s100.m

简单的数字图像处理程序

% 经典频域带阻滤波器  s100
clear;clear all;
I100=imread('2.jpg');
I1000=rgb2gray(I100);
f=im2double(I1000);
g=fft2(f);
g=fftshift(g);
[N1,N2]=size(g);
n=2;
d1=2;
d2=40;
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 d2>d>d1
         h(i,j)=0;
     else h(i,j)=1;
     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(I1000);
subplot(1,2,2),imshow(x3)