url = 'http://geo.fsv.cvut.cz/user/gin/git1/matlab/img/';
K1 = imread(strcat(url,'kucharky.tiff'));
figure(1), imshow(K1);
K2 = imnoise(K1, 'gaussian', 0, 0.005);
figure(2), imshow(K2);
K3 = wiener2(K2, [5 5]);
figure(3), imshow(K3);

K4 = medfilt2(K2);
figure(4), imshow(K4);
