corr2 - 2-D correlation coefficient

Syntax

r = corr2(A,B)

Description

r = corr2(A,B) computes the correlation coefficient between A and B, where A and B are matrices or vectors of the same size.

Class Support

A and B can be numeric or logical. The return value r is a scalar double.

Examples

Compute the correlation coefficient between an image and the same image processed with a median filter.

I = imread('pout.tif');
J = medfilt2(I);
R = corr2(I,J) 

R =

    0.9959

Algorithms

corr2 computes the correlation coefficient using

where = mean2(A), and = mean2(B).

See Also

corrcoef | std2

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