**3.1 Texture feature extraction**

In order to extract the texture features, a variety of methods have already been proposed in the literature and tested in practice. In this context, three families of texture feature extraction exist: statistical, spectral and structural methods. A successful texture classification or segmentation requires an efficient feature extraction methodology.

Two methods are discussed in this chapter. The first one is based on statistical analysis by cooccurrence matrices, and the second one is based on Fourier filtering.
