Hey @lassoan and @dzenanz,
I’ve made a good progress understanding ImageToImageMetric and MattesMutualInformationImageToImageMetric classes. Read some key papers and guess I got where I need to work to achieve my goals.
Although, I still have some unsolved issues and I’d like to ask for some help.
I did not get clearly where in the code, if in these two classes or elsewhere, parzen windowed PDFs (marginal and joint) are calculated.
They calculate it for both fixed and moving Image?
I’m talking precisely about this term in Mattes (2003) PET-CT paper:
Also in the code they mention a Parzen Window term/argument. Are they talking about the
and 
terms the Eq. above?
Thanks again, buddies!