[Insight-users] Re: Landmark Based transform initializer

[Kevin H. Hobbs]

On Thu, 2005-05-19 at 12:01 -0400, Karthik Krishnan wrote:
> Hi,
> 
> We've added a landmark based transform initializer class. Currently it only supports Rigid3D transforms. In other words the SetTransform method 
> should pass a VersorRigid3DTransform. We will try to add one for affine and corresponding rigid/affine ones for 2D, 
> 
> The solution is based on: 
>    Berthold K. P. Horn (1987),
>     "Closed-form solution of absolute orientation using unit quaternions,"
>     Journal of the Optical Society of America A, 4:629-642
>  http://people.csail.mit.edu/bkph/papers/Absolute_Orientation.pdf
> and flicked from Hybrid/vtkLandmarkTransform.cxx
> 
> 
> See Testing/Code/Common/itkLandmarkBasedTransformInitializerTest.cxx
> and
> Code/Common/itkLandmarkBasedTransformInitializer.txx/h
> 
> On a related note:
> Other landmark based transform initializers in ITK are:
> http://www.itk.org/Insight/Doxygen/html/classitk_1_1ThinPlateSplineKernelTransform.html
> http://www.itk.org/Insight/Doxygen/html/classitk_1_1ThinPlateR2LogRSplineKernelTransform.html
> http://www.itk.org/Insight/Doxygen/html/classitk_1_1ElasticBodyReciprocalSplineKernelTransform.html
> http://www.itk.org/Insight/Doxygen/html/classitk_1_1ElasticBodySplineKernelTransform.html
> http://www.itk.org/Insight/Doxygen/html/classitk_1_1VolumeSplineKernelTransform.html
> 
> 
> Thanks
> Regards
> Karthik
> 
> 
> 
> 
> 


Wow thanks, 

I was just trying out the VTK method and was about to post a link to
what I have so far.
http://crab-lab.zool.ohiou.edu/kevin/Slice_Landmark_Registration/

I'll take a look at the new ITK method.
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