How to calculate the delta E as a single value

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hamed abdulaziz el 15 de En. de 2014

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https://la.mathworks.com/matlabcentral/answers/112537-how-to-calculate-the-delta-e-as-a-single-value

Editada: hamed abdulaziz el 16 de En. de 2014

Hi all, I tried this demo on http://www.mathworks.com/matlabcentral/answers/73741#comment_145951 but I got the delta E as a matrix with the double values, can I have delta E as a singl value to give me an indication for edges found;as Image Analyst(with thanks to him of course)said:"An edge will have a high delta E while non-edges will have low delta E"?