Publication Details

An Improved Non-Orthogonal Texture Warping for Better Shadow Rendering

MILET Tomáš, NAVRÁTIL Jan and ZEMČÍK Pavel. An Improved Non-Orthogonal Texture Warping for Better Shadow Rendering. In: WSCG 2015 - Full Papers Proceedings. Plzeň: Union Agency, 2015, pp. 99-107. ISBN 978-80-86943-65-7.
Czech title
Neortogonální warpování textur pro zmenšení alias chyby shadow mappingu
Type
conference paper
Language
english
Authors
Keywords

shadow-mapping, alias, warping, local warping, minimal frustum, shadows

Abstract

The paper presents new real-time method for non-orthogonal texture warping. This warping is used for reducing alias error of shadow mapping. It is composed of two sets of warping function - for rows and columns of shadow map.

Annotation

In interactive applications, shadows are traditionally rendered using the shadow mapping algorithm.
The disadvantage of the algorithm is limited resolution of depth texture which may lead to aliasing artifacts on shadow edges.
This paper introduces an improved depth texture warping with non-orthogonal grid that can be employed for all kinds of light sources.
For instance, already known approaches for reducing aliasing artifacts are widely used in outdoor scenes with directional light sources but they are not directly applicable for point light sources.
We show that the improved warping parameterization reduces the aliasing artifacts and we are able to present high quality shadows regardless of a light source or a camera position in the scene.

Published
2015
Pages
99-107
Proceedings
WSCG 2015 - Full Papers Proceedings
Conference
23rd International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision 2015, Plzeň, CZ
ISBN
978-80-86943-65-7
Publisher
Union Agency
Place
Plzeň, CZ
EID Scopus
BibTeX
@INPROCEEDINGS{FITPUB10889,
   author = "Tom\'{a}\v{s} Milet and Jan Navr\'{a}til and Pavel Zem\v{c}\'{i}k",
   title = "An Improved Non-Orthogonal Texture Warping for Better Shadow Rendering",
   pages = "99--107",
   booktitle = "WSCG 2015 - Full Papers Proceedings",
   year = 2015,
   location = "Plze\v{n}, CZ",
   publisher = "Union Agency",
   ISBN = "978-80-86943-65-7",
   language = "english",
   url = "https://www.fit.vut.cz/research/publication/10889"
}
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