[Insight-users] THe output of MI application

[Luis Ibanez]

Hi Weihua,


By "MI application" are you referring to


   A) InsightApplications/
           MultiResMIApplication


or to


   B) InsightApplications/
       LandmarkInitializedMutualInformationRegistration


or to


   C) InsightApplications/
           MutualinformationEuler2DRegistration


or to


   D) InsightApplications/
               MRIRegistration




          Please be more specific...



---------------------------------------------

If you are referring to MultiResMIApplication, the Matrix is already
printed out directly from the file


     InsightApplications/
              MultiResMIApplication/
                               Common/
                                   MIMApplicationBase.txx


in line 157.


----------------------------------------------

For an explanation of what the "Final Parameters" mean, please
read the ITK Software Guide


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


In particular the Chapter on Image Registration.  You will
find the description of the parameters for the AffineTransform
in section 8.7.12, pdf-page 304.

The AffineTransform is internally represented by a Matrix
and a Vector. The Matrix is not only a rotation matrix, because
an Affine Transform can also represent anisotropic scaling
and Shearing.


In order to understand the conversions done during the registration
process you *must* read the chapter on image resampling from the
ITK Software Guide. This is Section 6.7.1, pdf-page 199.

Reading this section will save you a lot of time and unnecessary
suffering.




     Regards,



        Luis



--------------------------
weihuax at sfu.ca wrote:

> Hi:
> 
> I tried to use MI application for my own 3-D images. I know that the regular
> output is the Registered image. But I want to get the 'Transformation
> Matrix'.HOw can I get them?
> 
> What does 'Final PArameters' mean?
> 
> What does 'overall transform matrix' mean in the output display? Is it
> 'Rotation Matrix'?
> 
> What does 'overall transform offset' mean in the output display?Is it
> 'Translation Vector'? If it is 'Translation Vector', when I use two same
> images as input, why does the output of it is not [0 0 0] but [-12.885
> 0.530406 -26.3213]? Who can explain it to me?
> 
> Thanks
> 
> Weihua
> 
> 
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> 
>