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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkCenteredVersorTransformInitializer.txx
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkCenteredVersorTransformInitializer_txx
#define __itkCenteredVersorTransformInitializer_txx
#include "itkCenteredVersorTransformInitializer.h"
namespace itk
{
template < class TFixedImage, class TMovingImage >
CenteredVersorTransformInitializer<TFixedImage, TMovingImage >
::CenteredVersorTransformInitializer()
{
// Force to use Moments computation since we need here the second
// order moments in order to estimate a rotation
this->Superclass::MomentsOn();
this->m_ComputeRotation = false;
}
template < class TFixedImage, class TMovingImage >
void
CenteredVersorTransformInitializer<TFixedImage, TMovingImage >
::InitializeTransform()
{
// Compute moments and initialize center of rotaion and translation
this->Superclass::InitializeTransform();
if( this->m_ComputeRotation )
{
typedef typename Superclass::FixedImageCalculatorType::MatrixType FixedMatrixType;
typedef typename Superclass::MovingImageCalculatorType::MatrixType MovingMatrixType;
FixedMatrixType fixedPrincipalAxis = this->GetFixedCalculator()->GetPrincipalAxes();
MovingMatrixType movingPrincipalAxis = this->GetMovingCalculator()->GetPrincipalAxes();
MovingMatrixType rotationMatrix = movingPrincipalAxis * fixedPrincipalAxis.GetInverse();
this->GetTransform()->SetMatrix( rotationMatrix );
}
}
template < class TFixedImage, class TMovingImage >
void
CenteredVersorTransformInitializer<TFixedImage, TMovingImage >
::PrintSelf(std::ostream& os, Indent indent) const
{
this->Superclass::PrintSelf(os,indent);
os << indent << "Compute Rotation " << this->m_ComputeRotation << std::endl;
}
} // namespace itk
#endif /* __itkCenteredVersorTransformInitializer_txx */
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