The conventional 2-D spectrogram can be regarded as a bilinear image representation. It then is, within the framework of texture discrimination, compared with the 2-D Wigner-Ville distribution (WVD) that is the most fundamental bilinear image representation. The theoretical properties, particularly relevant to texture analysis, of these two types of bilinear representations are discussed, and their ability to discriminate textures is compared with the aid of examples on both synthesized and natural texture images.
['Yue Min Zhu', 'R. Goutte']
A comparison of bilinear space/spatial-frequency representations for texture discrimination