process_image.m

It will take a DCT of Jpg image.

clear
clc
a=imread('cameraman.tif');
for (i=1:8:256)
    for (j=1:8:256)
        A=a(i:i+7,j:j+7);
        o=DCT8(A);
        out(i:i+7,j:j+7)=o;
    end
end