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Gabor filter bank generator

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from Gabor filter bank generator by Samir Ben Abid
Routine to generate Gabore filter bank.

[filter_bank ang_s]=gabor_bank(bank_size,sigma_x,sigma_y,freq) 
function [filter_bank ang_s]=gabor_bank(bank_size,sigma_x,sigma_y,freq)

ang_s=fix(linspace(0,180,bank_size));
angs=deg2rad(ang_s);

filter_bank=cell(length(angs),1);
for i=1:length(angs),
    filter_bank{i}=gabor_fn(sigma_x,sigma_y,angs(i),freq);
end

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