Quantifying the Error of Light Transport Algorithms
| dc.contributor.author | Celarek, Adam | en_US |
| dc.contributor.author | Jakob, Wenzel | en_US |
| dc.contributor.author | Wimmer, Michael | en_US |
| dc.contributor.author | Lehtinen, Jaakko | en_US |
| dc.contributor.editor | Boubekeur, Tamy and Sen, Pradeep | en_US |
| dc.date.accessioned | 2019-07-14T19:24:33Z | |
| dc.date.available | 2019-07-14T19:24:33Z | |
| dc.date.issued | 2019 | |
| dc.description.abstract | This paper proposes a new methodology for measuring the error of unbiased physically based rendering algorithms. The current state of the art includes mean squared error (MSE) based metrics and visual comparisons of equal-time renderings of competing algorithms. Neither is satisfying as MSE does not describe behavior and can exhibit significant variance, and visual comparisons are inherently subjective. Our contribution is two-fold: First, we propose to compute many short renderings instead of a single long run and use the short renderings to estimate MSE expectation and variance as well as per-pixel standard deviation. An algorithm that achieves good results in most runs, but with occasional outliers is essentially unreliable, which we wish to quantify numerically. We use per-pixel standard deviation to identify problematic lighting effects of rendering algorithms. The second contribution is the error spectrum ensemble (ESE), a tool for measuring the distribution of error over frequencies. The ESE serves two purposes: It reveals correlation between pixels and can be used to detect outliers, which offset the amount of error substantially. | en_US |
| dc.description.number | 4 | |
| dc.description.sectionheaders | Light Transport | |
| dc.description.seriesinformation | Computer Graphics Forum | |
| dc.description.volume | 38 | |
| dc.identifier.doi | 10.1111/cgf.13775 | |
| dc.identifier.issn | 1467-8659 | |
| dc.identifier.pages | 111-121 | |
| dc.identifier.uri | https://doi.org/10.1111/cgf.13775 | |
| dc.identifier.uri | https://diglib.eg.org:443/handle/10.1111/cgf13775 | |
| dc.publisher | The Eurographics Association and John Wiley & Sons Ltd. | en_US |
| dc.subject | Computing methodologies | |
| dc.subject | Ray tracing | |
| dc.title | Quantifying the Error of Light Transport Algorithms | en_US |