s096.m

简单的数字图像处理程序

% 经典频域理想高通滤波器  s096
clear;
I96=imread('2.jpg');
I960=rgb2gray(I96);
f=im2double(I960);
g=fft2(f);
g=fftshift(g);
[N1,N2]=size(g);
n=2;
d0=3;
n1=fix(N1/2);
n2=fix(N2/2);
for i=1:N1
   for j=1:N2
       d=sqrt((i-n1)^2+(j-n2)^2);
       if d>=2
       h(i,j)=1;
       else
       h(i,j)=0;
       end
    result(i,j)=h(i,j)*g(i,j);
end
end
result=ifftshift(result);
x2=ifft2(result);
x3=im2uint8(real(x2));
subplot(1,2,1),imshow(I960);
subplot(1,2,2),imshow(x3)