Correlation between two images ..

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Farjana Yeasmin
Farjana Yeasmin 2014-11-29
回答： Image Analyst 2014-11-29
I am doing a project on steganography . I have been asked to calculate the correlation between stego image and real image . plz someone can help me with the code of correlation ,,, plz .

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Image Analyst
Image Analyst 2014-11-29
Well I'm no stego expert but I thought usually they would use psnr or ssim to compare the concealing image and the original cover image, or the original message image and the recovered/retrieved hidden image. Both of those functions are built in to the Image Processing Toolbox.

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Youssef Khmou
Youssef Khmou 2014-11-29
if you mean correlation coefficient, you can program manually the function or use corr2 :
corr2(A,B); % returns a scalar

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