#include <itkThresholdSegmentationLevelSetFunction.h>

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

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

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.$

See Also: SegmentationLevelSetImageFunction; ThresholdSegmentationLevelSetImageFilter

Definition at line 56 of file itkThresholdSegmentationLevelSetFunction.h.

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 SmartPointer< const Self >	ConstPointer

typedef InterpolatorType::ContinuousIndexType	ContinuousIndexType

typedef TFeatureImageType	FeatureImageType

typedef FeatureImageType::PixelType	FeatureScalarType

typedef Superclass::FloatOffsetType	FloatOffsetType

typedef Superclass::GlobalDataStruct	GlobalDataStruct

typedef Superclass::ImageType	ImageType

typedef ImageType::IndexType	IndexType

typedef LinearInterpolateImageFunction < ImageType >	InterpolatorType

typedef Superclass::NeighborhoodType	NeighborhoodType

typedef Superclass::PixelRealType	PixelRealType

typedef SmartPointer< Self >	Pointer

typedef Superclass::RadiusType	RadiusType

typedef Superclass::ScalarValueType	ScalarValueType

typedef SegmentationLevelSetFunction	Self

typedef LevelSetFunction < TImageType >	Superclass

typedef Image< VectorType, itkGetStaticConstMacro(ImageDimension) >	VectorImageType

typedef VectorLinearInterpolateImageFunction < VectorImageType >	VectorInterpolatorType

typedef Superclass::VectorType	VectorType

Public Types inherited from itk::LevelSetFunction< TImageType >
typedef SmartPointer< const Self >	ConstPointer

typedef Superclass::FloatOffsetType	FloatOffsetType

typedef Superclass::ImageType	ImageType

typedef Superclass::NeighborhoodScalesType	NeighborhoodScalesType

typedef Superclass::NeighborhoodType	NeighborhoodType

typedef Superclass::PixelRealType	PixelRealType

typedef Superclass::PixelType	PixelType

typedef SmartPointer< Self >	Pointer

typedef Superclass::RadiusType	RadiusType

typedef PixelType	ScalarValueType

typedef LevelSetFunction	Self

typedef FiniteDifferenceFunction < TImageType >	Superclass

typedef double	TimeStepType

typedef FixedArray < ScalarValueType, itkGetStaticConstMacro(ImageDimension) >	VectorType

Public Types inherited from itk::FiniteDifferenceFunction< TImageType >
typedef SmartPointer< const Self >	ConstPointer

typedef ZeroFluxNeumannBoundaryCondition < ImageType >	DefaultBoundaryConditionType

typedef Vector< float, itkGetStaticConstMacro(ImageDimension) >	FloatOffsetType

typedef TImageType	ImageType

typedef Vector< PixelRealType, itkGetStaticConstMacro(ImageDimension) >	NeighborhoodScalesType

typedef ConstNeighborhoodIterator < TImageType, DefaultBoundaryConditionType >	NeighborhoodType

typedef double	PixelRealType

typedef ImageType::PixelType	PixelType

typedef SmartPointer< Self >	Pointer

typedef ConstNeighborhoodIterator < TImageType >::RadiusType	RadiusType

typedef FiniteDifferenceFunction	Self

typedef LightObject	Superclass

typedef double	TimeStepType

Public Types inherited from itk::LightObject
typedef SmartPointer< const Self >	ConstPointer

typedef SmartPointer< Self >	Pointer

typedef LightObject	Self

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

void	GetScaleCoefficients (PixelRealType vals[ImageDimension]) 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 const unsigned int	ImageDimension = Superclass::ImageDimension

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

Static Public Attributes inherited from itk::FiniteDifferenceFunction< TImageType >
static const unsigned int	ImageDimension = ImageType::ImageDimension

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_LaplacianSmoothingWeight

ScalarValueType	m_PropagationWeight

bool	m_UseMinimalCurvature

OffsetValueType	m_xStride [itkGetStaticConstMacro(ImageDimension)]

std::slice	x_slice [itkGetStaticConstMacro(ImageDimension)]

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

Additional Inherited Members
Protected Types inherited from itk::LightObject
typedef int	InternalReferenceCountType

Static Protected Member Functions inherited from itk::LevelSetFunction< TImageType >
static VectorType	InitializeZeroVectorConstant ()

Static Protected Attributes inherited from itk::LevelSetFunction< TImageType >
static double	m_DT

static double	m_WaveDT

static VectorType	m_ZeroVectorConstant