[Insight-users] Re: Normalized Mutual Information Histogram ImageToImageMetric

[Luis Ibanez]

Hi Vineet,

The version of NormalizedMutualInformation implemented in
the class

http://www.itk.org/Insight/Doxygen/html/classitk_1_1NormalizedMutualInformationHistogramImageToImageMetric.html

is


   [  H(A) + H(B) ] /  H(A,B)


and it is described in the book

   "Medical Image Registration"

by Hajnal, Hill, Hawkes.


The book can be consulted online at

   http://www-ipg.umds.ac.uk/d.hill/hhh/

this link is listed among many other
resource at the itk Documentation page

http://www.itk.org/HTML/Documentation.htm

The equation for the Normalized Mutual Information
implemented in ITK is shown as Eqn.(30) in Chapter 3.

   http://www-ipg.umds.ac.uk/d.hill/hhh/03/03.pdf

Note that once having this class, it is almost
trivial to implement also equations (28) and (29).

      Almost sounds like a good
      homework for an ITK course  :-)


We are adding this same information to the header
file of the class, so this should show up in
Doxygen tomorrow after the documentation is
regenerated overnight.


Please let us know if you have further questions,


    Thanks


      Luis



-----------------------
Vineet Kulkarni wrote:

> Hi,
> Could you please tell me if the
>   itk::NormalizedMutualInformationHistogramImageToImageMetric 
> is based on any paper, the documentation doesn't cite any. 
> Thanks,
> Regards,
> Vineet Kulkarni
> 
>