Label the objects in a binary image. More...

#include <sitkConnectedComponentImageFilter.h>

Inheritance diagram for itk::simple::ConnectedComponentImageFilter:

Collaboration diagram for itk::simple::ConnectedComponentImageFilter:

Detailed Description

Label the objects in a binary image.

ConnectedComponentImageFilter labels the objects in a binary image (non-zero pixels are considered to be objects, zero-valued pixels are considered to be background). Each distinct object is assigned a unique label. The filter experiments with some improvements to the existing implementation, and is based on run length encoding along raster lines. If the output background value is set to zero (the default), the final object labels start with 1 and are consecutive. If the output background is set to a non-zero value (by calling the SetBackgroundValue() routine of the filter), the final labels start at 0, and remain consecutive except for skipping the background value as needed. Objects that are reached earlier by a raster order scan have a lower label. This is different to the behaviour of the original connected component image filter which did not produce consecutive labels or impose any particular ordering.

After the filter is executed, ObjectCount holds the number of connected components.

See also: ImageToImageFilter; itk::simple::ConnectedComponent for the procedural interface; itk::ConnectedComponentImageFilter for the Doxygen on the original ITK class.

Definition at line 54 of file sitkConnectedComponentImageFilter.h.

Public Types
using	PixelIDTypeList = IntegerPixelIDTypeList

using	Self = ConnectedComponentImageFilter

Public Types inherited from itk::simple::ImageFilter
using	Self = ImageFilter

Public Types inherited from itk::simple::ProcessObject
using	Self = ProcessObject

Public Member Functions
	ConnectedComponentImageFilter ()

Image	Execute (const Image &image)

Image	Execute (const Image &image, const Image &maskImage)

void	FullyConnectedOff ()

void	FullyConnectedOn ()

bool	GetFullyConnected () const

std::string	GetName () const

uint32_t	GetObjectCount () const

void	SetFullyConnected (bool FullyConnected)

std::string	ToString () const

virtual	~ConnectedComponentImageFilter ()

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.

virtual int	AddCommand (itk::simple::EventEnum event, itk::simple::Command &cmd)
	Add a Command Object to observer the event.

virtual float	GetProgress () const
	An Active Measurement of the progress of execution.

virtual bool	HasCommand (itk::simple::EventEnum event) const
	Query of this object has any registered commands for event.

	ProcessObject ()

virtual void	RemoveAllCommands ()
	Remove all registered commands.

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

Private Member Functions
template<class TImageType>
Image	ExecuteInternal (const Image image, const Image maskImage)

Static Private Member Functions
static const detail::MemberFunctionFactory< MemberFunctionType > &	GetMemberFunctionFactory ()

Private Attributes
bool	m_FullyConnected { false }

uint32_t	m_ObjectCount { 0u }

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.

static void	SetGlobalDefaultCoordinateTolerance (double)
	Access the global tolerance to determine congruent spaces.

static double	GetGlobalDefaultDirectionTolerance ()
	Access the global tolerance to determine congruent spaces.

static void	SetGlobalDefaultDirectionTolerance (double)
	Access the global tolerance to determine congruent spaces.

static bool	SetGlobalDefaultThreader (const std::string &threader)
	Set/Get the default threader used for process objects.

static std::string	GetGlobalDefaultThreader ()
	Set/Get the default threader used for process objects.

static void	SetGlobalDefaultNumberOfThreads (unsigned int n)

static unsigned int	GetGlobalDefaultNumberOfThreads ()
	Set/Get the default threader used for process objects.

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::ConnectedComponentImageFilter::MemberFunctionType

private

Initial value:

 Image (Self::*)(const Image *
    image, const Image *
    maskImage)

Setup for member function dispatching

Definition at line 113 of file sitkConnectedComponentImageFilter.h.

◆ PixelIDTypeList

using itk::simple::ConnectedComponentImageFilter::PixelIDTypeList = IntegerPixelIDTypeList

Define the pixels types supported by this filter

Definition at line 66 of file sitkConnectedComponentImageFilter.h.

◆ Self

using itk::simple::ConnectedComponentImageFilter::Self = ConnectedComponentImageFilter

Definition at line 56 of file sitkConnectedComponentImageFilter.h.

Constructor & Destructor Documentation

◆ ~ConnectedComponentImageFilter()

virtual itk::simple::ConnectedComponentImageFilter::~ConnectedComponentImageFilter ( )

virtual

Destructor

◆ ConnectedComponentImageFilter()

itk::simple::ConnectedComponentImageFilter::ConnectedComponentImageFilter ( )

Default Constructor that takes no arguments and initializes default parameters

Member Function Documentation

◆ Execute() [1/2]

Image itk::simple::ConnectedComponentImageFilter::Execute ( const Image & image )

◆ Execute() [2/2]

Image itk::simple::ConnectedComponentImageFilter::Execute	(	const Image &	image,
		const Image &	maskImage )

Execute the filter on the input image

◆ ExecuteInternal()

template<class TImageType>

Image itk::simple::ConnectedComponentImageFilter::ExecuteInternal	(	const Image *	image,
		const Image *	maskImage )

private

Referenced by detail::MemberFunctionAddressor< MemberFunctionType >.

◆ FullyConnectedOff()

void itk::simple::ConnectedComponentImageFilter::FullyConnectedOff ( )

inline

Definition at line 83 of file sitkConnectedComponentImageFilter.h.

References SetFullyConnected().

◆ FullyConnectedOn()

void itk::simple::ConnectedComponentImageFilter::FullyConnectedOn ( )

inline

Set the value of FullyConnected to true or false respectfully.

Definition at line 81 of file sitkConnectedComponentImageFilter.h.

References SetFullyConnected().

◆ GetFullyConnected()

bool itk::simple::ConnectedComponentImageFilter::GetFullyConnected ( ) const

inline

Set/Get whether the connected components are defined strictly by face connectivity or by face+edge+vertex connectivity. Default is FullyConnectedOff. For objects that are 1 pixel wide, use FullyConnectedOn.

Definition at line 89 of file sitkConnectedComponentImageFilter.h.

References m_FullyConnected.

◆ GetMemberFunctionFactory()

static const detail::MemberFunctionFactory< MemberFunctionType > & itk::simple::ConnectedComponentImageFilter::GetMemberFunctionFactory ( )

staticprivate

◆ GetName()

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

inlinevirtual

Name of this class

Implements itk::simple::ProcessObject.

Definition at line 100 of file sitkConnectedComponentImageFilter.h.

◆ GetObjectCount()

uint32_t itk::simple::ConnectedComponentImageFilter::GetObjectCount ( ) const

inline

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 97 of file sitkConnectedComponentImageFilter.h.

References m_ObjectCount.

◆ SetFullyConnected()

void itk::simple::ConnectedComponentImageFilter::SetFullyConnected ( bool FullyConnected )

inline

Set/Get whether the connected components are defined strictly by face connectivity or by face+edge+vertex connectivity. Default is FullyConnectedOff. For objects that are 1 pixel wide, use FullyConnectedOn.

Definition at line 76 of file sitkConnectedComponentImageFilter.h.

References m_FullyConnected.

Referenced by FullyConnectedOff(), and FullyConnectedOn().