#include <itkThresholdSegmentationLevelSetFunction.h>

Inheritance diagram for itk::ThresholdSegmentationLevelSetFunction< TImageType, TFeatureImageType >:

Collaboration diagram for itk::ThresholdSegmentationLevelSetFunction< TImageType, TFeatureImageType >:

Public Types
typedef SmartPointer< const Self >	ConstPointer
typedef TFeatureImageType	FeatureImageType
typedef Superclass::FeatureScalarType	FeatureScalarType
typedef Superclass::ImageType	ImageType
typedef SmartPointer< Self >	Pointer
typedef Superclass::RadiusType	RadiusType
typedef Superclass::ScalarValueType	ScalarValueType
typedef ThresholdSegmentationLevelSetFunction	Self
typedef SegmentationLevelSetFunction < TImageType, TFeatureImageType >	Superclass
Public Types inherited from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >
typedef InterpolatorType::ContinuousIndexType	ContinuousIndexType
typedef Superclass::FloatOffsetType	FloatOffsetType
typedef Superclass::GlobalDataStruct	GlobalDataStruct
typedef ImageType::IndexType	IndexType
typedef LinearInterpolateImageFunction < ImageType >	InterpolatorType
typedef Superclass::NeighborhoodType	NeighborhoodType
typedef Superclass::PixelRealType	PixelRealType
typedef Image< VectorType, itkGetStaticConstMacro(ImageDimension) >	VectorImageType
typedef VectorLinearInterpolateImageFunction < VectorImageType >	VectorInterpolatorType
typedef Superclass::VectorType	VectorType
Public Types inherited from itk::LevelSetFunction< TImageType >
typedef Superclass::NeighborhoodScalesType	NeighborhoodScalesType
typedef Superclass::PixelType	PixelType
typedef double	TimeStepType
Public Types inherited from itk::FiniteDifferenceFunction< TImageType >
typedef ZeroFluxNeumannBoundaryCondition < ImageType >	DefaultBoundaryConditionType
Public Types inherited from itk::LightObject

Public Member Functions
virtual void	CalculateSpeedImage ()
virtual ::itk::LightObject::Pointer	CreateAnother (void) const
ScalarValueType	GetEdgeWeight () const
virtual const char *	GetNameOfClass () const
ScalarValueType	GetSmoothingConductance () const
int	GetSmoothingIterations () const
ScalarValueType	GetSmoothingTimeStep () const
virtual void	Initialize (const RadiusType &r)
void	SetEdgeWeight (const ScalarValueType p)
void	SetSmoothingConductance (const ScalarValueType p)
void	SetSmoothingIterations (const int p)
void	SetSmoothingTimeStep (const ScalarValueType i)

void	SetUpperThreshold (FeatureScalarType f)
FeatureScalarType	GetUpperThreshold () const
void	SetLowerThreshold (FeatureScalarType f)
FeatureScalarType	GetLowerThreshold () const
Public Member Functions inherited from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >
virtual void	AllocateAdvectionImage ()
virtual void	AllocateSpeedImage ()
virtual void	CalculateAdvectionImage ()
virtual void	ReverseExpansionDirection ()
virtual const FeatureImageType *	GetFeatureImage () const
virtual void	SetFeatureImage (const FeatureImageType *f)
virtual ImageType *	GetSpeedImage ()
void	SetSpeedImage (ImageType *s)
virtual VectorImageType *	GetAdvectionImage () const
void	SetAdvectionImage (VectorImageType *s)
Public Member Functions inherited from itk::LevelSetFunction< TImageType >
virtual ScalarValueType	Compute3DMinimalCurvature (const NeighborhoodType &, const FloatOffsetType &, GlobalDataStruct *gd=0)
virtual ScalarValueType	ComputeCurvatureTerm (const NeighborhoodType &, const FloatOffsetType &, GlobalDataStruct *gd=0)
virtual TimeStepType	ComputeGlobalTimeStep (void *GlobalData) const
virtual ScalarValueType	ComputeMeanCurvature (const NeighborhoodType &, const FloatOffsetType &, GlobalDataStruct *gd=0)
virtual ScalarValueType	ComputeMinimalCurvature (const NeighborhoodType &, const FloatOffsetType &, GlobalDataStruct *gd=0)
virtual PixelType	ComputeUpdate (const NeighborhoodType &neighborhood, void *globalData, const FloatOffsetType &=FloatOffsetType(0.0))
virtual ScalarValueType	CurvatureSpeed (const NeighborhoodType &, const FloatOffsetType &, GlobalDataStruct *=0) const
virtual void *	GetGlobalDataPointer () const
bool	GetUseMinimalCurvature () const
virtual ScalarValueType	LaplacianSmoothingSpeed (const NeighborhoodType &, const FloatOffsetType &, GlobalDataStruct *=0) const
virtual void	ReleaseGlobalDataPointer (void *GlobalData) const
void	SetUseMinimalCurvature (bool b)
void	UseMinimalCurvatureOff ()
void	UseMinimalCurvatureOn ()
virtual void	SetAdvectionWeight (const ScalarValueType a)
ScalarValueType	GetAdvectionWeight () const
virtual void	SetPropagationWeight (const ScalarValueType p)
ScalarValueType	GetPropagationWeight () const
virtual void	SetCurvatureWeight (const ScalarValueType c)
ScalarValueType	GetCurvatureWeight () const
void	SetLaplacianSmoothingWeight (const ScalarValueType c)
ScalarValueType	GetLaplacianSmoothingWeight () const
void	SetEpsilonMagnitude (const ScalarValueType e)
ScalarValueType	GetEpsilonMagnitude () const
Public Member Functions inherited from itk::FiniteDifferenceFunction< TImageType >
const NeighborhoodScalesType	ComputeNeighborhoodScales () const
const RadiusType &	GetRadius () const
virtual void	InitializeIteration ()
void	SetRadius (const RadiusType &r)
void	SetScaleCoefficients (PixelRealType vals[ImageDimension])
Public Member Functions inherited from itk::LightObject
virtual void	Delete ()
virtual int	GetReferenceCount () const
	itkCloneMacro (Self)
void	Print (std::ostream &os, Indent indent=0) const
virtual void	Register () const
virtual void	SetReferenceCount (int)
virtual void	UnRegister () const

