matlab中实现Gabor滤波器

1.spatialgabor.m描述gabor函数

% SPATIALGABOR - applies single oriented gabor filter to an image
%
% Usage:
%  [Eim, Oim, Aim] =  spatialgabor(im, wavelength, angle, kx, ky, showfilter)
%
% Arguments:
%         im         - Image to be processed.
%         wavelength - Wavelength in pixels of Gabor filter to construct
%         angle      - Angle of filter in degrees.  An angle of 0 gives a
%                      filter that responds to vertical features.
%         kx, ky     - Scale factors specifying the filter sigma relative
%                      to the wavelength of the filter.  This is done so
%                      that the shapes of the filters are invariant to the
%                      scale.  kx controls the sigma in the x direction
%                      which is along the filter, and hence controls the
%                      band