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How to compute Correlation of red- and green-channel pixel values of skin lesion area

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Elias Unk
Elias Unk 2017-2-28
评论： Image Analyst 2017-3-1
I need to compute six correlation coefficients (red-green, green-blue, blue-red, red-grey, green-grey, and blue-grey) for both the whole sub-image and the lesion area respectively,one example shall do it for the 6 as of the same logic shall be applied,as well as calculating the Energy based on color extraction not texture or regionprops one(R,G,B,Gray) but one color space example shall do.. thanks

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Image Analyst
Image Analyst 2017-3-1
Did you try corr()?
coeff = corr(redChannel(:), greenChannel(:));
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Elias Unk
Elias Unk 2017-3-1
i do know they exist was just wondering if you have the formula cause i found 2 different ones to compute it and i mentioned them in my comment above.
Image Analyst
Image Analyst 2017-3-1
Use histogram() or histcounts() to get "Prob" in the first formula.
For the second formula, I have no idea whatsoever what "details" is.

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