itk::simple::LaplacianSegmentationLevelSetImageFilter Class Reference

Segments structures in images based on a second derivative image features. More...

#include <sitkLaplacianSegmentationLevelSetImageFilter.h>

Inheritance diagram for itk::simple::LaplacianSegmentationLevelSetImageFilter:

Collaboration diagram for itk::simple::LaplacianSegmentationLevelSetImageFilter:

Detailed Description

Segments structures in images based on a second derivative image features.

IMPORTANT

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

OVERVIEW

This class is a level set method segmentation filter. It constructs a speed function which is zero at image edges as detected by a Laplacian filter. The evolving level set front will therefore tend to lock onto zero crossings in the image. The level set front moves fastest near edges.

The Laplacian segmentation filter is intended primarily as a tool for refining existing segmentations. The initial isosurface (as given in the seed input image) should ideally be very close to the segmentation boundary of interest. The idea is that a rough segmentation can be refined by allowing the isosurface to deform slightly to achieve a better fit to the edge features of an image. One example of such an application is to refine the output of a hand segmented image.

Because values in the Laplacian feature image will tend to be low except near edge features, this filter is not effective for segmenting large image regions from small seed surfaces.

INPUTS

This filter requires two inputs. The first input is a seed image. This seed image must contain an isosurface that you want to use as the seed for your segmentation. It can be a binary, graylevel, or floating point image. The only requirement is that it contain a closed isosurface that you will identify as the seed by setting the IsosurfaceValue parameter of the filter. For a binary image you will want to set your isosurface value halfway between your on and off values (i.e. for 0's and 1's, use an isosurface value of 0.5).

The second input is the feature image. This is the image from which the speed function will be calculated. For most applications, this is the image that you want to segment. The desired isosurface in your seed image should lie within the region of your feature image that you are trying to segment.

Note that this filter does no preprocessing of the feature image before thresholding. Because second derivative calculations are highly sensitive to noise, isotropic or anisotropic smoothing of the feature image can dramatically improve the results.

See SegmentationLevelSetImageFilter for more information on Inputs.

OUTPUTS

The filter outputs a single, scalar, real-valued image. Positive *values in the output image are inside the segmented region and negative *values in the image are outside of the inside region. The zero crossings of *the image correspond to the position of the level set front.

See SparseFieldLevelSetImageFilter and SegmentationLevelSetImageFilter for more information.

PARAMETERS

This filter has no parameters other than those described in SegmentationLevelSetImageFilter .

See also

SegmentationLevelSetImageFilter

LaplacianSegmentationLevelSetFunction ,

SparseFieldLevelSetImageFilter

itk::simple::LaplacianSegmentationLevelSet for the procedural interface

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

Definition at line 89 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

Public Types
using	PixelIDTypeList = RealPixelIDTypeList
using	Self = LaplacianSegmentationLevelSetImageFilter
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)
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...
	LaplacianSegmentationLevelSetImageFilter ()
Self &	ReverseExpansionDirectionOff ()
Self &	ReverseExpansionDirectionOn ()
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	~LaplacianSegmentationLevelSetImageFilter ()
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_CurvatureScaling {1.0}
uint32_t	m_ElapsedIterations {0}
bool	m_InPlace {false}
double	m_MaximumRMSError {0.02}
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::LaplacianSegmentationLevelSetImageFilter::MemberFunctionType = Image (Self::*)( const Image * initialImage, const Image * featureImage )

private

Setup for member function dispatching

Definition at line 181 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

PixelIDTypeList

using itk::simple::LaplacianSegmentationLevelSetImageFilter::PixelIDTypeList = RealPixelIDTypeList

Define the pixels types supported by this filter

Definition at line 101 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

Self

using itk::simple::LaplacianSegmentationLevelSetImageFilter::Self = LaplacianSegmentationLevelSetImageFilter

Definition at line 91 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

Constructor & Destructor Documentation

~LaplacianSegmentationLevelSetImageFilter()

virtual itk::simple::LaplacianSegmentationLevelSetImageFilter::~LaplacianSegmentationLevelSetImageFilter ( )

virtual

Destructor

LaplacianSegmentationLevelSetImageFilter()

itk::simple::LaplacianSegmentationLevelSetImageFilter::LaplacianSegmentationLevelSetImageFilter

(

)

Default Constructor that takes no arguments and initializes default parameters

Member Function Documentation

Execute() [1/2]

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

Execute() [2/2]

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

Execute the filter on the input image

ExecuteInternal()

template<class TImageType >

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

private

GetCurvatureScaling()

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

inline

Definition at line 126 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

GetElapsedIterations()

uint32_t itk::simple::LaplacianSegmentationLevelSetImageFilter::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 153 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

GetMaximumRMSError()

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

inline

Definition at line 110 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

GetName()

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

inlinevirtual

Name of this class

Implements itk::simple::ProcessObject.

Definition at line 165 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

GetNumberOfIterations()

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

inline

Definition at line 134 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

GetPropagationScaling()

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

inline

Definition at line 118 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

GetReverseExpansionDirection()

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

inline

Definition at line 146 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

GetRMSChange()

double itk::simple::LaplacianSegmentationLevelSetImageFilter::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 161 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

ReverseExpansionDirectionOff()

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

inline

Definition at line 142 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

ReverseExpansionDirectionOn()

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

inline

Set the value of ReverseExpansionDirection to true or false respectfully.

Definition at line 141 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

SetCurvatureScaling()

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

inline

Definition at line 122 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

SetMaximumRMSError()

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

inline

Definition at line 106 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

SetNumberOfIterations()

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

inline

Definition at line 130 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

SetPropagationScaling()

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

inline

Definition at line 114 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

SetReverseExpansionDirection()

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

inline

Definition at line 138 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

ToString()

std::string itk::simple::LaplacianSegmentationLevelSetImageFilter::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 185 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

Member Data Documentation

m_CurvatureScaling

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

private

Definition at line 197 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

m_ElapsedIterations

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

private

Definition at line 206 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

m_InPlace

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

private

Definition at line 211 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

m_MaximumRMSError

double itk::simple::LaplacianSegmentationLevelSetImageFilter::m_MaximumRMSError {0.02}

private

Definition at line 191 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

m_MemberFactory

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

private

Definition at line 187 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

m_NumberOfIterations

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

private

Definition at line 200 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

m_PropagationScaling

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

private

Definition at line 194 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

m_ReverseExpansionDirection

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

private

Definition at line 203 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

m_RMSChange

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

private

Definition at line 208 of file sitkLaplacianSegmentationLevelSetImageFilter.h.

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

• sitkLaplacianSegmentationLevelSetImageFilter.h