Jornal article

Filip J., Haindl M.

International Journal of Computer Mathematics

2007

9 (2007)

1267-1283

0020-7160

prof. Ing. Michal Haindl, DrSc. (ÚTIA - Oddělení rozpoznávání obrazů)

Texture Synthesis, BTF, Rough Texture, MRF model, BRDF, clus

The highest fidelity representations of realistic real-world materials currently comprise Bidirectional Texture Functions (BTF). The BTF is a six dimensional function depending on view and illumination directions as well as on planar texture coordinates. The huge size of such measurements, typically in the form of thousands of images covering all possible combinations of illumination and viewing angles, has prohibited their practical exploitation and obviously some compression and modelling method of these enormous BTF data spaces is inevitable. The two proposed approaches combine BTF spatial clustering with cluster index modelling by means of efficient Markov random field models. The methods allow to generate seamless cluster index of arbitrary size to cover large virtual 3D objects surfaces.