Mask = [1/9 1/9 1/9; 1/9 1/9 1/9; 1/9 1/9 1/9;];

im = imread('lena.pgm');
x = conv2(im,Mask);
figure(1);
imshow(im);
figure(2);
imshow(uint8(x)); %obraz bardziej wyg?adzony

F = fftshift(fft2(im)); 
M = log(abs(F)+1); 
M = (M./max(max(M)))*255; 
figure(3);
imshow(uint8(M));

F = fftshift(fft2(x)); 
M = log(abs(F)+1); 
M = (M./max(max(M)))*255; 
figure(4);
imshow(uint8(M));