itk::simple::GeodesicActiveContourLevelSetImageFilter Class Reference

Segments structures in images based on a user supplied edge potential map. More...

#include <sitkGeodesicActiveContourLevelSetImageFilter.h>

Inheritance diagram for itk::simple::GeodesicActiveContourLevelSetImageFilter:

Collaboration diagram for itk::simple::GeodesicActiveContourLevelSetImageFilter:

Detailed Description

Segments structures in images based on a user supplied edge potential map.

IMPORTANT

The SegmentationLevelSetImageFilter class and the GeodesicActiveContourLevelSetFunction class contain additional information necessary to gain full understanding of how to use this filter.

OVERVIEW

This class is a level set method segmentation filter. An initial contour is propagated outwards (or inwards) until it ''sticks'' to the shape boundaries. This is done by using a level set speed function based on a user supplied edge potential map.

INPUTS

This filter requires two inputs. The first input is a initial level set. The initial level set is a real image which contains the initial contour/surface as the zero level set. For example, a signed distance function from the initial contour/surface is typically used. Unlike the simpler ShapeDetectionLevelSetImageFilter the initial contour does not have to lie wholly within the shape to be segmented. The initial contour is allow to overlap the shape boundary. The extra advection term in the update equation behaves like a doublet and attracts the contour to the boundary. This approach for segmentation follows that of Caselles et al (1997).

The second input is the feature image. For this filter, this is the edge potential map. General characteristics of an edge potential map is that it has values close to zero in regions near the edges and values close to one inside the shape itself. Typically, the edge potential map is compute from the image 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.

See SegmentationLevelSetImageFilter and SparseFieldLevelSetImageFilter for more information on Inputs.

PARAMETERS

The PropagationScaling parameter can be used to switch from propagation outwards (POSITIVE scaling parameter) versus propagating inwards (NEGATIVE scaling parameter).

This implementation allows the user to set the weights between the propagation, advection and curvature term using methods SetPropagationScaling() , SetAdvectionScaling() , SetCurvatureScaling() . In general, the larger the CurvatureScaling, the smoother the resulting contour. To follow the implementation in Caselles et al paper, set the PropagationScaling to \( c \) (the inflation or balloon force) and AdvectionScaling and CurvatureScaling both to 1.0.

OUTPUTS

The filter outputs a single, scalar, real-valued image. Negative values in the output image represent the inside of the segmented region and positive values in the image represent the outside of the segmented region. The zero crossings of the image correspond to the position of the propagating front.

See SparseFieldLevelSetImageFilter and SegmentationLevelSetImageFilter for more information.

REFERENCES

"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

SegmentationLevelSetImageFilter

GeodesicActiveContourLevelSetFunction

SparseFieldLevelSetImageFilter

itk::simple::GeodesicActiveContourLevelSet for the procedural interface

itk::GeodesicActiveContourLevelSetImageFilter for the Doxygen on the original ITK class.

Definition at line 93 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

Public Types
using	PixelIDTypeList = RealPixelIDTypeList
using	Self = GeodesicActiveContourLevelSetImageFilter
Public Types inherited from itk::simple::ImageFilter
using	Self = ImageFilter
Public Types inherited from itk::simple::ProcessObject
using	Self = ProcessObject

