%?GABORFILTER?Bi-dimensional?Gabor?filter?with?DC?component?compensation.
%???[GGABOUT]=GABORFILTER（ISFWP）?filters?the?input?image?I?with?the?2D
%???Gabor?filter?G?described?by?the?parameters?S?F?W?and?P?to?create?the?
%???output?filtered?image?GABOUT.
%???This?version?of?the?2D?Gabor?filter?is?basically?a?bi-dimensional?
%???Gaussian?function?centered?at?origin?（00）?with?variance?S?modulated?by
%???a?complex?sinusoid?with?polar?frequency?（FW）?and?phase?P?described?by?
%???the?following?equation:
%
%???G（xySFWP）=k*Gaussian（xyS）*（Sinusoid（xyFWP）-DC（FSP））
%???where:????????????????????????
%???????Gaussian（xyS）=exp（-pi*S^2*（x^2+y^2））
%???????Sinusoid（xyFWP）=exp（j*（2*pi*F*（x*cos（W）+y*sin（W））+P）））
%???????DC（FSP）=exp（-pi*（F/S）^2+j*P）
%
%???PS:?The?term?DC（FSP）?compensates?the?inherent?DC?component?produced?
%???by?the?Gaussian?envelop?as?shown?by?Movellan?in?[1].
%
%	Tips:
%???????1）?To?get?the?real?part?and?the?imaginary?part?of?the?complex?
%???????filter?output?use?real（gabout）?and?imag（gabout）?respectively;
%?
%???????2）?To?get?the?magnitude?and?the?phase?of?the?complex?filter?output?
%???????use?abs（gabout）?and?angle（gabout）?respectively.

%	Author:?Stiven?Schwanz?Dias?e-mail:?stivendias@gmail.com
%???????????Cognition?Science?Group?Informatic?Department
%???????????University?of?Esp韗ito?Santo?Brazil?January?2007.
%
%???References:
%???????[1]?Movellan?J.?R.?-?Tutorial?on?Gabor?Filters.?Tech.?rep.?2002.

function?[GGABOUT]=gaborfilter（ISFWP）;

if?isa（I‘double‘）~=1
????I=double（I）;
end
size=fix（1.5/S）;?%?exp（-1.5^2*pi）?%k=2*pi*S^2;
%F=S^2/sqrt（2*pi）;
k=1;
for?x=-size:size
????for?y=-size:size
????????G（size+x+1size+y+1）=k*exp（-pi*S^2*（x*x+y*y））*...
????????????（exp（j*（2*pi*F*（x*cos（W）+y*sin（W））+P））-exp（-pi*（F/S）^2+j*P））;
????end
end

GABOUT=conv2（Idouble（G）‘same‘）;

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????文件????????2093??2006-12-30?02:14??colormaps.mat
?????文件????????1903??2007-01-02?19:33??gaborfilter.m
?????文件?????????857??2008-05-31?16:15??gabortest.m
?????文件???????69214??2007-05-22?20:18??lena.jpg
?????文件????????1340??2009-05-19?23:41??license.txt