[Insight-developers] Inverse of the itkCentered3DEulerTransform

[Luis Ibanez]

Hi Antonio,

Thanks for pointing this out.

It seems that the correct method names should be

        SetRotationMatrix()
        GetRotationMatrix()

They are both implemented in Euler3DTransform
that is the superclass of the Centered3DEulerTransform.
This has passed unnoticed because a test was missing
for the Centered3DEulerTransform. We are now adding the
corresponding test.

However,...

Note that after the release of ITK 1.8, this method
was reworked and it now looks like:

------------------------------------------------
> 
> // return an inverse transformation
> template<class TScalarType>
> bool
> CenteredEuler3DTransform<TScalarType>::
> GetInverse( Self* inverse) const
> {
>   if(!Superclass::GetInverse(inverse))
>     {
>     return false;
>     }
> 
>   inverse->m_Center      =   m_Center;
>   inverse->m_Translation =  -m_Translation;
>   inverse->ComputeMatrix();
> 
>   return true;  
> 
> }
> 
------------------------------------------------

Please let us know if you find any other problems,



   Thanks,



       Luis



-------------------------
Anton Bardera wrote:
> Hi Insight Developers,
> 
> I would work with the class Centered3DEulerTransform, but when I apply the
> inverse function a problem occurs. I have checked the code and I think that
> maybe something is wrong. 
> 
> 
> Inverse( void ) const
> {
>   Pointer result = New();
>   
>   result->SetMatrix( this->GetMatrix() );
>   result->SetOffset( this->GetOffset() );
>   result->Superclass::Inverse();
>   
>   result->m_Center      =   m_Center;
>   result->m_Translation =  -m_Translation;
>   
>   result->ComputeMatrix();
> 
>   return result;
> }
> 
> The functions SetMatrix and GetMatrix are not implemented (or I can not find
> them!).
> Could you correct me or there is an error? If the error exists, what can we do?
> 
> Thanks in advance,
>    Anton
> 
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