Paper Unlock

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)

PDF ImageFull Text

Sign In Guest: Register as new SciTePress user now for free.

Sign In SciTePress user: please login.

PDF ImageMy Papers

You are not signed in, therefore limits apply to your IP address

In the current month:
Recent papers: 100 available of 100 total
2+ years older papers: 200 available of 200 total

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

author={L. Schjøth and J. {R. Frisvad} and K. Erleben and Jon Sporring},
booktitle={Proceedings of the International Conference on Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2010)},


JO - Proceedings of the International Conference on Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2010)
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

Login or register to post comments.

Comments on this Paper: Be the first to review this paper.