Detailed Description

template<typename TLabelObject>
class itk::LabelMap< TLabelObject >

Templated n-dimensional image to store labeled objects.

LabelMap is an image class specialized in storing the labeled images. It represent the image in a different way than itk::Image. Instead of storing the content of the image in an array of pixels values, it store the a collection of labeled objects, and a background value. This way of storing the content of the image allow an easy and efficient manipulation of the objects in the image.

The LabelMap shares a lot of methods with the itk::Image class. it make it usable as input or output of the itk::ImageToImageFilter for example. However the methods don't have the same complexity in the 2 classes, because of the different way to store the data. GetPixel() is run in constant time for example in itk::Image, but have a worst case complexity of O(L), where L is the number of lines in the image (imageSize[1] * imageSize[2] for a 3D image).

To iterate over the LabelObjects in the map, use:

* for(unsigned int i = 0; i < filter->GetOutput()->GetNumberOfLabelObjects(); ++i)
*   {
*   FilterType::OutputImageType::LabelObjectType* labelObject =
*     filter->GetOutput()->GetNthLabelObject(i);
*   }
* 

Author: Gaetan Lehmann. Biologie du Developpement et de la Reproduction, INRA de Jouy-en-Josas, France.

This implementation was taken from the Insight Journal paper: https://hdl.handle.net/1926/584 or http://www.insight-journal.org/browse/publication/176

Wiki Examples:

Examples:: SphinxExamples/src/Filtering/ImageFusion/OverlayLabelMapOnTopOfAnImage/Code.cxx, SphinxExamples/src/Filtering/LabelMap/ApplyMorphologicalClosingOnAllLabelObjects/Code.cxx, SphinxExamples/src/Filtering/LabelMap/ApplyMorphologicalClosingOnSpecificLabelObject/Code.cxx, SphinxExamples/src/Filtering/LabelMap/ExtractGivenLabelObject/Code.cxx, SphinxExamples/src/Filtering/LabelMap/MaskOneImageGivenLabelMap/Code.cxx, and WikiExamples/ImageProcessing/ShapeAttributes.cxx.

Definition at line 70 of file itkLabelMap.h.

Classes
class	ConstIterator

class	Iterator

Public Types
typedef SmartPointer< const Self >	ConstPointer

typedef WeakPointer< const Self >	ConstWeakPointer

typedef Superclass::DirectionType	DirectionType

typedef Superclass::IndexType	IndexType

typedef LabelObjectType::Pointer	LabelObjectPointerType

typedef TLabelObject	LabelObjectType

typedef std::vector < LabelObjectPointerType >	LabelObjectVectorType

typedef LabelObjectType::LabelType	LabelType

typedef std::vector< LabelType >	LabelVectorType

typedef SizeValueType	LengthType

typedef Superclass::OffsetType	OffsetType

typedef Superclass::OffsetValueType	OffsetValueType

typedef LabelType	PixelType

typedef SmartPointer< Self >	Pointer

typedef Superclass::PointType	PointType

typedef Superclass::RegionType	RegionType

typedef LabelMap	Self

typedef Superclass::SizeType	SizeType

typedef Superclass::SizeValueType	SizeValueType

typedef Superclass::SpacingType	SpacingType

typedef ImageBase < TLabelObject::ImageDimension >	Superclass

Public Types inherited from itk::ImageBase< TLabelObject::ImageDimension >
typedef SmartPointer< const Self >	ConstPointer

typedef Matrix < SpacePrecisionType, VImageDimension, VImageDimension >	DirectionType