Public Member Functions
Image	Execute (const Image &initialImage, const Image &featureImage)
Image	Execute (Image &&initialImage, const Image &featureImage)
	GeodesicActiveContourLevelSetImageFilter ()
double	GetAdvectionScaling () const
double	GetCurvatureScaling () const
uint32_t	GetElapsedIterations () const
	Number of iterations run. More...
double	GetMaximumRMSError () const
std::string	GetName () const
uint32_t	GetNumberOfIterations () const
double	GetPropagationScaling () const
bool	GetReverseExpansionDirection () const
double	GetRMSChange () const
	The Root Mean Square of the levelset upon termination. More...
Self &	ReverseExpansionDirectionOff ()
Self &	ReverseExpansionDirectionOn ()
Self &	SetAdvectionScaling (double AdvectionScaling)
Self &	SetCurvatureScaling (double CurvatureScaling)
Self &	SetMaximumRMSError (double MaximumRMSError)
Self &	SetNumberOfIterations (uint32_t NumberOfIterations)
Self &	SetPropagationScaling (double PropagationScaling)
Self &	SetReverseExpansionDirection (bool ReverseExpansionDirection)
std::string	ToString () const
virtual	~GeodesicActiveContourLevelSetImageFilter ()
Public Member Functions inherited from itk::simple::ImageFilter
	ImageFilter ()
virtual	~ImageFilter ()=0
Public Member Functions inherited from itk::simple::ProcessObject
virtual void	Abort ()
virtual int	AddCommand (itk::simple::EventEnum event, const std::function< void()> &func)
	Directly add a callback to observe an event. More...
virtual int	AddCommand (itk::simple::EventEnum event, itk::simple::Command &cmd)
	Add a Command Object to observer the event. More...
virtual float	GetProgress () const
	An Active Measurement of the progress of execution. More...
virtual bool	HasCommand (itk::simple::EventEnum event) const
	Query of this object has any registered commands for event. More...
	ProcessObject ()
virtual void	RemoveAllCommands ()
	Remove all registered commands. More...
virtual	~ProcessObject ()
virtual void	DebugOn ()
virtual void	DebugOff ()
virtual bool	GetDebug () const
virtual void	SetDebug (bool debugFlag)
virtual void	SetNumberOfThreads (unsigned int n)
virtual unsigned int	GetNumberOfThreads () const
virtual void	SetNumberOfWorkUnits (unsigned int n)
virtual unsigned int	GetNumberOfWorkUnits () const

Private Types
using	MemberFunctionType = Image(Self::*)(const Image *initialImage, const Image *featureImage)

Private Member Functions
template<class TImageType >
Image	ExecuteInternal (const Image *initialImage, const Image *featureImage)

Private Attributes
double	m_AdvectionScaling {1.0}
double	m_CurvatureScaling {1.0}
uint32_t	m_ElapsedIterations {0}
bool	m_InPlace {false}
double	m_MaximumRMSError {0.01}
std::unique_ptr< detail::MemberFunctionFactory< MemberFunctionType > >	m_MemberFactory
uint32_t	m_NumberOfIterations {1000u}
double	m_PropagationScaling {1.0}
bool	m_ReverseExpansionDirection {false}
double	m_RMSChange {0.0}

Friends
struct	detail::MemberFunctionAddressor< MemberFunctionType >

Additional Inherited Members
Static Public Member Functions inherited from itk::simple::ProcessObject
static bool	GetGlobalDefaultDebug ()
static void	GlobalDefaultDebugOff ()
static void	GlobalDefaultDebugOn ()
static void	SetGlobalDefaultDebug (bool debugFlag)
static void	GlobalWarningDisplayOn ()
static void	GlobalWarningDisplayOff ()
static void	SetGlobalWarningDisplay (bool flag)
static bool	GetGlobalWarningDisplay ()
static double	GetGlobalDefaultCoordinateTolerance ()
	Access the global tolerance to determine congruent spaces. More...
static void	SetGlobalDefaultCoordinateTolerance (double)
	Access the global tolerance to determine congruent spaces. More...
static double	GetGlobalDefaultDirectionTolerance ()
	Access the global tolerance to determine congruent spaces. More...
static void	SetGlobalDefaultDirectionTolerance (double)
	Access the global tolerance to determine congruent spaces. More...
static bool	SetGlobalDefaultThreader (const std::string &threader)
	Set/Get the default threader used for process objects. More...
static std::string	GetGlobalDefaultThreader ()
	Set/Get the default threader used for process objects. More...
static void	SetGlobalDefaultNumberOfThreads (unsigned int n)
static unsigned int	GetGlobalDefaultNumberOfThreads ()
	Set/Get the default threader used for process objects. More...
Protected Member Functions inherited from itk::simple::ImageFilter
void	CheckImageMatchingDimension (const Image &image1, const Image &image2, const std::string &image2Name)
void	CheckImageMatchingPixelType (const Image &image1, const Image &image2, const std::string &image2Name)
void	CheckImageMatchingSize (const Image &image1, const Image &image2, const std::string &image2Name)
Protected Member Functions inherited from itk::simple::ProcessObject
virtual unsigned long	AddITKObserver (const itk::EventObject &, itk::Command *)
virtual itk::ProcessObject *	GetActiveProcess ()
virtual void	OnActiveProcessDelete ()
virtual void	onCommandDelete (const itk::simple::Command *cmd) noexcept
virtual void	PreUpdate (itk::ProcessObject *p)
virtual void	RemoveITKObserver (EventCommand &e)
Protected Member Functions inherited from itk::simple::NonCopyable
	NonCopyable ()=default
	NonCopyable (const NonCopyable &)=delete
NonCopyable &	operator= (const NonCopyable &)=delete
Static Protected Member Functions inherited from itk::simple::ImageFilter
template<class TImageType >
static void	FixNonZeroIndex (TImageType *img)
Static Protected Member Functions inherited from itk::simple::ProcessObject
template<class TImageType >
static TImageType::ConstPointer	CastImageToITK (const Image &img)
template<class TPixelType , unsigned int VImageDimension, unsigned int VLength, template< typename, unsigned int > class TVector>
static Image	CastITKToImage (itk::Image< TVector< TPixelType, VLength >, VImageDimension > *img)
template<unsigned int VImageDimension, unsigned int VLength, template< unsigned int > class TVector>
static Image	CastITKToImage (itk::Image< TVector< VLength >, VImageDimension > *img)
template<class TImageType >
static Image	CastITKToImage (TImageType *img)
static const itk::EventObject &	GetITKEventObject (EventEnum e)
template<typename T >
static std::ostream &	ToStringHelper (std::ostream &os, const T &v)
static std::ostream &	ToStringHelper (std::ostream &os, const char &v)
static std::ostream &	ToStringHelper (std::ostream &os, const signed char &v)
static std::ostream &	ToStringHelper (std::ostream &os, const unsigned char &v)

