Photon differentials

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Standard

Photon differentials. / Schjøth, Lars; Frisvad, Jeppe Revall; Erleben, Kenny; Sporring, Jon.

Proceedings - GRAPHITE 2007, 5th International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia. 2007. p. 179-186 (Proceedings - GRAPHITE 2007, 5th International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia).

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Harvard

Schjøth, L, Frisvad, JR, Erleben, K & Sporring, J 2007, Photon differentials. in Proceedings - GRAPHITE 2007, 5th International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia. Proceedings - GRAPHITE 2007, 5th International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia, pp. 179-186, 5th International Conference on Computer Graphics and Interactive Techniques in Australasia and South-East Asia, GRAPHITE 2007, Perth, WA, Australia, 01/12/2007. https://doi.org/10.1145/1321261.1321293

APA

Schjøth, L., Frisvad, J. R., Erleben, K., & Sporring, J. (2007). Photon differentials. In Proceedings - GRAPHITE 2007, 5th International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia (pp. 179-186). Proceedings - GRAPHITE 2007, 5th International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia https://doi.org/10.1145/1321261.1321293

Vancouver

Schjøth L, Frisvad JR, Erleben K, Sporring J. Photon differentials. In Proceedings - GRAPHITE 2007, 5th International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia. 2007. p. 179-186. (Proceedings - GRAPHITE 2007, 5th International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia). https://doi.org/10.1145/1321261.1321293

Author

Schjøth, Lars ; Frisvad, Jeppe Revall ; Erleben, Kenny ; Sporring, Jon. / Photon differentials. Proceedings - GRAPHITE 2007, 5th International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia. 2007. pp. 179-186 (Proceedings - GRAPHITE 2007, 5th International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia).

Bibtex

@inproceedings{b714228c3f8f4352a09ec21cc251155d,
title = "Photon differentials",
abstract = "A number of popular global illumination algorithms uses density estimation to approximate indirect illumination. The density estimate is performed on finite points - particles - generated by a stochastic sampling of the scene. In the course of the sampling, particles, representing light, are stochastically emitted from the light sources and reflected around the scene. The sampling induces noise, which in turn is handled by the density estimate during the illumination reconstruction. Unfortunately, this noise reduction imposes a systematic error (bias), which is seen as a blurring of prominent illumination features. This is often not desirable as these may lose clarity or vanish altogether. We present an accurate method for reconstruction of indirect illumination with photon mapping. Instead of reconstructing illumination using classic density estimation on finite points, we use the correlation of light footprints, created by using Ray Differentials during the light pass. This procedure gives a high illumination accuracy, improving the trade-off between bias and variance considerable as compared to traditional particle tracing algorithms. In this way we preserve structures in indirect illumination.",
keywords = "caustics, global illumination, photon mapping, ray differentials, ray-tracing",
author = "Lars Schj{\o}th and Frisvad, {Jeppe Revall} and Kenny Erleben and Jon Sporring",
year = "2007",
doi = "10.1145/1321261.1321293",
language = "English",
isbn = "9781595939128",
series = "Proceedings - GRAPHITE 2007, 5th International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia",
pages = "179--186",
booktitle = "Proceedings - GRAPHITE 2007, 5th International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia",
note = "5th International Conference on Computer Graphics and Interactive Techniques in Australasia and South-East Asia, GRAPHITE 2007 ; Conference date: 01-12-2007 Through 04-12-2007",

}

RIS

TY - GEN

T1 - Photon differentials

AU - Schjøth, Lars

AU - Frisvad, Jeppe Revall

AU - Erleben, Kenny

AU - Sporring, Jon

PY - 2007

Y1 - 2007

N2 - A number of popular global illumination algorithms uses density estimation to approximate indirect illumination. The density estimate is performed on finite points - particles - generated by a stochastic sampling of the scene. In the course of the sampling, particles, representing light, are stochastically emitted from the light sources and reflected around the scene. The sampling induces noise, which in turn is handled by the density estimate during the illumination reconstruction. Unfortunately, this noise reduction imposes a systematic error (bias), which is seen as a blurring of prominent illumination features. This is often not desirable as these may lose clarity or vanish altogether. We present an accurate method for reconstruction of indirect illumination with photon mapping. Instead of reconstructing illumination using classic density estimation on finite points, we use the correlation of light footprints, created by using Ray Differentials during the light pass. This procedure gives a high illumination accuracy, improving the trade-off between bias and variance considerable as compared to traditional particle tracing algorithms. In this way we preserve structures in indirect illumination.

AB - A number of popular global illumination algorithms uses density estimation to approximate indirect illumination. The density estimate is performed on finite points - particles - generated by a stochastic sampling of the scene. In the course of the sampling, particles, representing light, are stochastically emitted from the light sources and reflected around the scene. The sampling induces noise, which in turn is handled by the density estimate during the illumination reconstruction. Unfortunately, this noise reduction imposes a systematic error (bias), which is seen as a blurring of prominent illumination features. This is often not desirable as these may lose clarity or vanish altogether. We present an accurate method for reconstruction of indirect illumination with photon mapping. Instead of reconstructing illumination using classic density estimation on finite points, we use the correlation of light footprints, created by using Ray Differentials during the light pass. This procedure gives a high illumination accuracy, improving the trade-off between bias and variance considerable as compared to traditional particle tracing algorithms. In this way we preserve structures in indirect illumination.

KW - caustics

KW - global illumination

KW - photon mapping

KW - ray differentials

KW - ray-tracing

UR - http://www.scopus.com/inward/record.url?scp=77956321822&partnerID=8YFLogxK

U2 - 10.1145/1321261.1321293

DO - 10.1145/1321261.1321293

M3 - Article in proceedings

AN - SCOPUS:77956321822

SN - 9781595939128

T3 - Proceedings - GRAPHITE 2007, 5th International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia

SP - 179

EP - 186

BT - Proceedings - GRAPHITE 2007, 5th International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia

T2 - 5th International Conference on Computer Graphics and Interactive Techniques in Australasia and South-East Asia, GRAPHITE 2007

Y2 - 1 December 2007 through 4 December 2007

ER -

ID: 306858736