[Insight-users] point set to point set registration using deformable method (thin plate spline)

[Luis Ibanez]

Hi Tao,

The itkThinPlateSplineKernelTransform doesn't provide computation of
Jacobians. The API is there, but the method has not been implemented.

You should therefore use this Transform only with optimizers that do not
require derivatives from the Metric function.

You may want to look at the Amoeba optimizer and the OnePlusOne
evolutionary optimizers.

   or....

if you feel courageous today, it will be great if you give it a shot at
implementing the GetJacobian() method in the superclass:
itkKernelTransform, and contribute it to the toolkit.     :-)



      Regards,


            Luis



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On Wed, Oct 7, 2009 at 5:14 PM, Tao Dai <uniquedai at gmail.com> wrote:
> Hi, list:
>
> I am trying to register two 3D point sets with different length and without
> known correspondence, thus I choose ICP. I mostly used the code of
> "IterativeClosestPoint1.cxx" by replacing the transform type to
> "itkThinPlateSplineKernelTransform". Tthe ICP went through successfully but
> obtained NULL output parameters.
>
> My question is : Is the ICP working with ThinPlateSpline?  I don't see any
> problem to use this way but can't figure it out why bad output happens. The
> testing data I used are two sets of points, one set is 3D scaled version of
> the other.
>
> I appreciate any help and inputs.
>
> Tao
>