Member Typedef Documentation

MemberFunctionType

using itk::simple::GeodesicActiveContourLevelSetImageFilter::MemberFunctionType = Image (Self::*)( const Image * initialImage, const Image * featureImage )

private

Setup for member function dispatching

Definition at line 193 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

PixelIDTypeList

using itk::simple::GeodesicActiveContourLevelSetImageFilter::PixelIDTypeList = RealPixelIDTypeList

Define the pixels types supported by this filter

Definition at line 105 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

Self

using itk::simple::GeodesicActiveContourLevelSetImageFilter::Self = GeodesicActiveContourLevelSetImageFilter

Definition at line 95 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

Constructor & Destructor Documentation

~GeodesicActiveContourLevelSetImageFilter()

virtual itk::simple::GeodesicActiveContourLevelSetImageFilter::~GeodesicActiveContourLevelSetImageFilter ( )

virtual

Destructor

GeodesicActiveContourLevelSetImageFilter()

itk::simple::GeodesicActiveContourLevelSetImageFilter::GeodesicActiveContourLevelSetImageFilter

(

)

Default Constructor that takes no arguments and initializes default parameters

Member Function Documentation

Execute() [1/2]

Image itk::simple::GeodesicActiveContourLevelSetImageFilter::Execute	(	const Image &	initialImage,
		const Image &	featureImage
	)

Execute() [2/2]

Image itk::simple::GeodesicActiveContourLevelSetImageFilter::Execute	(	Image &&	initialImage,
		const Image &	featureImage
	)

Execute the filter on the input image

ExecuteInternal()

template<class TImageType >

Image itk::simple::GeodesicActiveContourLevelSetImageFilter::ExecuteInternal ( const Image *  initialImage, const Image *  featureImage  )

private

GetAdvectionScaling()

double itk::simple::GeodesicActiveContourLevelSetImageFilter::GetAdvectionScaling ( ) const

inline

Definition at line 138 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

GetCurvatureScaling()

double itk::simple::GeodesicActiveContourLevelSetImageFilter::GetCurvatureScaling ( ) const

inline

Definition at line 130 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

GetElapsedIterations()

uint32_t itk::simple::GeodesicActiveContourLevelSetImageFilter::GetElapsedIterations ( ) const

inline

Number of iterations run.

This is a measurement. Its value is updated in the Execute methods, so the value will only be valid after an execution.

Definition at line 165 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

GetMaximumRMSError()

double itk::simple::GeodesicActiveContourLevelSetImageFilter::GetMaximumRMSError ( ) const

inline

Definition at line 114 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

GetName()

std::string itk::simple::GeodesicActiveContourLevelSetImageFilter::GetName ( ) const

inlinevirtual

Name of this class

Implements itk::simple::ProcessObject.

Definition at line 177 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

GetNumberOfIterations()

uint32_t itk::simple::GeodesicActiveContourLevelSetImageFilter::GetNumberOfIterations ( ) const

inline

Definition at line 146 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

GetPropagationScaling()

double itk::simple::GeodesicActiveContourLevelSetImageFilter::GetPropagationScaling ( ) const

inline

Definition at line 122 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

GetReverseExpansionDirection()

bool itk::simple::GeodesicActiveContourLevelSetImageFilter::GetReverseExpansionDirection ( ) const

inline

Definition at line 158 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

GetRMSChange()

double itk::simple::GeodesicActiveContourLevelSetImageFilter::GetRMSChange ( ) const

inline

The Root Mean Square of the levelset upon termination.

