Temporally Sliced Photon Primitives for Time-of-flight Rendering

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dc.contributor.authorLiu, Yangen_US
dc.contributor.authorJiao, Shaojieen_US
dc.contributor.authorJarosz, Wojciechen_US
dc.contributor.editorGhosh, Abhijeeten_US
dc.contributor.editorWei, Li-Yien_US
dc.date.accessioned2022-07-01T15:36:40Z
dc.date.available2022-07-01T15:36:40Z
dc.date.issued2022
dc.description.abstractWe derive a class of new Monte Carlo estimators for volumetric time-of-flight rendering, generalizing prior work on transient photon points and beams. Conceptually, our method starts with any steady-state photon primitive – like a photon plane, parallelepiped, or parallelotope – and slices it with a temporal wavefront, producing a primitive of one dimension lower. We show how different unbiased temporally sliced primitives arise by analytically integrating any four dimensions within a novel extended spatio-temporal path space formulation. The differences between these estimators reduce to the determinant of a 4×4 Jacobian matrix, with columns dictated by the chosen dimensions. We then show how to combine the relative strengths of different sliced primitives using multiple importance sampling. Finally, we implement several of the new estimators enabled by our theory and compare them to each other as well as previous techniques.en_US
dc.description.number4
dc.description.sectionheadersGlobal Illumination
dc.description.seriesinformationComputer Graphics Forum
dc.description.volume41
dc.identifier.doi10.1111/cgf.14584
dc.identifier.issn1467-8659
dc.identifier.pages29-40
dc.identifier.pages12 pages
dc.identifier.urihttps://doi.org/10.1111/cgf.14584
dc.identifier.urihttps://diglib.eg.org:443/handle/10.1111/cgf14584
dc.publisherThe Eurographics Association and John Wiley & Sons Ltd.en_US
dc.subjectCCS Concepts: Computing methodologies --> Ray tracing; Modeling and simulation
dc.subjectComputing methodologies
dc.subjectRay tracing
dc.subjectModeling and simulation
dc.titleTemporally Sliced Photon Primitives for Time-of-flight Renderingen_US
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