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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://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 itkPointSetToImageMetric_hxx
#define itkPointSetToImageMetric_hxx
namespace itk
{
template <typename TFixedPointSet, typename TMovingImage>
PointSetToImageMetric<TFixedPointSet, TMovingImage>::PointSetToImageMetric()
{
m_FixedPointSet = nullptr; // has to be provided by the user.
m_MovingImage = nullptr; // has to be provided by the user.
m_Transform = nullptr; // has to be provided by the user.
m_Interpolator = nullptr; // has to be provided by the user.
m_ComputeGradient = true; // metric computes gradient by default
m_NumberOfPixelsCounted = 0; // initialize to zero
m_GradientImage = nullptr; // computed at initialization
}
template <typename TFixedPointSet, typename TMovingImage>
void
PointSetToImageMetric<TFixedPointSet, TMovingImage>::SetTransformParameters(const ParametersType & parameters) const
{
if (!m_Transform)
{
itkExceptionMacro("Transform has not been assigned");
}
m_Transform->SetParameters(parameters);
}
template <typename TFixedPointSet, typename TMovingImage>
void
PointSetToImageMetric<TFixedPointSet, TMovingImage>::Initialize()
{
if (!m_Transform)
{
itkExceptionMacro("Transform is not present");
}
if (!m_Interpolator)
{
itkExceptionMacro("Interpolator is not present");
}
if (!m_MovingImage)
{
itkExceptionMacro("MovingImage is not present");
}
if (!m_FixedPointSet)
{
itkExceptionMacro("FixedPointSet is not present");
}
// If the image is provided by a source, update the source.
m_MovingImage->UpdateSource();
// If the point set is provided by a source, update the source.
m_FixedPointSet->UpdateSource();
m_Interpolator->SetInputImage(m_MovingImage);
if (m_ComputeGradient)
{
GradientImageFilterPointer gradientFilter = GradientImageFilterType::New();
gradientFilter->SetInput(m_MovingImage);
const typename MovingImageType::SpacingType & spacing = m_MovingImage->GetSpacing();
double maximumSpacing = 0.0;
for (unsigned int i = 0; i < MovingImageDimension; ++i)
{
if (spacing[i] > maximumSpacing)
{
maximumSpacing = spacing[i];
}
}
gradientFilter->SetSigma(maximumSpacing);
gradientFilter->SetNormalizeAcrossScale(true);
gradientFilter->Update();
m_GradientImage = gradientFilter->GetOutput();
}
}
template <typename TFixedPointSet, typename TMovingImage>
void
PointSetToImageMetric<TFixedPointSet, TMovingImage>::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "NumberOfPixelsCounted: "
<< static_cast<typename NumericTraits<SizeValueType>::PrintType>(m_NumberOfPixelsCounted) << std::endl;
itkPrintSelfObjectMacro(FixedPointSet);
itkPrintSelfObjectMacro(MovingImage);
itkPrintSelfObjectMacro(Transform);
itkPrintSelfObjectMacro(Interpolator);
os << indent << "ComputeGradient: " << (m_ComputeGradient ? "On" : "Off") << std::endl;
itkPrintSelfObjectMacro(GradientImage);
}
} // end namespace itk
#endif
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