Tags : NMI

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Nov 08, 2007

Entropy correlation coefficient

Post @ 12:19:20 | NMI

Unfortunately the term normalized mutual information is a bit confusing since there exists several definitions of it. They all share the same insights of producing a value in [0,1] such that a greater value means a better ``score''.

Mutual-information-based registration of medical images: a survey (2003)

The definition given is just the sum of the marginal entropies over the joint-entropy

nmi.png

It is moreover related to the entropy correlation coefficient as follows:
ecc.png