[Insight-users] CenteredVersorTransformInitializer

[Luis Ibanez]

Hi Martin,


The implementation of this class is not finished.

Once it is done,
it will contain code similar to the one in

    Insight/Code/Common/
        itkLandmarkBasedTransformInitializer.txx


where the rotation in 3D space is estimated by
using the eigen vectors of the Moments matrix.


Please feel free to report this as a bug of
"pending implementation" into the phpBugTracker.


Or if you feel adventurous, you are welcome to
transfer the code from the

     itkLandmarkBasedTransformInitializer

into the

     CenteredVersorTransformInitializer


Please let us know if you find any problems,


    Thanks


       Luis


-----------------------
Martin Urschler wrote:

> hello
> 
> can anybody explain to me what the 
> itk::CenteredVersorTransformInitializer is doing in its 
> InitializeTransform method besides calling the superclass method?
> 
> template < class TFixedImage, class TMovingImage >
> void
> CenteredVersorTransformInitializer<TFixedImage, TMovingImage >
> ::InitializeTransform() const
> {
> 
>   // Compute moments and initialize center of rotaion and translation
>   this->Superclass::InitializeTransform();
> 
>   typedef typename Superclass::FixedImageCalculatorType::MatrixType 
> FixedMatrixType;
>   typedef typename Superclass::MovingImageCalculatorType::MatrixType 
> MovingMatrixType;
> 
>   FixedMatrixType   fixedPrincipalAxis  = 
> this->GetFixedCalculator()->GetPrincipalAxes();
>   MovingMatrixType  movingPrincipalAxis = 
> this->GetMovingCalculator()->GetPrincipalAxes();
> 
> }
> 
> 
> IMHO the fixed- and movingPrincipalAxes that are calculated are never 
> used for anything, or did I miss something?
> 
> 
> Martin
> 
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