Název:	Fast indirect lighting approximations using the representative candidate line space
Autoři:	Keul, Kevin Koß, Tilman Müller, Stefan
Citace zdrojového dokumentu:	Journal of WSCG. 2018, vol. 26, no. 1, p. 11-20.
Datum vydání:	2018
Nakladatel:	Václav Skala - UNION Agency
Typ dokumentu:	článek article
URI:	wscg.zcu.cz/WSCG2018/!_2018_Journal_WSCG-No-1.pdf http://hdl.handle.net/11025/34584
ISSN:	1213-6972 (print) 1213-6980 (CD-ROM) 1213-6964 (on-line)
Klíčová slova:	vizualizace;počítačová grafika;trasování paprsku;datové struktury;algoritmy viditelnosti
Klíčová slova v dalším jazyce:	visualization;computer graphics;ray tracing;data structures;visibility algorithms
Abstrakt v dalším jazyce:	We propose a novel approach for using directional Line Space information in calculation of indirect illumination. Typically, the Line Space is build on top of regular recursive grids and contains visibility information which is used to perform an efficient empty space skipping during traversal. In our method we extend the stored information by precomputed representative candidates, which are based on the Line Space shafts and serve as an approximation of the actual scene geometry. By using these candidates it is not necessary to compute any intersection tests and therefore the traversal is accelerated. However, the candidate approximation leads to visible artifacts. We therefore present a technique that significantly reduces these artifacts by extrapolation of the actual surface and demonstrate that the artifacts are nearly not perceivable in the application of indirect illumination. Moreover we adapt the Line Space to other data structures like bounding volume hierarchies (BVHs) which further increases the performance in ray tracing. Compared to the pure data structures we achieve significantly better performance with nearly no drawback in quality of indirect lighting.
Práva:	© Václav Skala - UNION Agency
Vyskytuje se v kolekcích:	Volume 26, Number 1 (2018)

Všechny záznamy v DSpace jsou chráněny autorskými právy, všechna práva vyhrazena.