[Insight-users] Compute of the normalized mutual Information ITK3/ITK4

[Paolo Zaffino]

Dear ITK community,
I'm using NormalizedMutualInformationHistogramImageToImageMetric 
function to compute the normalized mutual information.
I compile it on ITK 3.20.1 and on ITK 4.1 with no problem.
The strange thing is that I get a different value between the binary 
compiled against ITK3 and the binary compiled against ITK4.
It is "normal"? Is it a bug or between the two ITK versions is changed 
the way to compute this value?
Thanks a lot.
Paolo