[Insight-users] MultiResMIRegistration - QuaternionRigid 2 Affine

[Luis Ibanez]

Hi Christos,


The simplest way of initializing the Affine transform is
to let it do the computations for you. If you use the
CenteredAffine transform along with the CenteredTransform
initializer you can do something like the following:


    transform->SetIdentity();

    transformInitializer->SetFixedImage( fixedImage );
    transformInitializer->SetMovingImage( movingImage );
    transformInitializer->SetTransform( transform );
    transformInitializer->MomentsOn();
    transformInitializer->InitializeTransform();

    registration->SetInitialTransformParameters(
                        transform->GetParameters() );




Regards,


    Luis



-----------------------------
Christos Panagiotou wrote:

> 
> Dear all
> 
> i would like to ask on more question related with my previous email
> 
> in the initialization of the MIMRegistrator the transforms         what 
> would be good initial values for the m_InitialParameters array (12 
> parameters)
> 
> the last 3 are initialized according to the translation scaling what 
> would be good values for the first 6 params that represent 
> rotation,scaling and shearing?
> 
> identity matrix?
> 
> finally if the matrix is something like the following
> 
> x11 x12 x13
> x21 x22 x23
> x31 x32 x33
> 
> the m_InitialParameters[1] is the x11
>    m_InitialParameters[2] is x12 or x21?
> thanks and again any response would be appreciated
> christos
> 
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