Wavelet-based texture features: a new method for sub-band characterization

This paper introduces a new strategy to describe wavelet sub-bands in the scope of texture characterization. While most wavelet-based texture features found in the literature do not use spatial information contained in the wavelet domain, the new approach suggests to represent sub-bands of a texture by shape parameters. This new technique is called wavelet geometrical features (WGF), and is coming from a multiresolution extension of Chen´s statistical geometrical features (SGF). Experiments on the full Brodatz database show the efficiency of the WGF over the SGF and the traditional wavelet energy signature.