BEGIN:VCALENDAR VERSION:2.0 PRODID:Linklings LLC BEGIN:VTIMEZONE TZID:Asia/Seoul X-LIC-LOCATION:Asia/Seoul BEGIN:STANDARD TZOFFSETFROM:+0900 TZOFFSETTO:+0900 TZNAME:KST DTSTART:18871231T000000 DTSTART:19881009T020000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20230103T035307Z LOCATION:Auditorium\, Level 5\, West Wing DTSTART;TZID=Asia/Seoul:20221206T100000 DTEND;TZID=Asia/Seoul:20221206T120000 UID:siggraphasia_SIGGRAPH Asia 2022_sess153_papers_250@linklings.com SUMMARY:Marginal Multiple Importance Sampling DESCRIPTION:Technical Papers\n\nMarginal Multiple Importance Sampling\n\nW est, Georgiev, Hachisuka\n\nMultiple importance sampling (MIS) is a powerf ul tool to combine different sampling techniques in a provably good manner . MIS requires that the techniques' probability density functions (PDFs) a re readily evaluable point-wise. However, this requirement may not be sati sfied when (some of) those PDFs are marginals, i.e., integrals of other PD Fs. We generalize MIS to combine samples from such marginal PDFs. The key idea is to consider each marginalization domain as a continuous space of s ampling techniques with readily evaluable (conditional) PDFs. We stochasti cally select techniques from these spaces and combine the samples drawn fr om them into an unbiased estimator. Prior work has dealt with the special cases of multiple classical techniques or a single marginal one. Our formu lation can handle mixtures of those.\n\nWe apply our marginal MIS formulat ion to light-transport simulation to demonstrate its utility. We devise a marginal path sampling framework that makes previously intractable samplin g techniques practical and significantly broadens the path-sampling choice s beyond what is presently possible. We highlight results from two algorit hms based on marginal MIS: a novel formulation of path-space filtering at multiple vertices along a camera path and a similar filtering method for p hoton-density estimation.\n\nRegistration Category: FULL ACCESS, EXPERIENC E PLUS ACCESS, EXPERIENCE ACCESS, TRADE EXHIBITOR\n\nLanguage: ENGLISH\n\n Format: IN-PERSON URL:https://sa2022.siggraph.org/en/full-program/?id=papers_250&sess=sess15 3 END:VEVENT END:VCALENDAR