@article{PB-VRVis-2018-014,
author = {Walch, Andreas and Luksch, Christian and Szabo, Attila and Steinlechner, Harald and Haaser, Georg and Schw{\"a}rzler, Michael and Maierhofer, Stefan},
title = {Lens flare prediction based on measurements with real-time visualization},
year = {2018},
journaltitle = {The Visual Computer},
doi = {10.1007/s00371-018-1552-4},
url = {https://www.vrvis.at/publications/PB-VRVis-2018-014},
issn = {1432-2315},
abstract = {Lens flare is a visual phenomenon caused by interreflection of  light within a lens system. This effect is often seen as an  undesired artifact, but it also gives rendered images a  realistic appearance and is even used for artistic purposes. In  the area of computer graphics, several simulation-based  approaches have been presented to render lens flare for a given  spherical lens system. For physically reliable results, these  approaches require an accurate description of that system, which  differs from camera to camera. Also, for the lens flares  appearance, crucial parameters---especially the anti-reflection  coatings---can often only be approximated. In this paper we  present a novel workflow for generating physically plausible  renderings of lens flare phenomena by analyzing the lens flares  captured with a camera. Our method allows predicting the  occurrence of lens flares for a given light setup. This is an  often requested feature in light planning applications in order  to efficiently avoid lens flare-prone light positioning. A model  with a tight parameter set and a GPU-based rendering method  allows our approach to be used in real-time applications.},
}