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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkCenteredVersorTransformInitializer_hxx
#define itkCenteredVersorTransformInitializer_hxx
#include "itkCenteredVersorTransformInitializer.h"
namespace itk
{
template< typename TFixedImage, typename 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< typename TFixedImage, typename 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->GetModifiableTransform()->SetMatrix(rotationMatrix);
}
}
template< typename TFixedImage, typename 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_hxx */
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