typedef unsigned int	ImageDimensionType

typedef Index< VImageDimension >	IndexType

typedef IndexType::IndexValueType	IndexValueType

typedef Offset< VImageDimension >	OffsetType

typedef OffsetType::OffsetValueType	OffsetValueType

typedef SmartPointer< Self >	Pointer

typedef Point< PointValueType, VImageDimension >	PointType

typedef SpacePrecisionType	PointValueType

typedef ImageRegion < VImageDimension >	RegionType

typedef ImageBase	Self

typedef Size< VImageDimension >	SizeType

typedef SizeType::SizeValueType	SizeValueType

typedef Vector < SpacingValueType, VImageDimension >	SpacingType

typedef SpacePrecisionType	SpacingValueType

typedef DataObject	Superclass

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

typedef std::string	DataObjectIdentifierType

typedef std::vector< Pointer > ::size_type	DataObjectPointerArraySizeType

typedef SmartPointer< Self >	Pointer

typedef DataObject	Self

typedef Object	Superclass

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

typedef SmartPointer< Self >	Pointer

typedef Object	Self

typedef LightObject	Superclass

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

typedef SmartPointer< Self >	Pointer

typedef LightObject	Self

Public Member Functions
void	AddLabelObject (LabelObjectType *labelObject)

void	AddPixel (const IndexType &idx, const LabelType &label)

virtual void	Allocate (bool initialize=false) override

void	ClearLabels ()

virtual ::itk::LightObject::Pointer	CreateAnother () const

LabelObjectType *	GetLabelObject (const IndexType &idx) const

LabelObjectVectorType	GetLabelObjects () const

LabelVectorType	GetLabels () const

virtual const char *	GetNameOfClass () const

Self::SizeValueType	GetNumberOfLabelObjects () const

const LabelType &	GetPixel (const IndexType &idx) const

virtual void	Graft (const Self *imgData)

bool	HasLabel (const LabelType label) const

virtual void	Initialize () override

void	Optimize ()

void	PrintLabelObjects (std::ostream &os) const

void	PrintLabelObjects () const

void	PushLabelObject (LabelObjectType *labelObject)

void	RemoveLabel (const LabelType &label)

void	RemoveLabelObject (LabelObjectType *labelObject)

void	RemovePixel (const IndexType &idx, const LabelType &label)

void	SetLine (const IndexType &idx, const LengthType &length, const LabelType &label)

void	SetPixel (const IndexType &idx, const LabelType &label)


LabelObjectType *	GetLabelObject (const LabelType &label)

const LabelObjectType *	GetLabelObject (const LabelType &label) const


LabelObjectType *	GetNthLabelObject (const SizeValueType &pos)

const LabelObjectType *	GetNthLabelObject (const SizeValueType &pos) const


virtual LabelType	GetBackgroundValue () const

virtual void	SetBackgroundValue (LabelType _arg)

Public Member Functions inherited from itk::ImageBase< TLabelObject::ImageDimension >
OffsetValueType	ComputeOffset (const IndexType &ind) const

virtual void	CopyInformation (const DataObject *data) override

virtual ::itk::LightObject::Pointer	CreateAnother () const

virtual const RegionType &	GetBufferedRegion () const

virtual const DirectionType &	GetDirection () const

virtual const DirectionType &	GetInverseDirection () const

virtual const RegionType &	GetLargestPossibleRegion () const

virtual const PointType &	GetOrigin () const

virtual const RegionType &	GetRequestedRegion () const

virtual const SpacingType &	GetSpacing () const

virtual bool	RequestedRegionIsOutsideOfTheBufferedRegion () override

virtual void	SetBufferedRegion (const RegionType &region)

virtual void	SetDirection (const DirectionType &direction)

virtual void	SetLargestPossibleRegion (const RegionType &region)

virtual void	SetRegions (const SizeType &size)

virtual void	SetRequestedRegion (const RegionType &region)

virtual void	SetRequestedRegion (const DataObject *data) override

virtual void	SetRequestedRegionToLargestPossibleRegion () override

void	TransformLocalVectorToPhysicalVector (const FixedArray< TCoordRep, VImageDimension > &inputGradient, FixedArray< TCoordRep, VImageDimension > &outputGradient) const

bool	TransformPhysicalPointToContinuousIndex (const Point< TCoordRep, VImageDimension > &point, ContinuousIndex< TIndexRep, VImageDimension > &index) const

bool	TransformPhysicalPointToIndex (const Point< TCoordRep, VImageDimension > &point, IndexType &index) const

void	TransformPhysicalVectorToLocalVector (const FixedArray< TCoordRep, VImageDimension > &inputGradient, FixedArray< TCoordRep, VImageDimension > &outputGradient) const