This is a measurement. Its value is updated in the Execute methods, so the value will only be valid after an execution.

Definition at line 173 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

ReverseExpansionDirectionOff()

Self& itk::simple::GeodesicActiveContourLevelSetImageFilter::ReverseExpansionDirectionOff ( )

inline

Definition at line 154 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

ReverseExpansionDirectionOn()

Self& itk::simple::GeodesicActiveContourLevelSetImageFilter::ReverseExpansionDirectionOn ( )

inline

Set the value of ReverseExpansionDirection to true or false respectfully.

Definition at line 153 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

SetAdvectionScaling()

Self& itk::simple::GeodesicActiveContourLevelSetImageFilter::SetAdvectionScaling ( double  AdvectionScaling )

inline

Definition at line 134 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

SetCurvatureScaling()

Self& itk::simple::GeodesicActiveContourLevelSetImageFilter::SetCurvatureScaling ( double  CurvatureScaling )

inline

Definition at line 126 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

SetMaximumRMSError()

Self& itk::simple::GeodesicActiveContourLevelSetImageFilter::SetMaximumRMSError ( double  MaximumRMSError )

inline

Definition at line 110 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

SetNumberOfIterations()

Self& itk::simple::GeodesicActiveContourLevelSetImageFilter::SetNumberOfIterations ( uint32_t  NumberOfIterations )

inline

Definition at line 142 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

SetPropagationScaling()

Self& itk::simple::GeodesicActiveContourLevelSetImageFilter::SetPropagationScaling ( double  PropagationScaling )

inline

Definition at line 118 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

SetReverseExpansionDirection()

Self& itk::simple::GeodesicActiveContourLevelSetImageFilter::SetReverseExpansionDirection ( bool  ReverseExpansionDirection )

inline

Definition at line 150 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

ToString()

std::string itk::simple::GeodesicActiveContourLevelSetImageFilter::ToString ( ) const

virtual

Print ourselves out

Reimplemented from itk::simple::ProcessObject.

Friends And Related Function Documentation

detail::MemberFunctionAddressor< MemberFunctionType >

friend struct detail::MemberFunctionAddressor< MemberFunctionType >

friend

Definition at line 197 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

Member Data Documentation

m_AdvectionScaling

double itk::simple::GeodesicActiveContourLevelSetImageFilter::m_AdvectionScaling {1.0}

private

Definition at line 212 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

m_CurvatureScaling

double itk::simple::GeodesicActiveContourLevelSetImageFilter::m_CurvatureScaling {1.0}

private

Definition at line 209 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

m_ElapsedIterations

uint32_t itk::simple::GeodesicActiveContourLevelSetImageFilter::m_ElapsedIterations {0}

private

Definition at line 221 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

m_InPlace

bool itk::simple::GeodesicActiveContourLevelSetImageFilter::m_InPlace {false}

private

Definition at line 226 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

m_MaximumRMSError

double itk::simple::GeodesicActiveContourLevelSetImageFilter::m_MaximumRMSError {0.01}

private

Definition at line 203 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

m_MemberFactory

std::unique_ptr<detail::MemberFunctionFactory<MemberFunctionType> > itk::simple::GeodesicActiveContourLevelSetImageFilter::m_MemberFactory

private

Definition at line 199 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

m_NumberOfIterations

uint32_t itk::simple::GeodesicActiveContourLevelSetImageFilter::m_NumberOfIterations {1000u}

private

Definition at line 215 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

m_PropagationScaling

double itk::simple::GeodesicActiveContourLevelSetImageFilter::m_PropagationScaling {1.0}

private

Definition at line 206 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

m_ReverseExpansionDirection

bool itk::simple::GeodesicActiveContourLevelSetImageFilter::m_ReverseExpansionDirection {false}

private

Definition at line 218 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

m_RMSChange

double itk::simple::GeodesicActiveContourLevelSetImageFilter::m_RMSChange {0.0}

private

Definition at line 223 of file sitkGeodesicActiveContourLevelSetImageFilter.h.

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The documentation for this class was generated from the following file:

• sitkGeodesicActiveContourLevelSetImageFilter.h