带阻滤波器对周期性噪声消除matlab实现

I=imread('pout.tif'); [m,n]=size(I); J=I; for i=1:m for j=1:n J(i,j)=I(i,j)+20*sin(20*i)+20*sin(20*j);%增长周期性噪声 end end IF=fftshift(fft2(I)); JF=fftshift(fft2(J)); IF=log(1+abs(IF)); JF

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