clear all;
close all;
I = im2double(imread('lena_bw.jpg'));
Y=fftshift(fft2(I));
figure(1);
imshow(Y);
M=MaskaDolnoprzepustowa(Y,20);
M=fftshift(M);
figure(2);
imshow(M);
J=ifft2(M);
figure(3); 
imshow(J);


