[Insight-users] (no subject) : How to save a vector image.

[Luis Ibanez]

Hi Josiane,

ITK can read Analyze, Dicom and Raw files.

However RAW is strongly discouraged given
that it is very easy to get it wrong. If you
have a RAW file, the best thing to do is to
create a MetaImage header for it, and pass
this header as filename to the ImageFileReader.

You will find instructions on how to do this
on the Data link of www.itk.org

     http://www.itk.org/HTML/Data.htm

---

In order to visualize deformation fields with VTK
you can use the vtkMetaImageReader (fron CVS VTK),
to read the deformation field in. You could also
write down the deformation field in a .vtk file
directly from the deformable registration program.

Once you read the field in VTK you can use the
vtkGlyph3D filter in order to place vectors in
a subset of points in the image.

An easier way to visualize the deformation field
is to use ParaView which is an open source application
providing a GUI front end for VTK filters.

You can download the sources and binaries from

       http://www.paraview.org

ParaView will read MetaImage files directly, and you
can simply connect a Glyph filter to the output of
the image reader.



  Regards,


     Luis


----------------------------------------------------
Josiane Yankam Njiwa--DEA Clarysse--Fin 11/04 wrote:

> Hi Luis,
> 
> Thanks for your answers. I don't have the type of file that you mean, i
> just have raw, img an Dicom files. Is there a way to avoid this problem?
> I have another question, how can I use vtk to visualize de field
> deformation which is calculated in itk?
> Thanks for your help.
> 
> Regards.
> 
> Josiane
> 
> 
> 
> 
> 
> 
>>Hi Josiane,
>>
>>
>>You are probably trying to use a file format that
>>doesn't support multiple components per pixel.
>>
>>Please try a file format such as MetaImage or VTK.
>>The corresponding filename extension will be .mhd
>>and .vtk.
>>
>>
>>Regards,
>>
>>
>>
>>      Luis
>>
>>
>>
>>-------------------------------------------------------
>>Josiane Yankam Njiwa--DEA Clarysse--Fin 11/04 wrote:
>>
>>
>>>Hi, Luiz
>>>
>>>Thanks for your help.I have read the source code and test it but i have
>>>a
>>>problem when i want to write the deformation field.
>>>I have this message error and i don't know how to correct it:More than
>>>one
>>>component per pixel not supported
>>>Can i have another help?
>>>
>>>Regards
>>>
>>>
>>>Josiane
>>>
>>>
>>>
>>>>Hi Josiane,
>>>>
>>>>
>>>>Please look at the following two examples:
>>>>
>>>>   Insight/Examples/Registration/
>>>>
>>>>               BSplineWarping1.cxx
>>>>               DeformableRegistration4.cxx
>>>>
>>>>
>>>>The first one uses a BSplineDeformableTransform in order
>>>>to warp an image. (e.g. like morphing).
>>>>
>>>>
>>>>The second is an example of deformable registration using
>>>>the ITK basic registration framwork and the BSplineDeformable
>>>>transform.
>>>>
>>>>
>>>>These two examples were added recently, so you may have to
>>>>update your CVS checkout.
>>>>
>>>>
>>>>   Regards,
>>>>
>>>>
>>>>
>>>>       Luis
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>-----------------------------------------------------
>>>>Josiane Yankam Njiwa--DEA Clarysse--Fin 11/04 wrote:
>>>>
>>>>
>>>>
>>>>>Hello,
>>>>>
>>>>>I like to use the itk class BSplineDeformableTransform to warp an
>>>>>image.
>>>>>I would like to know if somebody can give an example to me or can help
>>>>>me
>>>>>to make the pipeline which will do this work.
>>>>>I don't know exactely how to give the argument to this class and how to
>>>>>give my deformation field
>>>>>
>>>>>Thanks for your help
>>>>>_______________________________________________
>>>>>Insight-users mailing list
>>>>>Insight-users@itk.org
>>>>>http://www.itk.org/mailman/listinfo/insight-users
>>>>>
>>>>
>>>>
>>>>
>>>
>>
>>
> 
>