[vtkusers] Applay transformatio to 3D-Imagedata

[Peter Böttcher]

Thanks for your help!

Now it works, but unfortunately there's still a problem. During the transformation in
vtkImageReslice the
origin for the rotations is the origin of the vtkImageData. But I don't find a way to define this
origin other than
the first voxel in the image data. By consequence I can' t produce a rotation of the image data
around its centre.

Is it possible to rotate a vtkImageData within vtkImageReslice about another point than the first
voxel(=origin)?

Peter.


David Gobbi schrieb:

> Hi Peter,
>
> In order to match the output of vtkImageReslice to a specific
> vtkImageData (called 'data' for example), you have to use
>
>  data UpdateInformation
>
>  reslice SetOutputSpacing [data GetSpacing]
>  reslice SetOutputOrigin [data GetOrigin]
>  reslice SetOutputExtent [data GetWholeExtent]
>
> also, when you apply a tranformation with vtkImageReslice you must
> invert the transformation first:
>
>  reslice SetResliceTransformation [transform GetInverse]
>
>  - David
>
> --
>   David Gobbi, MSc                    dgobbi at irus.rri.on.ca
>   Advanced Imaging Research Group
>   Robarts Research Institute, University of Western Ontario
>
> On Thu, 19 Apr 2001, Peter Böttcher wrote:
>
> > Dear vtk-users!
> >
> > I am currently working on a matching toll for 3D medical data. I read in
> > my data with vtkImageReader and
> > would like to apply a repeatable transformation to the vtkImageData. I
> > worked around with vtkImageReslice, but the reslicing changes the
> > matching volume. Is there a simple way to get the points of the image
> > data, transform them (12DOF) so I can apply my matching program to the
> > transformed points?
> > I can't find any filter which gets a transformation and vtkImageData as
> > input!!
> >
> > Thanks,
> >
> > Peter.
> >
> >
> > --
> > Dr. Peter Böttcher
> > |
> > |-Chirurgische Tierklinik
> > | Lehrstuhl für Allgemeine und Spezielle Chirurgie, einschließlich
> > Augenkrankheiten
> > |
> > |-Institut für TieranatomieI
> > |
> > Ludwig-Maximilians-Universität München
> > Veterinärstr. 13
> > D-80539 München
> > Germany
> >
> >
> >
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--
Dr. Peter Böttcher
|
|-Chirurgische Tierklinik
| Lehrstuhl für Allgemeine und Spezielle Chirurgie, einschließlich Augenkrankheiten
|
|-Institut für TieranatomieI
|
Ludwig-Maximilians-Universität München
Veterinärstr. 13
D-80539 München
Germany