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How to get bilateral symmetry axis?

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Diah
Diah 2012-12-3
I have an image, and I have extracted the region of interest (ROI). This ROI have bilateral symmetry shape. How can I get the bilateral symmetry axis for it?

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Matt J
Matt J 2012-12-12
编辑：Matt J 2012-12-12
Maybe as follows.
fa=@(X) norm(X(:) - reshape(flipud(X),[],1) );
fb=@(theta) fa(imrotate(TheROI,-theta));
AngleOfAxis = fminsearch(fb,0)

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