[Insight-users] Question about generating and composing deformation fields

[Anja Ende]

Many thanks for this Brian and Tom.

I am sure I can sort out my problems now.

Cheers,
Pankaj

On 27 August 2010 07:45, Tom Vercauteren <tom.vercauteren at m4x.org> wrote:
> Hi Anja,
>
> The required components for you application can be found in elastix and ITK:
> http://elastix.isi.uu.nl/doxygen/a00157.html
> http://elastix.isi.uu.nl/doxygen/a00002.html
> http://www.itk.org/Doxygen/html/classitk_1_1TransformToDeformationFieldSource.html
>
> Another approach would be to rely on
> http://www.itk.org/Doxygen/html/classitk_1_1TransformToDeformationFieldSource.html
> https://gforge.inria.fr/scm/viewvc.php/trunk/Registration/itkDisplacementFieldCompositionFilter.h?view=markup&root=ttk
>
> Hope this helps,
> Tom
>
> On Fri, Aug 27, 2010 at 00:21, Anja Ende <anja.ende at googlemail.com> wrote:
>> Hello everyone,
>>
>> I have a series of affine and non-rigid transformations and what I
>> would like to do is create one single deformation field by combining
>> these deformations and then use this final deformation field to
>> resample my image.
>>
>> So I need to do two different compositions (I am not sure if I should
>> compose or add these deformation fields. The formulation of
>> composition is not completely clear to me as well).
>>
>> 1: I have an affine transformation and a non-rigid transformation. So,
>> given an initial image, how can I create a deformation field that
>> encapsulates these two transformations.
>> 2: I have a non-rigid transformation followed by an affine
>> transformation. Again, I would like to create a deformation field that
>> encapsulates them.
>>
>> I would be very grateful if anyone could point out how I might achieve
>> this in ITK. Also, maybe more experienced people doing medical image
>> registration could share some information on how deformation foelds
>> are combined (addition vs composition)
>>
>> Many thanks for any help you can give me,
>>
>> Anja
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>



-- 
Cheers,

Anja