Wavelet Representation and Sampling of Complex Luminaires
| dc.contributor.author | Atanasov, Asen | en_US |
| dc.contributor.author | Koylazov, Vladimir | en_US |
| dc.contributor.editor | Wang, Beibei | en_US |
| dc.contributor.editor | Wilkie, Alexander | en_US |
| dc.date.accessioned | 2025-06-20T07:52:52Z | |
| dc.date.available | 2025-06-20T07:52:52Z | |
| dc.date.issued | 2025 | |
| dc.description.abstract | We contribute a technique for rendering the illumination of complex luminaires based on wavelet-compressed light fields while the direct appearance of the luminaire is handled with previous techniques. During a brief photon tracing phase, we precompute the radiance field of the luminaire. Then, we employ a compression scheme which is designed to facilitate fast per-ray run-time reconstructions of the field and importance sampling. To treat aliasing, we propose a two-component filtering solution: a 4D Gaussian filter during the pre-computation stage and a 4D stochastic Gaussian filter during rendering. We have developed an importance sampling strategy based on providing an initial guess from low-resolution and low-memory viewpoint samplers that is subsequently refined by a hierarchical process over the wavelet frequency bands. Our technique is straightforward to integrate in rendering systems and has all the features that make it practical for production renderers - MIS compatibility, brief pre-computation, low memory requirements, and efficient field evaluation and importance sampling. | en_US |
| dc.description.number | 4 | |
| dc.description.sectionheaders | Light and Brightness | |
| dc.description.seriesinformation | Computer Graphics Forum | |
| dc.description.volume | 44 | |
| dc.identifier.doi | 10.1111/cgf.70163 | |
| dc.identifier.issn | 1467-8659 | |
| dc.identifier.pages | 15 pages | |
| dc.identifier.uri | https://doi.org/10.1111/cgf.70163 | |
| dc.identifier.uri | https://diglib.eg.org/handle/10.1111/cgf70163 | |
| dc.publisher | The Eurographics Association and John Wiley & Sons Ltd. | en_US |
| dc.rights | Attribution 4.0 International License | |
| dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
| dc.subject | CCS Concepts: Computing methodologies → Rendering | |
| dc.subject | Computing methodologies → Rendering | |
| dc.title | Wavelet Representation and Sampling of Complex Luminaires | en_US |