Modeling Bidirectional Texture Functions with Multivariate Spherical Radial Basis Functions

Yu-Ting Tsai, Kuei-Li Fang, Wen-Chieh Lin, Zen-Chung Shih
2011 IEEE Transactions on Pattern Analysis and Machine Intelligence  
This paper presents a novel parametric representation for bidirectional texture functions. Our method mainly relies on two original techniques, namely, multivariate spherical radial basis functions (SRBFs) and optimized parameterization. First, since the surface appearance of a real-world object is frequently a mixed effect of different physical factors, the proposed sum-of-products model based on multivariate SRBFs especially provides an intrinsic and efficient representation for heterogenous
more » ... aterials. Second, optimized parameterization particularly aims at overcoming the major disadvantage of traditional fixed parameterization. By using a parametric model to account for variable transformations, the parameterization process can be tightly integrated with multivariate SRBFs into a unified framework. Finally, a hierarchical fitting algorithm for bidirectional texture functions is developed to exploit spatial coherence and reduce computational cost. Our experimental results further reveal that the proposed representation can easily achieve high-quality approximation and real-time rendering performance. Index Terms-Reflectance and shading models, bidirectional texture functions, parameterization, spherical radial basis functions.
doi:10.1109/tpami.2010.211 pmid:21135438 fatcat:gy27xmnzbbgyld6alt4g4ifnee