#include <itkGeodesicActiveContourLevelSetFunction.h>

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

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

Public Types
typedef SmartPointer< const Self >	ConstPointer
typedef TFeatureImageType	FeatureImageType
typedef Superclass::FeatureScalarType	FeatureScalarType
typedef Superclass::FloatOffsetType	FloatOffsetType
typedef Superclass::GlobalDataStruct	GlobalDataStruct
typedef Superclass::ImageType	ImageType
typedef Superclass::NeighborhoodType	NeighborhoodType
typedef SmartPointer< Self >	Pointer
typedef Superclass::RadiusType	RadiusType
typedef Superclass::ScalarValueType	ScalarValueType
typedef GeodesicActiveContourLevelSetFunction	Self
typedef SegmentationLevelSetFunction < TImageType, TFeatureImageType >	Superclass
typedef Superclass::VectorImageType	VectorImageType
Public Types inherited from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >
typedef InterpolatorType::ContinuousIndexType	ContinuousIndexType
typedef ImageType::IndexType	IndexType
typedef LinearInterpolateImageFunction < ImageType >	InterpolatorType
typedef Superclass::PixelRealType	PixelRealType
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	CalculateAdvectionImage ()
virtual void	CalculateSpeedImage ()
virtual ::itk::LightObject::Pointer	CreateAnother (void) const
virtual ScalarValueType	CurvatureSpeed (const NeighborhoodType &neighborhood, const FloatOffsetType &offset, GlobalDataStruct *gd) const
virtual const char *	GetNameOfClass () const
virtual void	Initialize (const RadiusType &r)

void	SetDerivativeSigma (const double v)
double	GetDerivativeSigma ()
Public Member Functions inherited from itk::SegmentationLevelSetFunction< TImageType, TFeatureImageType >
virtual void	AllocateAdvectionImage ()
virtual void	AllocateSpeedImage ()
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 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
	GeodesicActiveContourLevelSetFunction ()
	GeodesicActiveContourLevelSetFunction (const Self &)
void	operator= (const Self &)
void	PrintSelf (std::ostream &os, Indent indent) const
virtual	~GeodesicActiveContourLevelSetFunction ()
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 ()

Private Attributes
double	m_DerivativeSigma

Additional Inherited Members
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::GeodesicActiveContourLevelSetFunction< TImageType, TFeatureImageType >

This function is used in GeodesicActiveContourLevelSetImageFilter to segment structures in an image based on a user supplied edge potential map.

IMPORTANT: The LevelSetFunction class contain additional information necessary to gain full understanding of how to use this function.

GeodesicActiveContourLevelSetFunction is a subclass of the generic LevelSetFunction. It is used to segment structures in an image based on a user supplied edge potential map $ g(I) $ , which has values close to zero in regions near edges (or high image gradient) and values close to one in regions with relatively constant intensity. Typically, the edge potential map is a function of the gradient, for example:

$g(I) = 1 / ( 1 + | (\nabla * G)(I)| )$

$g(I) = \exp^{-|(\nabla * G)(I)|}$

where $ I $ is image intensity and $(\nabla * G)$ is the derivative of Gaussian operator.

The edge potential image is set via the SetFeatureImage() method.

In this function both the propagation term $P(\mathbf{x})$ and the curvature spatial modifier term $Z(\mathbf{x})$ are taken directly from the edge potential image such that:

$P(\mathbf{x}) = g(\mathbf{x})$

$Z(\mathbf{x}) = g(\mathbf{x})$

An advection term $\mathbf{A}(\mathbf{x})$ is constructed from the negative gradient of the edge potential image.

$\mathbf{A}(\mathbf{x}) = -\nabla g(\mathbf{x})$

This term behaves like a doublet attracting the contour to the edges.

This implementation is based on: "Geodesic Active Contours", V. Caselles, R. Kimmel and G. Sapiro. International Journal on Computer Vision, Vol 22, No. 1, pp 61-97, 1997

See also:: LevelSetFunction; SegmentationLevelSetImageFunction; GeodesicActiveContourLevelSetImageFilter

Definition at line 77 of file itkGeodesicActiveContourLevelSetFunction.h.