[ITK-users] [ITK] Extracting image coordinate transform matrix

Tue Aug 1 11:59:35 EDT 2017

Ramana,

Have you looked at the InvertDisplacementFieldImageFilter?
https://itk.org/SimpleITKDoxygen/html/classitk_1_1simple_1_1InvertDisplacementFieldImageFilter.html

It was my understanding that the above is the preferred inversion algorithm. 

I actually have the wrapping code for  FixedPointInverseDisplacementFieldImageFilter sitting around. I can make this available if needed. However, documentation improvements need to be made to these classes to clarify the differences.

Please add a feature request on Github if this is something you really need:
https://github.com/SimpleITK/SimpleITK/issues

Thanks,
Brad

On 8/1/17, 11:48 AM, "Ramana C" <rc1515 at ic.ac.uk> wrote:

    Hi Ziv,

    Thanks very much, that's exactly what I needed.

    I needed the matrix for some code I'm writing to invert a displacement
    field. The fixed-point deformation field inversion isn't included in the
    SimpleITK python libraries, so I'm going about implementing it myself.

    Anyway, thanks very much for the help again!

    Ramana

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