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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkLaplacianSegmentationLevelSetFunction.h
Language: C++
Date: $Date$
Version: $Revision$
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 __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
*/
template <class TImageType, class TFeatureImageType = TImageType>
class ITK_EXPORT 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();
virtual void Initialize(const RadiusType &r)
{
Superclass::Initialize(r);
this->SetAdvectionWeight( NumericTraits<ScalarValueType>::Zero);
this->SetPropagationWeight(-1.0 * NumericTraits<ScalarValueType>::One);
this->SetCurvatureWeight(NumericTraits<ScalarValueType>::One);
}
/**
* 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)
{
if (value == NumericTraits<ScalarValueType>::Zero)
{
Superclass::SetAdvectionWeight(value);
}
}
protected:
LaplacianSegmentationLevelSetFunction()
{
this->SetAdvectionWeight(0.0);
this->SetPropagationWeight(1.0);
this->SetCurvatureWeight(1.0);
}
virtual ~LaplacianSegmentationLevelSetFunction() {}
LaplacianSegmentationLevelSetFunction(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkLaplacianSegmentationLevelSetFunction.txx"
#endif
#endif
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