Gabor filter-bank                       

• Gabor filters provides both Frequency -stationary and periodic structure- and Spatial locality.
• Allow analysis of difference spatial variation.
• Motivated by studies of human perception, Gabor filters is proposed as a texture-segmentation model.
• Gabor filter is a Gaussian envelope modulated by a sinusoidal wave along the x-axis.

• A Gabor filter-bank consists of Gabor filters with Gaussians of different sizes modulated by sinusoidal plane waves of different orientations from the same Gabor-root filter.

                                   

• Given image I(x,y) discrete Gabor filter output is given by the convolution.

                                  

• Computation of the energy features

                                  

• Feature vector (with S=4 and K=8)