How can i calculate the entropy of the region of interest of an RGB image?
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I know how to calculate the entropy of an RGB image.First ,vectorize the image and finally use it as a parameter of the entropy() function.
image_vector = double(original_RGB_image(:));
entropy_of_the_image = entropy(image_vector);
But what should we do to calculate the entropy of the region of interest of image?
I know one approach.Somehow,convert it into a black-white image(white=1) and use the inverse of the black-white image as a parameter of the original RGB image.I think,then the background color will be black .But it doesnot work.The background(sourrounding) became blue(something like that) instead of black? what should i do? Here is my code...