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International Conference on Computer Vision and Computer Graphics

VISIGRAPP 2008: Computer Vision and Computer Graphics. Theory and Applications pp 41–54Cite as

An Importance Sampling Method for Arbitrary BRDFs

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Part of the book series: Communications in Computer and Information Science ((CCIS,volume 24))

Abstract

This paper introduces a new BRDF sampling method with reduced variance, which is based on a hierarchical adaptive PDF. This PDF also is based on rejection sampling with a bounded average number of trials, even in regions where the BRDF exhibits high variations. Our algorithm works in an appropiate way with both physical, analytical and measured reflectance models. Reflected directions are sampled by using importance sampling of the BRDF times the cosine term. This fact improves computation of reflected radiance when Monte-Carlo integration is used in Global Illumination.

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Author information

Authors and Affiliations

  1. Dpt. Lenguajes y Sistemas Informáticos E.T.S.I. Informática y de Telecomunicación, University of Granada, Spain

    Rosana Montes, Carlos Ureña, Rubén García & Miguel Lastra

Authors
  1. Rosana Montes
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  2. Carlos Ureña
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  3. Rubén García
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  4. Miguel Lastra
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Editor information

Editors and Affiliations

  1. INSTICC, Avenida D. Manuel I, 2910, Setúbal, Portugal

    AlpeshKumar Ranchordas

  2. Institute for Systems and Robotics, Department of Electrical and Computer Engineering Polo II, University of Coimbra, 3030-290, Coimbra, Portugal

    Hélder J. Araújo

  3. Departamento de Engenharia Informática, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001, Lisboa, Portugal

    João Madeiras Pereira

  4. Departamento de Sistemas e Informatica, Escola Superior de Tecnologia do IPS, Rua do Vale de Chaves Estefanilha, 2910, Setúbal, Portugal

    José Braz

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© 2009 Springer-Verlag Berlin Heidelberg

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Montes, R., Ureña, C., García, R., Lastra, M. (2009). An Importance Sampling Method for Arbitrary BRDFs. In: Ranchordas, A., Araújo, H.J., Pereira, J.M., Braz, J. (eds) Computer Vision and Computer Graphics. Theory and Applications. VISIGRAPP 2008. Communications in Computer and Information Science, vol 24. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-10226-4_4

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  • DOI: https://doi.org/10.1007/978-3-642-10226-4_4

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-10225-7

  • Online ISBN: 978-3-642-10226-4

  • eBook Packages: Computer ScienceComputer Science (R0)

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