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Authors: Lars Schjøth 1 ; Ole Fogh Olsen 1 and Jon Sporring 2

Affiliations: 1 IT University of Copenhagen, Denmark ; 2 University of Copenhagen, Denmark

Keyword(s): Ray-tracing, global illumination, photon mapping, caustics, density estimation, diffusion filtering.

Related Ontology Subjects/Areas/Topics: Computer Vision, Visualization and Computer Graphics ; Image-Based Rendering ; Rendering ; Rendering Algorithms

Abstract: Density estimation employed in multi-pass global illumination algorithms give cause to a trade-off problem between bias and noise. The problem is seen most evident as blurring of strong illumination features. In particular this blurring erodes fine structures and sharp lines prominent in caustics. To address this problem we introduce a novel photon mapping algorithm based on nonlinear anisotropic diffusion. Our algorithm adapts according to the structure of the photon map such that smoothing occurs along edges and structures and not across. In this way we preserve the important illumination features, while eliminating noise. We call our method diffusion based photon mapping.

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Paper citation in several formats:
Schjøth, L.; Fogh Olsen, O. and Sporring, J. (2006). DIFFUSION BASED PHOTON MAPPING. In Proceedings of the First International Conference on Computer Graphics Theory and Applications (VISIGRAPP 2006) - GRAPP; ISBN 972-8865-39-2; ISSN 2184-4321, SciTePress, pages 168-175. DOI: 10.5220/0001358101680175

@conference{grapp06,
author={Lars Schjøth. and Ole {Fogh Olsen}. and Jon Sporring.},
title={DIFFUSION BASED PHOTON MAPPING},
booktitle={Proceedings of the First International Conference on Computer Graphics Theory and Applications (VISIGRAPP 2006) - GRAPP},
year={2006},
pages={168-175},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001358101680175},
isbn={972-8865-39-2},
issn={2184-4321},
}

TY - CONF

JO - Proceedings of the First International Conference on Computer Graphics Theory and Applications (VISIGRAPP 2006) - GRAPP
TI - DIFFUSION BASED PHOTON MAPPING
SN - 972-8865-39-2
IS - 2184-4321
AU - Schjøth, L.
AU - Fogh Olsen, O.
AU - Sporring, J.
PY - 2006
SP - 168
EP - 175
DO - 10.5220/0001358101680175
PB - SciTePress

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