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Efficient inverse lighting: A statistical approach

Given a scene to illuminate satisfying a specific set of lighting intentions, the inverse lighting techniques allow us to obtain the unknown light source parameters, such as light position or flux emission. This paper introduces a new inverse lighting approach that uses the radiosity mean and variance to define lighting intentions of a scene. It is shown that these statistical parameters can be obtained without the previous calculation of the radiosity of the scene. Avoiding the explicit computation of the illumination of the scene results in a drastic reduction of the time required for the inverse process. This approach also provides a methodology that transforms a current set of lighting intentions into a single lighting intention with statistical parameters. The tests show that the processing time for solving the inverse problem can be reduced to a few seconds in most cases, improving previous work

This work was partially funded by the TIN2010-20590-C02-02 project from Ministerio de Ciencia e Innovacion, Spain, by program 720 from Universidad de la Republica, Uruguay, and by Programa de Desarrollo de las Ciencias Basicas, Uruguay

© Automation in Construction, 2014, vol. 37, p. 48-57

Elsevier

Author: Fernández, Eduardo
Besuievsky, Gonzalo
Date: 2014
Abstract: Given a scene to illuminate satisfying a specific set of lighting intentions, the inverse lighting techniques allow us to obtain the unknown light source parameters, such as light position or flux emission. This paper introduces a new inverse lighting approach that uses the radiosity mean and variance to define lighting intentions of a scene. It is shown that these statistical parameters can be obtained without the previous calculation of the radiosity of the scene. Avoiding the explicit computation of the illumination of the scene results in a drastic reduction of the time required for the inverse process. This approach also provides a methodology that transforms a current set of lighting intentions into a single lighting intention with statistical parameters. The tests show that the processing time for solving the inverse problem can be reduced to a few seconds in most cases, improving previous work
This work was partially funded by the TIN2010-20590-C02-02 project from Ministerio de Ciencia e Innovacion, Spain, by program 720 from Universidad de la Republica, Uruguay, and by Programa de Desarrollo de las Ciencias Basicas, Uruguay
Format: application/pdf
ISSN: 0926-5805
Document access: http://hdl.handle.net/10256/11979
Language: eng
Publisher: Elsevier
Collection: MICINN/PN 2011-2013/TIN2010-20590-C02-02
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.autcon.2013.09.004
Articles publicats (D-IMA)
Is part of: © Automation in Construction, 2014, vol. 37, p. 48-57
Rights: Tots els drets reservats
Subject: Infografia
Computer graphics
Optimització matemàtica
Mathematical optimization
Title: Efficient inverse lighting: A statistical approach
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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