Static Public Member Functions
static Pointer	New ()

Static Public Attributes
static const unsigned int	ImageDimension = Superclass::ImageDimension
Static Public Attributes inherited from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >
Static Public Attributes inherited from itk::LevelSetFunction< TImageType >
Static Public Attributes inherited from itk::FiniteDifferenceFunction< TImageType >

Protected Member Functions
void	operator= (const Self &)
void	PrintSelf (std::ostream &os, Indent indent) const
	ThresholdSegmentationLevelSetFunction ()
	ThresholdSegmentationLevelSetFunction (const Self &)
virtual	~ThresholdSegmentationLevelSetFunction ()
Protected Member Functions inherited from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >
virtual VectorType	AdvectionField (const NeighborhoodType &, const FloatOffsetType &, GlobalDataStruct *gd) const
virtual ScalarValueType	PropagationSpeed (const NeighborhoodType &, const FloatOffsetType &, GlobalDataStruct *gd) const
	SegmentationLevelSetFunction ()
virtual	~SegmentationLevelSetFunction ()
Protected Member Functions inherited from itk::LevelSetFunction< TImageType >
	LevelSetFunction ()
virtual	~LevelSetFunction ()
Protected Member Functions inherited from itk::FiniteDifferenceFunction< TImageType >
	FiniteDifferenceFunction ()
	~FiniteDifferenceFunction ()
Protected Member Functions inherited from itk::LightObject
virtual LightObject::Pointer	InternalClone () const
	LightObject ()
virtual void	PrintHeader (std::ostream &os, Indent indent) const
virtual void	PrintTrailer (std::ostream &os, Indent indent) const
virtual	~LightObject ()

Protected Attributes
ScalarValueType	m_EdgeWeight
FeatureScalarType	m_LowerThreshold
ScalarValueType	m_SmoothingConductance
int	m_SmoothingIterations
ScalarValueType	m_SmoothingTimeStep
FeatureScalarType	m_UpperThreshold
Protected Attributes inherited from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >
VectorImageType::Pointer	m_AdvectionImage
FeatureImageType::ConstPointer	m_FeatureImage
InterpolatorType::Pointer	m_Interpolator
ImageType::Pointer	m_SpeedImage
Functor::VectorCast< typename VectorInterpolatorType::OutputType, VectorType >	m_VectorCast
VectorInterpolatorType::Pointer	m_VectorInterpolator
Protected Attributes inherited from itk::LevelSetFunction< TImageType >
ScalarValueType	m_AdvectionWeight
OffsetValueType	m_Center
ScalarValueType	m_CurvatureWeight
ScalarValueType	m_EpsilonMagnitude
ScalarValueType	m_PropagationWeight
bool	m_UseMinimalCurvature
OffsetValueType	m_xStride [itkGetStaticConstMacro(ImageDimension)]
std::slice	x_slice [itkGetStaticConstMacro(ImageDimension)]
ScalarValueType	m_LaplacianSmoothingWeight
Protected Attributes inherited from itk::FiniteDifferenceFunction< TImageType >
RadiusType	m_Radius
PixelRealType	m_ScaleCoefficients [ImageDimension]
Protected Attributes inherited from itk::LightObject
InternalReferenceCountType	m_ReferenceCount
SimpleFastMutexLock	m_ReferenceCountLock

Detailed Description

template<class TImageType, class TFeatureImageType = TImageType>
class itk::ThresholdSegmentationLevelSetFunction< TImageType, TFeatureImageType >

This function is used in ThresholdSegmentationLevelSetImageFilter to segment structures in images based on intensity values.

SegmentationLevelSetFunction is a subclass of the generic LevelSetFunction.: It is useful for segmentations based on intensity values in an image. It works by constructing a speed term (feature image) with positive values inside an intensity window (between a low and high threshold) and negative values outside that intensity window. The evolving level set front will lock onto regions that are at the edges of the intensity window.

You may optionally add a Laplacian calculation on the image to the threshold-based speed term by setting the EdgeWeight parameter to a non-zero value. The Laplacian term will cause the evolving surface to be more strongly attracted to image edges. Several parameters control a preprocessing FeatureImage smoothing stage applied only to the Laplacian calculation.

: Image is thresholded pixel by pixel using upper threshold and lower threshold according to the following formula.

: $f(x) = \left\{ \begin{array}{ll} g(x) - L & \mbox{if $(g)x < (U-L)/2 + L$} \\ U - g(x) & \mbox{otherwise} \end{array} \right.$