Foveated Real-Time Path Tracing in Visual-Polar Space
| dc.contributor.author | Koskela, Matias | en_US |
| dc.contributor.author | Lotvonen, Atro | en_US |
| dc.contributor.author | Mäkitalo, Markku | en_US |
| dc.contributor.author | Kivi, Petrus | en_US |
| dc.contributor.author | Viitanen, Timo | en_US |
| dc.contributor.author | Jääskeläinen, Pekka | en_US |
| dc.contributor.editor | Boubekeur, Tamy and Sen, Pradeep | en_US |
| dc.date.accessioned | 2019-07-14T19:22:28Z | |
| dc.date.available | 2019-07-14T19:22:28Z | |
| dc.date.issued | 2019 | |
| dc.description.abstract | Computing power is still the limiting factor in photorealistic real-time rendering. Foveated rendering improves perceived quality by focusing the rendering effort on where the user is looking at. Applying foveated rendering to real-time path tracing where we must work on a very small number of samples per pixel introduces additional challenges; the rendering result is thoroughly noisy and sparse in the periphery. In this paper we demonstrate foveated real-time path tracing system and propose a novel Visual-Polar space in which both real-time path tracing and denoising is done before mapping to screen space. When path tracing a regular grid of samples in Visual-Polar space, the screen space sample distribution follows the human visual acuity model, making both the rendering and denoising 2:5x faster with similar perceived quality. In addition, when using Visual- Polar space, primary rays stay more coherent, leading to improved utilization of the GPU resources and, therefore, making ray traversal 1.3 - 1.5x faster. Moreover, Visual-Polar space improves 1 sample per pixel denoising quality in the fovea. We show that Visual-Polar based path tracing enables real-time rendering for contemporary virtual reality devices even without dedicated ray tracing hardware acceleration. | en_US |
| dc.description.sectionheaders | Interactive and Real-time Rendering | |
| dc.description.seriesinformation | Eurographics Symposium on Rendering - DL-only and Industry Track | |
| dc.identifier.doi | 10.2312/sr.20191219 | |
| dc.identifier.isbn | 978-3-03868-095-6 | |
| dc.identifier.issn | 1727-3463 | |
| dc.identifier.pages | 39-50 | |
| dc.identifier.uri | https://doi.org/10.2312/sr.20191219 | |
| dc.identifier.uri | https://diglib.eg.org:443/handle/10.2312/sr20191219 | |
| dc.publisher | The Eurographics Association | en_US |
| dc.subject | Computing methodologies | |
| dc.subject | Perception | |
| dc.subject | Ray tracing | |
| dc.subject | Virtual reality | |
| dc.title | Foveated Real-Time Path Tracing in Visual-Polar Space | en_US |