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/*=========================================================================
*
* Copyright UMC Utrecht and contributors
*
* 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 itkDeformationFieldRegulizer_hxx
#define itkDeformationFieldRegulizer_hxx
#include "itkDeformationFieldRegulizer.h"
namespace itk
{
/**
* ************************ Constructor *************************
*/
template <class TAnyITKTransform>
DeformationFieldRegulizer<TAnyITKTransform>::DeformationFieldRegulizer()
{
/** Initialize. */
this->m_IntermediaryDeformationFieldTransform = nullptr;
this->m_Initialized = false;
} // end Constructor
/**
* ********* InitializeIntermediaryDeformationField **************
*/
template <class TAnyITKTransform>
void
DeformationFieldRegulizer<TAnyITKTransform>::InitializeDeformationFields()
{
/** Initialize this->m_IntermediaryDeformationFieldTransform. */
this->m_IntermediaryDeformationFieldTransform = IntermediaryDFTransformType::New();
/** Initialize this->m_IntermediaryDeformationField. */
auto intermediaryDeformationField = VectorImageType::New();
intermediaryDeformationField->SetRegions(this->m_DeformationFieldRegion);
intermediaryDeformationField->SetSpacing(this->m_DeformationFieldSpacing);
intermediaryDeformationField->SetOrigin(this->m_DeformationFieldOrigin);
try
{
intermediaryDeformationField->Allocate();
}
catch (itk::ExceptionObject & excp)
{
/** Add information to the exception and throw again. */
excp.SetLocation("DeformationFieldRegulizer - InitializeDeformationFields()");
std::string err_str = excp.GetDescription();
err_str += "\nError occurred while allocating the intermediary deformation field.\n";
excp.SetDescription(err_str);
throw;
}
/** Set everything to zero. */
IteratorType it(intermediaryDeformationField, intermediaryDeformationField->GetLargestPossibleRegion());
VectorPixelType vec;
vec.Fill(ScalarType{});
while (!it.IsAtEnd())
{
it.Set(vec);
++it;
}
/** Set the deformation field in the transform. */
this->m_IntermediaryDeformationFieldTransform->SetCoefficientVectorImage(intermediaryDeformationField);
/** Set to initialized. */
this->m_Initialized = true;
} // end InitializeDeformationFields()
/**
* *********************** TransformPoint ***********************
*/
template <class TAnyITKTransform>
auto
DeformationFieldRegulizer<TAnyITKTransform>::TransformPoint(const InputPointType & inputPoint) const -> OutputPointType
{
/** Get the outputpoint of any ITK Transform and the deformation field. */
OutputPointType oppAnyT, oppDF, opp;
oppAnyT = this->Superclass::TransformPoint(inputPoint);
oppDF = this->m_IntermediaryDeformationFieldTransform->TransformPoint(inputPoint);
/** Add them: don't forget to subtract ipp. */
for (unsigned int i = 0; i < OutputSpaceDimension; ++i)
{
opp[i] = oppAnyT[i] + oppDF[i] - inputPoint[i];
}
/** Return a value. */
return opp;
} // end TransformPoint()
/**
* ******** UpdateIntermediaryDeformationFieldTransform *********
*/
template <class TAnyITKTransform>
void
DeformationFieldRegulizer<TAnyITKTransform>::UpdateIntermediaryDeformationFieldTransform(
typename VectorImageType::Pointer vecImage)
{
/** Set the vecImage (which is allocated elsewhere) and put it in
* IntermediaryDeformationFieldTransform (where it is copied and split up).
*/
this->m_IntermediaryDeformationFieldTransform->SetCoefficientVectorImage(vecImage);
} // end UpdateIntermediaryDeformationFieldTransform()
} // end namespace itk
#endif // end #ifndef itkDeformationFieldRegulizer_hxx
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