[ITK-users] PCA with ITK in Python

[Robert]

Hi Matt,

I can now call all needed functions so far in Python, I wrote 2 or 3 more
wrappers. Next step will be implementing them as soon as my dataset is
ready.
I will have a look into putting my .wrap up on GitHub for other users that
may need PCA functions as well.

Thanks for your help so far,

Best Regards,

Robert


On Mon, Apr 4, 2016 at 6:01 PM, Matt McCormick-2 [via ITK Insight Users] <
ml-node+s2283740n7588697h79 at n2.nabble.com> wrote:

> Hi Robert,
>
> Great to hear it is working for you!
>
>
> You are very close with the wrapping for PCAShapSignedDistanceFunction.
>
> To review the template args:
>
>
> http://www.itk.org/Doxygen/html/classitk_1_1PCAShapeSignedDistanceFunction.html
>
>   template<typename TCoordRep, unsigned int VSpaceDimension, typename
> TImage = Image< double, VSpaceDimension >>
>   class itk::PCAShapeSignedDistanceFunction< TCoordRep,
> VSpaceDimension, TImage >
>
> I think it is sufficient for now to always use "double" for TCoordRep.
> This is the type to represent positions in space. It has to be a
> floating point number, and the increased precision of "double" is
> often useful. In the wrapping variables, the variable for the double
> mangling is ${ITKM_D} (which expands to "D"), and the template
> parameters is ${ITKT_D} (which expands to "double").
>
> VSpaceDimension should be the dimension. This is just a number that
> can be used directly as its mangled value and as its template
> parameter.
>
> The image type should be a real-valued pixel type -- base it off of
> WRAP_ITK_REAL.  How about
>
>   itk_wrap_class("itk::PCAShapeSignedDistanceFunction" POINTER)
>     foreach(d ${ITK_WRAP_IMAGE_DIMS})
>       foreach(t ${WRAP_ITK_REAL})
>          itk_wrap_template("${ITKM_D}${d}${ITKM_I${t}${d}}"
> > "${ITKT_D}, ${d}, ${ITKT_I${t}${d}}")
>       endforeach()
>     endforeach()
>   itk_end_wrap_class()
>
> ?
>
> HTH,
> Matt
>
> On Mon, Apr 4, 2016 at 11:26 AM, Robert <[hidden email]
> <http:///user/SendEmail.jtp?type=node&node=7588697&i=0>> wrote:
>
> > What is wrong with this approach?
> > As .wrap file, I wrote:
> >
> >
> >
> >
> > Robert wrote
> >> itk_wrap_class("itk::PCAShapeSignedDistanceFunction" POINTER)
> >>   foreach(d ${ITK_WRAP_IMAGE_DIMS})
> >>    foreach(i ${ITK_WRAP_double})
> >>     foreach(t2 ${WRAP_ITK_REAL})
> >>      itk_wrap_template("${ITKM_D${t2}}${ITKM_UI${d}}${ITKM_I${i}${d}}"
> >> "${ITKT_D${t2}}, ${ITKT_UI${d}}, ${ITKT_I${i}${d}}")
> >>     endforeach()
> >>    endforeach()
> >>   endforeach()
> >> itk_end_wrap_class()
> >
> >
> > It does not work, what is wrong here'?
> >
> >
> >
> >
> > --
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