cross correlation matrix dimension

clc;
close all;
clear all;
X=[1 1 1;1 1 1]
H=[1 2; 3 4; 5 6]

[M N]=size(X);
[P Q]=size(H);
k=1;
l=2;
for m=1:1:M;
    for n=1:1:N;,
        C=sum(sum(X(m,n).*conj(H(m+k,n+l))))  
    end
end

[Image Analyst]

Other than "How can I format my code in the Answers forum?" which I did for you and you can do for yourself after you read this, do you have another question?

Answer 1

[Roger Stafford]

The nested for-loops are not doing what you appear to have in mind. You are doing a summation on scalars there. Also some of the column indices for the H array you have defined will fall out of its range and you will get an error message.

Ignoring the problem of out-of-range indices, you appear to want this:

 k = 1;
 l = 2; % <--Lowercase L
 C = sum(sum(X.*H(k+1:k+M,l+1:l+N))); % <--Lowercase L

As Image Analyst indicates, you should always state what your question is.