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%0 Conference Proceedings
%4 sid.inpe.br/sibgrapi/2017/08.21.21.34
%2 sid.inpe.br/sibgrapi/2017/08.21.21.34.07
%T Using Dimensionality Reduction to Create New Materials from Tabular BRDFs
%D 2017
%8 Oct. 17-20, 2017
%A Nunes, Mislene da Silva,
%A Miranda Junior, Gastão Florêncio,
%A Andrade, Beatriz Trinchão,
%@affiliation Universidade Federal de Sergipe
%@affiliation Universidade Federal de Sergipe
%@affiliation Universidade Federal de Sergipe
%E Torchelsen, Rafael Piccin,
%E Nascimento, Erickson Rangel do,
%E Panozzo, Daniele,
%E Liu, Zicheng,
%E Farias, Mylène,
%E Viera, Thales,
%E Sacht, Leonardo,
%E Ferreira, Nivan,
%E Comba, João Luiz Dihl,
%E Hirata, Nina,
%E Schiavon Porto, Marcelo,
%E Vital, Creto,
%E Pagot, Christian Azambuja,
%E Petronetto, Fabiano,
%E Clua, Esteban,
%E Cardeal, Flávio,
%B Conference on Graphics, Patterns and Images, 30 (SIBGRAPI)
%C Niterói, RJ
%S Proceedings
%I IEEE Computer Society
%J Los Alamitos
%K Dimensionality reduction, BRDFs, navigation.
%X Representing reality in computer graphics requires simulating the appearance of real-world materials. Bidirectional Reflectance Distribution Functions (BRDFs) are commonly used to perform this task, as they represent the appearance of a material through the quotient between the reflected radiance and the incoming irradiance at this point. Acquiring the BRDF of a real material is an expensive task due to its high dimensionality, so strategies to take advantage of already existing measurements are a promising solution. In this paper we present an approach to create BRDFs for new materials from a basis of tabular representations of BRDFs. We apply dimensionality reduction in this basis and then we perform a triangulation in the resulting reduced space. Thus, any position in this reduced space can be used to create a new material: using the triangulation, we estimate coefficients that can be used to find the BRDF of this new material by interpolating materials in the original space. In addition, we present a technique to navigate in this reduced space that enables the creation of several different materials from two materials in the basis. This approach provides a wide range of new materials based on real measurements without the need to acquire new BRDFs. We show that our navigation is coherent and that it yields a smooth transition between materials.
%@language en
%3 PID4960297.pdf


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