Implement a function for image correlation

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shikun chen
shikun chen 2017-10-30
编辑： shikun chen 2017-10-30
Hi, I tried to implement a function, which can calculate the correlation of a matrix within a pattern operator function.
function[output] = correlation[input,pattern]
% Calculate the half side lenghts of the operator pattern.
h1 = (length(pattern)-1)/2;
h2 = h1;
% Implement the correlation.
[m,n] = size(input);
for i = 1:m
for j = 1:n
output(i,j) = 0
for u = -h1:h1
for v = -h2:h2
output(i,j) = output(i,j)+pattern(u,v)*input(i+u,j+v);
end
end
end
end
I want to calculate the inner values and setting the outer values to zeros. But i was stuck by the negative index, Any suggestion?

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