how to implement this equation

2013 3 15
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Youssef Khmou
Youssef Khmou 2013-3-15
编辑：Youssef Khmou 2013-3-15

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hi,
given I and J of size MxN
M=6;N=4;
I=rand(M,N);
J=rand(M,N);
II=I.^2;
JJ=J.^2;
P=I.*J; % its Element wise product !!
numerator=sum(P(:));
denominator= sqrt(sum(II(:))*sum(JJ(:)));
NCC=numerator/denominator;
the result should be : 0<=NCC<=1,

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