Progressive Transient Photon Beams

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Date
2019
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© 2019 Eurographics ‐ The European Association for Computer Graphics and John Wiley & Sons Ltd
Abstract
In this work, we introduce a novel algorithm for transient rendering in participating media. Our method is consistent, robust and is able to generate animations of time‐resolved light transport featuring complex caustic light paths in media. We base our method on the observation that the spatial continuity provides an increased coverage of the temporal domain, and generalize photon beams to transient‐state. We extend stead‐state photon beam radiance estimates to include the temporal domain. Then, we develop a progressive variant of our approach which provably converges to the correct solution using finite memory by averaging independent realizations of the estimates with progressively reduced kernel bandwidths. We derive the optimal convergence rates accounting for space and time kernels, and demonstrate our method against previous consistent transient rendering methods for participating media.In this work, we introduce a novel algorithm for transient rendering in participating media. Our method is consistent, robust and is able to generate animations of time‐resolved light transport featuring complex caustic light paths in media. We base our method on the observation that the spatial continuity provides an increased coverage of the temporal domain, and generalize photon beams to transient‐state. We extend stead‐state photon beam radiance estimates to include the temporal domain. Then, we develop a progressive variant of our approach which provably converges to the correct solution using finite memory by averaging independent realizations of the estimates with progressively reduced kernel bandwidths. We derive the optimal convergence rates accounting for space and time kernels, and demonstrate our method against previous consistent transient rendering methods for participating media.
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@article{
10.1111:cgf.13600
, journal = {Computer Graphics Forum}, title = {{
Progressive Transient Photon Beams
}}, author = {
Marco, Julio
and
Guillén, Ibón
and
Jarosz, Wojciech
and
Gutierrez, Diego
and
Jarabo, Adrian
}, year = {
2019
}, publisher = {
© 2019 Eurographics ‐ The European Association for Computer Graphics and John Wiley & Sons Ltd
}, ISSN = {
1467-8659
}, DOI = {
10.1111/cgf.13600
} }
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