close all;
clear all;
%trojkatne
A = imread('zad4.jpg');
A = imresize(A,[512 512]);

x=[1/2 1 1/2];
h=x'*x;
a=sum(sum(h));
h=h/a;
B=imfilter(A,h)

figure(1);
image(A)
figure(2);
image(B)
%prostokatne
x=[1/2 1 1 1/2];
h=x'*x;
a=sum(sum(h));
h=h/a;
C=imfilter(A,h)

figure(3);
image(C)