How to calculate entropy of color image in matlab?

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Aarach Sap
Aarach Sap am 22 Feb. 2017
Kommentiert: Image Analyst am 19 Aug. 2017
I want to calculate entropy of color image. I found the command entropy(img) for the grayscale image. I dont know how to find entropy for a color image in matlab. Please help me.
  1 Kommentar
KSSV
KSSV am 22 Feb. 2017
It accepts RGB matrix i.e 3D matrix too. But I am not sure of the value.

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Walter Roberson
Walter Roberson am 22 Feb. 2017
reshape() the image to a vector and call entropy on that.
  4 Kommentare
Walter Roberson
Walter Roberson am 19 Aug. 2017
If you have a binary mask, then use it to index the image, and the result will be a vector; you can calculate the entropy of the vector.
Image Analyst
Image Analyst am 19 Aug. 2017
entropyWithinMask = entropy(grayImage(mask));

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