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Authors: Kei Iwasaki 1 ; Yoshinori Dobashi 2 ; Fujiichi Yoshimoto 3 and Tomoyuki Nishita 3

Affiliations: 1 Wakayama University; Hokkaido University, Japan ; 2 Wakayama University, Hokkaido University, Japan ; 3 Wakayama University, The University of Tokyo, Japan

ISBN: 978-989-8111-67-8

Keyword(s): BRDF(Bidirectional Reflectance Distribution Function), Material Editing, Inverse Problem, Image-based Lighting.

Related Ontology Subjects/Areas/Topics: Computer Vision, Visualization and Computer Graphics ; Image-Based Rendering ; Lighting and Appearance ; Real-Time Rendering ; Rendering

Abstract: This paper presents a BRDF modeling method, based on an inverse problem approach. Our method calculates BRDFs to match the appearance of the object specified by the user. By representing BRDFs by a linear combination of basis functions, outgoing radiances of the object surface can be represented using basis functions. The calculation of the desired BRDF results from calculating the corresponding coefficients of basis functions that minimize the sum of differences between the outgoing radiances, represented using basis functions and user specified radiances. The properties that BRDFs must satisfy are described by linear constraint conditions. This minimization problem can be solved, interactively, using a linearly constrained least squares approach. Thus, our method allows the user to design BRDFs directly, under fixed complex lighting and viewpoint, and to view the rendering results interactively, under dynamic lighting and viewpoint.

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Paper citation in several formats:
Iwasaki K., Dobashi Y., Yoshimoto F. and Nishita T. (2009). AN INVERSE PROBLEM APPROACH TO BRDF MODELING.In Proceedings of the Fourth International Conference on Computer Graphics Theory and Applications (VISIGRAPP 2009)ISBN 978-989-8111-67-8, pages 129-136. DOI: 10.5220/0001784601290136

@conference{grapp09,
author={Kei Iwasaki and Yoshinori Dobashi and Fujiichi Yoshimoto and Tomoyuki Nishita},
title={AN INVERSE PROBLEM APPROACH TO BRDF MODELING},
booktitle={Proceedings of the Fourth International Conference on Computer Graphics Theory and Applications (VISIGRAPP 2009)},
year={2009},
pages={129-136},
doi={10.5220/0001784601290136},
isbn={978-989-8111-67-8},
}

TY - CONF

JO - Proceedings of the Fourth International Conference on Computer Graphics Theory and Applications (VISIGRAPP 2009)
TI - AN INVERSE PROBLEM APPROACH TO BRDF MODELING
SN - 978-989-8111-67-8
AU - Iwasaki K.
AU - Dobashi Y.
AU - Yoshimoto F.
AU - Nishita T.
PY - 2009
SP - 129
EP - 136
DO - 10.5220/0001784601290136

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