Abstract
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.
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