photoRGB = imread('kck/jankos.jpg');
photoHSV = rgb2hsv(photoRGB);
[x, y, z] = size(photoRGB);
photoAfterHSVFilter = ((photoHSV(:,:,1) <= 0.1 | photoHSV(:,:,1) >= 0.9) & ...
                       (photoHSV(:,:,2) >= 0.2 & photoHSV(:,:,2) <= 0.6) & ...
                       (photoHSV(:,:,3) >= 0.4));
scale = 0.4;
photoAfterScale = uint8(imresize(medfilt2(imresize(photoAfterHSVFilter, scale)),[x, y]));

cuttedPhoto(:,:,1) = photoRGB(:,:,1) .* photoAfterScale;
cuttedPhoto(:,:,2) = photoRGB(:,:,2) .* photoAfterScale;
cuttedPhoto(:,:,3) = photoRGB(:,:,3) .* photoAfterScale;
subplot(2,2,1);
imshow(photoRGB);
subplot(2,2,2);
imshow(photoAfterHSVFilter);
subplot(2,2,3);
imshow(photoAfterScale .* 255);
subplot(2,2,4);
imshow(cuttedPhoto);