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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 itkLaplacianSegmentationLevelSetFunction_hxx
#define itkLaplacianSegmentationLevelSetFunction_hxx
#include "itkLaplacianImageFilter.h"
#include "itkCastImageFilter.h"
namespace itk
{
template <typename TImageType, typename TFeatureImageType>
void
LaplacianSegmentationLevelSetFunction<TImageType, TFeatureImageType>::CalculateSpeedImage()
{
typename LaplacianImageFilter<ImageType, ImageType>::Pointer filter =
LaplacianImageFilter<ImageType, ImageType>::New();
typename CastImageFilter<FeatureImageType, ImageType>::Pointer caster =
CastImageFilter<FeatureImageType, ImageType>::New();
caster->SetInput(this->GetFeatureImage());
filter->SetInput(caster->GetOutput());
// make the laplacian filter use the pixel container from the speed image
filter->GraftOutput(this->GetSpeedImage());
filter->Update();
// move the meta information (mostly the spacing and origin) back to
// the speed image.
//
// unfortunately functions are not filters so we can't graft back
this->GetSpeedImage()->Graft(filter->GetOutput());
}
} // end namespace itk
#endif
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