[Insight-users] Passing ITK objects from Python to C code of a Python extension

[Gaëtan Lehmann]

Le 20 juin 07 à 21:57, Sven Prevrhal a écrit :

> Thanks Gaëtan,
> Will WrapITK work on Win XP? I saw some warnings.

it works for sure with visual studio express 2005

> Also, where do I find the
> insight journal archives?
>

http://insight-journal.org/

>
> Thanks,
> Sven
>
> -----Original Message-----
> From: Gaëtan Lehmann [mailto:gaetan.lehmann at jouy.inra.fr]
> Sent: Wednesday, June 20, 2007 12:23 PM
> To: Sven Prevrhal
> Cc: insight-users at itk.org
> Subject: Re: [Insight-users] Passing ITK objects from Python to C  
> code of a
> Python extension
>
>
> Hi Sven,
>
> You should use WrapITK to do that. Extending WrapITK is very easy in
> python, and you can find several examples in the ExternalProjects
> directory, and in my contributions to the insight journal.
>
> Regards,
>
> Gaëtan
>
>
> Le 20 juin 07 à 04:32, Sven Prevrhal a écrit :
>
>> Since there are apparently some issues with converting strings and
>> vectors
>> of strings to/from Python and ITK and I have not figured out how
>> to, from
>> Python,
>> 	- use DICOMSeriesFileNames to get a set of file names pertaining to
>> one SeriesUID
>> 	- read it with ImageSeriesReader
>> 	- Use ConnectITKToVTK to transfer the images over to VTK for
>> visualization
>>
>> I thought I would write a Python extension that would accept a
>> SeriesUID,
>> execute those steps and return a vtkImageData object to Python for
>> further
>> processing. But I fail to figure out how to pass an ITK object to my
>> Python/C code.
>>
>> I was thinking something like this for Python extension .cxx file -
>>
>> static PyObject *
>> PyITKHelloWorld_ITKHelloWorld(PyObject *self, PyObject *args)
>> {
>> 	ImageType::Pointer argImage;
>> 	PyObject * arg1;
>>
>>     if (!PyArg_ParseTuple(args, "O", &arg1))
>>         return NULL;
>> 	
>> 	// THIS LINE DOES NOT COMPILE
>> 	argImage= (itk::Image< unsigned short, 3 >::Pointer) arg1;
>> ...
>>
>>
>> and in Python,
>>
>> im = itkImageUS3_New()
>> PyITKHelloWorld.ITKHelloWorld(im.GetPointer())
>>
>> ...
>>
>>
>> Needless to say, the code does not compile (can import my extension
>> though,
>> and I have a very simple method without passing an ITK object that
>> works
>> just fine, so the basics are OK). Am I completely off? Or what do I
>> need to
>> do?
>>
>> Thanks!
>>
>> Sven
>>
>>
>>
>>
>> _______________________________________________
>> Insight-users mailing list
>> Insight-users at itk.org
>> http://www.itk.org/mailman/listinfo/insight-users
>
> --
> Gaëtan Lehmann
> Biologie du Développement et de la Reproduction
> INRA de Jouy-en-Josas (France)
> tel: +33 1 34 65 29 66    fax: 01 34 65 29 09
> http://voxel.jouy.inra.fr
>
>
>
>
>

--
Gaëtan Lehmann
Biologie du Développement et de la Reproduction
INRA de Jouy-en-Josas (France)
tel: +33 1 34 65 29 66    fax: 01 34 65 29 09
http://voxel.jouy.inra.fr



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