[Insight-users] Resampling an image after a rigid body 3D registration

[Luis Ibanez]

Hi Remi,

There are several Rotation Transforms in ITK.


For a full list of Transforms please refer to the following
Doxygen page:

http://www.itk.org/Insight/Doxygen/html/group__Transforms.html


And to the ITK Software Guide

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

Section 8.8 "Transforms" in pdf-pages 424-442.


The transform that you probably want to use is the  VersorTransform,
or the VersorRigid3DTransform.


Note also that, since you already have a matrix, you could simply
use the itkAffineTransform that accepts a matrix and offset as
parameters. The transformation will be restricted to a rigid transfor
As long as your matrix is orthogonal.


For the family of Rigid Transforms please look at:

http://www.itk.org/Insight/Doxygen/html/classitk_1_1Rigid3DTransform.html




For examples on how to resample an image using the ResampleImageFilter
and the ITK Transforms please look at the ITK Softwar Guide in section
  6.9.4 "Resample Image Filter" in pdf-pages 254-284.

The source code of all the examples can be found in the directory


          Insight/Examples/Filtering/
                   ResampleImageFilter.cxx
                   ResampleImageFilter2.cxx
                   ResampleImageFilter3.cxx
                   ResampleImageFilter4.cxx
                   ResampleImageFilter5.cxx
                   ResampleImageFilter6.cxx
                   ResampleImageFilter7.cxx
                   ResampleImageFilter8.cxx
                   ResampleImageFilter9.cxx
                   ResampleOrientedImageFilter.cxx
                   ResampleVolumesToBeIsotropic.cxx
                   SubsampleVolume.cxx





    Regards,


       Luis


------------------
Remi Vieux wrote:
> Thanks Vince,
> I forgot to mention that the transform is not computed by ITK. I shall
> have a look at the itk::Transform class to see what I can do with it.
> There seems to have a Translation Transform, but no Rotation Transform?
> 
> Remi
> 
> Le lundi 28 août 2006 à 09:14 -0500, Vincent A. Magnotta a écrit :
> 
>>Remi,
>>
>>The ResampleImageFilter takes an ITK transform as well as an image to
>>resample. You should be able to simply take your transform (assuming
>>that the transform was created in ITK) and call the SetTransform method
>>for the class.
>>
>>Vince
> 
> 
> 
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