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Authors: Zheng Gong ; Zhimin Ren ; Zhangye Wang and Qunsheng Peng

Affiliation: State Key Laboratory of CAD&CG, Zhejiang University, China

Keyword(s): Multiple scattering, participating media, phase function, singular value decomposition.

Related Ontology Subjects/Areas/Topics: Computer Vision, Visualization and Computer Graphics ; Lighting and Appearance ; Rendering ; Rendering Algorithms ; Volume Rendering

Abstract: This paper presents an interactive method to compute multiple scattering in non-homogeneous participating media with an effective phase function approximation. The volume is represented by grids, which allows us to render dynamic scenes. We achieve interactive computation rate by factorizing the phase function in transport equation with singular value decomposition (SVD) and keeping only the first few low-order approximation terms. These terms are paired 2D incident-direction texture maps and 2D outgoing-direction texture maps. The complicated integral calculation of in-scattering in each rendering pass is efficiently approximated by simply retrieving data from textures. Graphics hardware is also employed for on-the-fly computation. Using the proposed algorithm, we demonstrate rendering of multiple scattering in dynamic scenes at interactive rates.

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Paper citation in several formats:
Gong, Z.; Ren, Z.; Wang, Z. and Peng, Q. (2007). INTERACTIVE RENDERING OF MULTIPLE SCATTERING IN PARTICIPATING MEDIA USING SEPARABLE PHASE FUNCTION. In Proceedings of the Second International Conference on Computer Graphics Theory and Applications (VISIGRAPP 2007) - Volume 2: GRAPP; ISBN 978-972-8865-71-9; ISSN 2184-4321, SciTePress, pages 262-268. DOI: 10.5220/0002084002620268

@conference{grapp07,
author={Zheng Gong. and Zhimin Ren. and Zhangye Wang. and Qunsheng Peng.},
title={INTERACTIVE RENDERING OF MULTIPLE SCATTERING IN PARTICIPATING MEDIA USING SEPARABLE PHASE FUNCTION},
booktitle={Proceedings of the Second International Conference on Computer Graphics Theory and Applications (VISIGRAPP 2007) - Volume 2: GRAPP},
year={2007},
pages={262-268},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002084002620268},
isbn={978-972-8865-71-9},
issn={2184-4321},
}

TY - CONF

JO - Proceedings of the Second International Conference on Computer Graphics Theory and Applications (VISIGRAPP 2007) - Volume 2: GRAPP
TI - INTERACTIVE RENDERING OF MULTIPLE SCATTERING IN PARTICIPATING MEDIA USING SEPARABLE PHASE FUNCTION
SN - 978-972-8865-71-9
IS - 2184-4321
AU - Gong, Z.
AU - Ren, Z.
AU - Wang, Z.
AU - Peng, Q.
PY - 2007
SP - 262
EP - 268
DO - 10.5220/0002084002620268
PB - SciTePress