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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.
*
*=========================================================================*/
/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkThinPlateR2LogRSplineKernelTransform2.txx,v $
Date: $Date: 2006/03/19 04:36:59 $
Version: $Revision: 1.8 $
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 _itkThinPlateR2LogRSplineKernelTransform2_hxx
#define _itkThinPlateR2LogRSplineKernelTransform2_hxx
#include "itkThinPlateR2LogRSplineKernelTransform2.h"
namespace itk
{
template <class TScalarType, unsigned int NDimensions>
void
ThinPlateR2LogRSplineKernelTransform2<TScalarType, NDimensions>::ComputeG(const InputVectorType & x,
GMatrixType & GMatrix) const
{
const TScalarType r = x.GetNorm();
GMatrix.fill(TScalarType{});
const TScalarType R2logR = (r > 1e-8) ? r * r * std::log(r) : TScalarType{};
GMatrix.fill_diagonal(R2logR);
}
template <class TScalarType, unsigned int NDimensions>
void
ThinPlateR2LogRSplineKernelTransform2<TScalarType, NDimensions>::ComputeDeformationContribution(
const InputPointType & thisPoint,
OutputPointType & result) const
{
const unsigned long numberOfLandmarks = this->m_SourceLandmarks->GetNumberOfPoints();
PointsIterator sp = this->m_SourceLandmarks->GetPoints()->Begin();
for (unsigned int lnd = 0; lnd < numberOfLandmarks; ++lnd)
{
InputVectorType position = thisPoint - sp->Value();
const TScalarType r = position.GetNorm();
const TScalarType R2logR = (r > 1e-8) ? r * r * std::log(r) : TScalarType{};
for (unsigned int odim = 0; odim < NDimensions; ++odim)
{
result[odim] += R2logR * this->m_DMatrix(odim, lnd);
}
++sp;
}
}
} // namespace itk
#endif
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