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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 itkLaplacianSegmentationLevelSetFunction_h
#define itkLaplacianSegmentationLevelSetFunction_h
#include "itkSegmentationLevelSetFunction.h"
namespace itk
{
/** \class LaplacianSegmentationLevelSetFunction
*
* \brief This function is used in LaplacianSegmentationImageFilter to
* segment structures in an image based Laplacian edges.
*
* Assumes a strictly POSITIVE feature image
* \ingroup ITKLevelSets
*/
template< typename TImageType, typename TFeatureImageType = TImageType >
class LaplacianSegmentationLevelSetFunction:
public SegmentationLevelSetFunction< TImageType, TFeatureImageType >
{
public:
/** Standard class typedefs. */
typedef LaplacianSegmentationLevelSetFunction Self;
typedef SegmentationLevelSetFunction< TImageType, TFeatureImageType >
Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
typedef TFeatureImageType FeatureImageType;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods) */
itkTypeMacro(LaplacianSegmentationLevelSetFunction, SegmentationLevelSetFunction);
/** Extract some parameters from the superclass. */
typedef typename Superclass::ImageType ImageType;
typedef typename Superclass::ScalarValueType ScalarValueType;
typedef typename Superclass::FeatureScalarType FeatureScalarType;
typedef typename Superclass::RadiusType RadiusType;
/** Extract some parameters from the superclass. */
itkStaticConstMacro(ImageDimension, unsigned int,
Superclass::ImageDimension);
virtual void CalculateSpeedImage() ITK_OVERRIDE;
virtual void Initialize(const RadiusType & r) ITK_OVERRIDE
{
Superclass::Initialize(r);
this->SetAdvectionWeight(NumericTraits< ScalarValueType >::ZeroValue());
this->SetPropagationWeight(-1.0 * NumericTraits< ScalarValueType >::OneValue());
this->SetCurvatureWeight(NumericTraits< ScalarValueType >::OneValue());
}
/**
* The Laplacian level set does not use an advection term. We clamp
* the value to ZERO here because a superclass may try to set it
* otherwise. in fact, SegmentationLevelSetImageFilter tries to set
* it when SetFeatureScaling is called.
*/
void SetAdvectionWeight(const ScalarValueType value) ITK_OVERRIDE
{
if ( Math::ExactlyEquals(value, NumericTraits< ScalarValueType >::ZeroValue()) )
{
Superclass::SetAdvectionWeight(value);
}
}
protected:
LaplacianSegmentationLevelSetFunction()
{
this->SetAdvectionWeight(0.0);
this->SetPropagationWeight(1.0);
this->SetCurvatureWeight(1.0);
}
virtual ~LaplacianSegmentationLevelSetFunction() {}
LaplacianSegmentationLevelSetFunction(const Self &) ITK_DELETE_FUNCTION;
void operator=(const Self &) ITK_DELETE_FUNCTION;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkLaplacianSegmentationLevelSetFunction.hxx"
#include "itkMath.h"
#endif
#endif
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