Photon differentials in space and time
Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review
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Photon differentials in space and time. / Schjøth, Lars; Frisvad, J. R.; Erleben, Kenny; Sporring, Jon.
Computer Vision, Imaging and Computer Graphics. Theory and Applications: International Joint Conference, VISIGRAPP 2010, Angers, France, May 17-21, 2010. Revised Selected Papers. ed. / Paul Richard; José Braz. Springer, 2010. p. 274-286 (Communications in Computer and Information Science, Vol. 229).Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review
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TY - GEN
T1 - Photon differentials in space and time
AU - Schjøth, Lars
AU - Frisvad, J. R.
AU - Erleben, Kenny
AU - Sporring, Jon
PY - 2010
Y1 - 2010
N2 - The frame rate also used in computer animated 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 temporal domain such that light rays interacting with non-static scene elements draw a path reacting to the elements movement.
AB - The frame rate also used in computer animated 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 temporal domain such that light rays interacting with non-static scene elements draw a path reacting to the elements movement.
U2 - 10.1007/978-3-642-25382-9_19
DO - 10.1007/978-3-642-25382-9_19
M3 - Article in proceedings
AN - SCOPUS:84857512673
SN - 978-3-642-25381-2
T3 - Communications in Computer and Information Science
SP - 274
EP - 286
BT - Computer Vision, Imaging and Computer Graphics. Theory and Applications
A2 - Richard, Paul
A2 - Braz, José
PB - Springer
T2 - International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications, VISIGRAPP 2010
Y2 - 17 May 2010 through 21 May 2012
ER -
ID: 38539987