[Insight-users] Which Kernel transform to use with Point Set Registration

[Aya El Gebeely]

Hi Luis, Thanks a lot for your reply..

I can have the same number of point set for the both images, so I selected
itkThinPlateSplineKernelTransform.h to use as my transform method..

It gives me the mappedPoints, but what I need is the transformation values
[i.e Transform along X and Y] as well as the Transformation Matrix..

To be able to apply the transformation on the image we want to register..

I'll be glade to show me how I could get these values ..

Thanks in advance,
Aya R.


On 18 February 2010 01:54, Luis Ibanez <luis.ibanez at kitware.com> wrote:

> Hi Aya,
>
>
> Do you need a Deformable Transform ?
>
>
> Typically you should start a point set to point set registration
> by just using a Rigid Transform.  For example by using
> ICP (iterative closest points), as described in the examples:
>
> Insight/Examples/Registration/
>    IterativeClosestPoint1.cxx
>    IterativeClosestPoint2.cxx
>    IterativeClosestPoint3.cxx
>
>
> ....
>
> but..
>
> Should you really need to use KernelTransforms, please note
> that they will require you to provide point correspondences.
>
> That is, you should know what point of the FixedCollection of
> points, correspond to what point of the MovingCollection of
> points.
>
> If you have such correspondences, then you could use any
> of the following KernelTransforms:
>
>       itkThinPlateSplineKernelTransform.h
>       itkThinPlateR2LogRSplineKernelTransform.h
>       itkElasticBodySplineKernelTransform.h
>       itkElasticBodyReciprocalSplineKernelTransform.h
>       itkVolumeSplineKernelTransform.h
>
>
>
>     Regards,
>
>
>             Luis
>
>
>
> ------------------------------------------------------------
> On Wed, Feb 17, 2010 at 9:49 AM, Aya El Gebeely
> <aya.elgebeely at symbyo.com> wrote:
> > Dear ITk Users,
> >
> >  Currently I'm using Point Set to Point Set registration method, in order
> to
> > register two medical images, given set of points for each image [fixed &
> > moving]
> >
> > I need to use KernelTransforms, so which one to use, it was mentioned in
> the
> > ITk S/W guide to use any of the itk::KernelTransform family of classes..
> >
> > Do you have any recommendations ?
> >
> > Thanks in advance,
> >
> > Aya R. ElGebeely
> >
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