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181
Voted
RT
2005
Springer
2005
Springer
Metropolis Photon Sampling with Optional User Guidance
We present Metropolis Photon Sampling (MPS), a visual importance-driven algorithm for populating photon maps. Photon Mapping and other particle tracing algorithms fail if the photons are poorly distributed. Our approach samples light transport paths that join a light to the eye, which accounts for the viewer in the sampling process and provides information to improve photon storage. Paths are sampled with a Metropolis-Hastings algorithm that exploits coherence among important light paths. We also present a technique for including user selected paths in the sampling process without introducing bias. This allows a user to provide hints about important paths or reduce variance in specific parts of the image. We demonstrate MPS with a range of scenes and show quantitative improvements in error over standard Photon Mapping and Metropolis Light Transport. Categories and Subject Descriptors (according to ACM CCS): I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism Color, shad...
Real-time Traffic| Added | 28 Jun 2010 |
| Updated | 28 Jun 2010 |
| Type | Conference |
| Year | 2005 |
| Where | RT |
| Authors | Shaohua Fan, Stephen Chenney, Yu-chi Lai |
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