[Insight-users] Question on image to image metric implementations

[Luis Ibanez]

Hi Markus,

Please read the ITK Software Guide

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

in particular the Image Registration Chapter,
and the section on "Deformable Registration".

You can use a BSplineDeformableTransform as the
spatial transformation in the Image Registration
Framework.  From the resulting BSpline you can
obtain a deformation fields.

You will find coding examples in that chapter,
and the source code of the example is available
at


     Insight/Examples/Registration


You may also be interested in the Demons registration
filter and the FEMRegistrationFilter.


Regards,



    Luis



========================
Markus Weigert wrote:
> Hi all,
>  
> when using the ImageToImage metrics (for example
> itk::MutualInformationImageToImageMetric), one needs to provide
> a spatial transformation, which is used by the metric (for example to 
> compute derivatives).
> My question is what about using a deformation field (WarpImageFilter) 
> as "transformation",
> what may also be seen as the more general approach???
> One could consider the deformation field as a transformation as well 
> (with much more parameters, of course)
> and calculate derivatives with respect to the deformation values (to 
> control for example some registration process).
> Is the framework open for this and how expensive would it be to 
> implement such an approach (not only complexity
> of calculation but also effort of implementation)?
>  
>  
> Thanks for any suggestions,
> Markus  
> 
> 
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