, Iliyan;Jarosz, Wojciech
Unbiased rendering of general, heterogeneous participating media currently requires using null-collision approaches for estimating transmittance and generating free-flight distances. A long-standing limitation of these approaches, however, is that the corresponding path pdfs cannot be computed due to the black-box nature of the null-collision rejection sampling process. These techniques therefore cannot be combined with other sampling techniques via multiple importance sampling (MIS), which significantly limits their robustness and generality. Recently, Galtier et al. [2013] showed how to derive these algorithms directly from the radiative transfer equation (RTE). We build off this generalized RTE to derive apath integralformulation of null scattering, which reveals the sampling pdfs and allows us to devise new, express existing, and combine complementary unbiased techniques via MIS. We demonstrate the practicality of our theory by combining, for the first time, several path sampling techniques in spatially and spectrally varying media, generalizing and outperforming the prior state of the art.
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DOI:
10.1145/15922.15901
发表时间:
1986-08
期刊:
Proceedings of the 13th annual conference on Computer graphics and interactive techniques
影响因子:
--
作者:
David S. Immel;Michael F. Cohen;D. Greenberg
通讯作者:
David S. Immel;Michael F. Cohen;D. Greenberg
DOI:
--
发表时间:
2014
期刊:
Computer graphics forum (Print)
影响因子:
--
作者:
A. Wilkie;S. Nawaz;M. Droske;A. Weidlich;J. Hanika
通讯作者:
J. Hanika
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
DOI:
--
发表时间:
1967
期刊:
影响因子:
--
作者:
L. B. Miller
通讯作者:
L. B. Miller
DOI:
--
发表时间:
2018
期刊:
Computer graphics forum (Print)
影响因子:
--
作者:
László Szirmay;M. Magdics;M. Sbert
通讯作者:
M. Sbert