Fast Synthesis and Rendering of BTF on Arbitrary Surfaces
Zhan Zhang, Yue Qi, Yong Hu · 2008
This paper proposes an approach for BTF (Bidirectional Texture Function) synthesis and rendering.A BTF can be regarded as a kind of multi-dimensional texture, which preciously shows self-shadow, self-occlusion and inter-reflection appearance of object surfaces under varying view-and light-directions.However, it is difficult to use BTF on object surfaces because of its huge data and small size.Our method uses PCA algorithm to compress BTF data, and then we propose a Wang tiles based synthesis algorithm to solve its size problem.To keep consistency of multi-dimensional, we also propose an error determination algorithm for Wang tiles' construction in synthesis process.Using the method we proposed can render BTF on arbitrary object surfaces efficiently and quickly.