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TEMPORAL PHOTON DIFFERENTIALS

Topics: Animation Algorithms and Techniques; Animation and Simulation of Natural Environments; Fundamental Methods and Algorithms; Geometric Computing; Lighting and Appearance; Modeling and Algorithms; Modeling of Natural Scenes and Phenomena; Physics-Based Modeling; Reflection and Illumination Models; Rendering Algorithms; Scene and Object Modeling; Solid and Heterogeneous Modeling; Surface Modeling

Authors: L. Schjøth 1 ; J. R. Frisvad 2 ; K. Erleben 1 and Jon Sporring 1

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

ISBN: 978-989-674-026-9

Keyword(s): Photon mapping, Ray differentials, First order structure.

Related Ontology Subjects/Areas/Topics: Animation Algorithms and Techniques ; Animation and Simulation ; Animation and Simulation of Natural Environments ; Computer Vision, Visualization and Computer Graphics ; Fundamental Methods and Algorithms ; Geometric Computing ; Geometry and Modeling ; Lighting and Appearance ; Modeling and Algorithms ; Modeling of Natural Scenes and Phenomena ; Physics-Based Modeling ; Reflection and Illumination Models ; Rendering ; Rendering Algorithms ; Scene and Object Modeling ; Solid and Heterogeneous Modeling ; Surface Modeling

Abstract: The finite frame rate also used in computer animated films is cause of adverse temporal aliasing effects. Most noticeable of these is a stroboscopic effect that is seen as intermittent movement of fast moving illumination. This effect can be mitigated using non-zero shutter times, effectively, constituting a temporal smoothing of rapidly changing illumination. In global illumination temporal smoothing can be achieved with distribution ray tracing (Cook et al., 1984). Unfortunately, this, and resembling methods, requires a high temporal resolution as samples has to be drawn from in-between frames. We present a novel method which is able to produce high quality temporal smoothing for indirect illumination without using in-between frames. Our method is based on ray differentials (Igehy, 1999) as it has been extended in (Sporring et al., 2009). Light rays are traced as bundles creating footprints, which are used to reconstruct indirect illumination. These footprints expand into the temp oral domain such that light rays interacting with non-static scene elements draw a path reacting to the elements movement. (More)

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Paper citation in several formats:
Schjøth L.; R. Frisvad J.; Erleben K.; Sporring J. and (2010). TEMPORAL PHOTON DIFFERENTIALS.In Proceedings of the International Conference on Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2010) ISBN 978-989-674-026-9, pages 54-61. DOI: 10.5220/0002847800540061

@conference{grapp10,
author={L. Schjøth and J. {R. Frisvad} and K. Erleben and Jon Sporring},
title={TEMPORAL PHOTON DIFFERENTIALS},
booktitle={Proceedings of the International Conference on Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2010)},
year={2010},
pages={54-61},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002847800540061},
isbn={978-989-674-026-9},
}

TY - CONF

JO - Proceedings of the International Conference on Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2010)
TI - TEMPORAL PHOTON DIFFERENTIALS
SN - 978-989-674-026-9
AU - Schjøth, L.
AU - R. Frisvad, J.
AU - Erleben, K.
AU - Sporring, J.
PY - 2010
SP - 54
EP - 61
DO - 10.5220/0002847800540061

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