[Insight-users] How to do an affine transform on one 3D point set in ITK?

[Andreas Schuh]

Well, the ITK Software Guide isn't up to date. Many of the mesh stuff  
might be introduced in later versions of ITK. Have a look at the  
recent doxygen docu. That's actually the place I go to find the  
information I need on what's available and how to use it (this was  
also the source that told me that such a filter exists, actually).

Am 21.03.2009 um 00:14 schrieb Tao Dai <uniquedai at gmail.com>:

> Hi, Andreas:
>
> Thanks!
>
> however I can't find the TransformMeshFilter usage in the  
> ItkSoftwareGuide.  Do I miss anything?
>
> Tao
>
> On Fri, Mar 20, 2009 at 11:56 AM, Andreas Schuh <andreas.schuh.84 at googlemail.com 
> > wrote:
> Hi Tao,
>
> in ITK you can use itk::Mesh to represent your data and apply the  
> itk::TransformMeshFilter to transform the points using an  
> itk::AffineTransform. Be aware that the transformation differs for  
> itk::Point and itk::Vector.
>
> --
> regards
> Andreas
>
> Am 20.03.2009 um 19:42 schrieb Andreas Schuh <andreas.schuh.84 at googlemail.com 
> >:
>
>
> Hi Tao,
>
> there might be a way to do this with ITK. However, from the kind of  
> your data, the VTK might be better suited. The data you describe is  
> represented in VTK as vtkUnstructuredGrid, where the cells are 0D  
> (i.e. points). This data can be transformed using the  
> vtkTransformFilter.
>
> Whether you may want to use the VTK instead of ITK is dependent on  
> your further purpose.
>
> --
> regards
> Andreas
>
> Am 20.03.2009 um 18:49 schrieb Tao Dai <uniquedai at gmail.com>:
>
> Hi, All:
>
> I have a 3D point set (not an image) to be affine transformed to  
> another 3D point set. I tried but failed.  Anybody knows how to  
> implement this using ITK?
>
> Thank you!!
>
> Tao
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