% imgede blok temelli ortalama ve standart sapma hesabı
clear all;
clc;
close all;
b=4;    % blok boyutu

I = double(imread ('cameraman.tif'));
[h,w]=size(I);
figure; imshow(uint8(I))

ortalama = zeros(h/b,w/b);
st_sapma = ortalama;

for i=1:b:h-b+1
    for j=1:b:w-b+1
        ortalama((i+b-1)/b,(j+b-1)/b) = mean2(I(i:i+b-1,j:j+b-1));
        st_sapma((i+b-1)/b,(j+b-1)/b) = std2(I(i:i+b-1,j:j+b-1));
    end
end

figure; imshow(uint8(ortalama))
figure; imshow(uint8(st_sapma))

Published with MATLAB® 7.5