Photon differentials

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

Standard

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

GRAPHITE 2007: Proceedingsof the 5th international conference on computer graphics and interactive techniques in Australia and Southeast Asia, December 1-4, 2007, Perth, Western Austalia. Association for Computing Machinery, 2007. p. 179-186.

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

Harvard

Schjøth, L, Revall Frisvad, J, Erleben, K & Sporring, J 2007, Photon differentials. in GRAPHITE 2007: Proceedingsof the 5th international conference on computer graphics and interactive techniques in Australia and Southeast Asia, December 1-4, 2007, Perth, Western Austalia. Association for Computing Machinery, pp. 179-186, International Conference on Computer graphics and interactive techniques in Australia and Southeast Asia, Perth, Australia, 01/12/2007.

APA

Schjøth, L., Revall Frisvad, J., Erleben, K., & Sporring, J. (2007). Photon differentials. In GRAPHITE 2007: Proceedingsof the 5th international conference on computer graphics and interactive techniques in Australia and Southeast Asia, December 1-4, 2007, Perth, Western Austalia (pp. 179-186). Association for Computing Machinery.

Vancouver

Schjøth L, Revall Frisvad J, Erleben K, Sporring J. Photon differentials. In GRAPHITE 2007: Proceedingsof the 5th international conference on computer graphics and interactive techniques in Australia and Southeast Asia, December 1-4, 2007, Perth, Western Austalia. Association for Computing Machinery. 2007. p. 179-186

Author

Schjøth, Lars ; Revall Frisvad, Jeppe ; Erleben, Kenny ; Sporring, Jon. / Photon differentials. GRAPHITE 2007: Proceedingsof the 5th international conference on computer graphics and interactive techniques in Australia and Southeast Asia, December 1-4, 2007, Perth, Western Austalia. Association for Computing Machinery, 2007. pp. 179-186

Bibtex

@inproceedings{079eaea0aef611dcbee902004c4f4f50,
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 = "Faculty of Science, Global belysning, Photon mapping, Ray tracing, Partikel sporing, Ray differentials, Global Illumination, Photon mapping, Ray tracing, Particle tracing, Ray differentials",
author = "Lars Schj{\o}th and {Revall Frisvad}, Jeppe and Kenny Erleben and Jon Sporring",
year = "2007",
language = "English",
isbn = "978-1-59593-912-8",
pages = "179--186",
booktitle = "GRAPHITE 2007",
publisher = "Association for Computing Machinery",
note = "null ; Conference date: 01-12-2007 Through 04-12-2007",

}

RIS

TY - GEN

T1 - Photon differentials

AU - Schjøth, Lars

AU - Revall Frisvad, Jeppe

AU - Erleben, Kenny

AU - Sporring, Jon

N1 - Conference code: 5

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 - Faculty of Science

KW - Global belysning

KW - Photon mapping

KW - Ray tracing

KW - Partikel sporing

KW - Ray differentials

KW - Global Illumination

KW - Photon mapping

KW - Ray tracing

KW - Particle tracing

KW - Ray differentials

M3 - Article in proceedings

SN - 978-1-59593-912-8

SP - 179

EP - 186

BT - GRAPHITE 2007

PB - Association for Computing Machinery

Y2 - 1 December 2007 through 4 December 2007

ER -

ID: 1948442