[Insight-users] Simple join-histogram image (MutualInformation)

[Luis Ibanez]

Hi Lars,


You may want to look at the code of the Example:


            ImageMutualInformation1.cxx


In Insight/Examples/Statistics.


This code illustrates how to compute the Joint Histogram of
two images, and then use it to compute Mutual Information,
(no registration involved).

The two images are assumed to have the same image grid
(dimension and number of pixels..)

This example is described in the ITK Software Guide


     http://www.itk.org/ItkSoftwareGuide.pdf

In section: 10.3.2 "Image Information Theory",
in particular in pdf-page: 699 - 704.


--

Also, since you are writing the joint histogram in the form
of a 2D image, you may want to use one of the following
filters:


   itkHistogramToEntropyImageFilter.h
   itkHistogramToIntensityImageFilter.h
   itkHistogramToLogProbabilityImageFilter.h
   itkHistogramToProbabilityImageFilter.h


They are available in the directory:


     Insight/Code/Numerics/Statistics


The output of these filter can be passed to an
ImageFileWriter.



    Regards,


       Luis



--------------------
Lars Nygard wrote:
> Hi,
> Im trying to make a program that makes the jointhistogram
> of two images. So I don't want to register or optimize anything.
> The program compiles good but when I run it I get an error
> from windows and the program aborts with no feedback.
> I don't know what the problem is. If anybody can help me
> I would really appreciate it. The program file is in the attachement.
> greets
> Lars Nygard
> 
> 
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