virtual void	UpdateOutputData () override

virtual void	UpdateOutputInformation () override

virtual bool	VerifyRequestedRegion () override

virtual void	SetOrigin (PointType _arg)

virtual void	SetOrigin (const double origin[VImageDimension])

virtual void	SetOrigin (const float origin[VImageDimension])

virtual void	SetRegions (const RegionType &region)

const OffsetValueType *	GetOffsetTable () const

IndexType	ComputeIndex (OffsetValueType offset) const

virtual void	SetSpacing (const SpacingType &spacing)

virtual void	SetSpacing (const double spacing[VImageDimension])

virtual void	SetSpacing (const float spacing[VImageDimension])

void	TransformContinuousIndexToPhysicalPoint (const ContinuousIndex< TIndexRep, VImageDimension > &index, Point< TCoordRep, VImageDimension > &point) const

void	TransformIndexToPhysicalPoint (const IndexType &index, Point< TCoordRep, VImageDimension > &point) const

virtual unsigned int	GetNumberOfComponentsPerPixel () const

virtual void	SetNumberOfComponentsPerPixel (unsigned int)

Public Member Functions inherited from itk::DataObject
virtual void	DataHasBeenGenerated ()

void	DisconnectPipeline ()

bool	GetDataReleased () const

virtual const bool &	GetReleaseDataFlag () const

SmartPointerForwardReference < ProcessObject >	GetSource () const

DataObjectPointerArraySizeType	GetSourceOutputIndex () const

const DataObjectIdentifierType &	GetSourceOutputName () const

virtual ModifiedTimeType	GetUpdateMTime () const

virtual void	PrepareForNewData ()

virtual void	PropagateRequestedRegion ()

void	ReleaseData ()

virtual void	ReleaseDataFlagOff ()

virtual void	ReleaseDataFlagOn ()

virtual void	ResetPipeline ()

void	SetReleaseDataFlag (bool flag)

bool	ShouldIReleaseData () const

virtual void	Update ()

void	SetPipelineMTime (ModifiedTimeType time)

virtual const ModifiedTimeType &	GetPipelineMTime () const

virtual void	SetRealTimeStamp (RealTimeStamp _arg)

virtual const RealTimeStamp &	GetRealTimeStamp () const

Public Member Functions inherited from itk::Object
unsigned long	AddObserver (const EventObject &event, Command *)

unsigned long	AddObserver (const EventObject &event, Command *) const

virtual void	DebugOff () const

virtual void	DebugOn () const

Command *	GetCommand (unsigned long tag)

bool	GetDebug () const

MetaDataDictionary &	GetMetaDataDictionary ()

const MetaDataDictionary &	GetMetaDataDictionary () const

virtual ModifiedTimeType	GetMTime () const

virtual const TimeStamp &	GetTimeStamp () const

bool	HasObserver (const EventObject &event) const

void	InvokeEvent (const EventObject &)

void	InvokeEvent (const EventObject &) const

virtual void	Modified () const

virtual void	Register () const override

void	RemoveAllObservers ()

void	RemoveObserver (unsigned long tag)

void	SetDebug (bool debugFlag) const

void	SetMetaDataDictionary (const MetaDataDictionary &rhs)

virtual void	SetReferenceCount (int) override

virtual void	UnRegister () const noexceptoverride

virtual void	SetObjectName (std::string _arg)

virtual const std::string &	GetObjectName () const

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

Static Public Member Functions
static Pointer	New ()

Static Public Member Functions inherited from itk::ImageBase< TLabelObject::ImageDimension >
static unsigned int	GetImageDimension ()

static Pointer	New ()

Static Public Member Functions inherited from itk::DataObject
static bool	GetGlobalReleaseDataFlag ()

static void	GlobalReleaseDataFlagOff ()

static void	GlobalReleaseDataFlagOn ()

static void	SetGlobalReleaseDataFlag (bool val)

Static Public Member Functions inherited from itk::Object
static bool	GetGlobalWarningDisplay ()

static void	GlobalWarningDisplayOff ()

static void	GlobalWarningDisplayOn ()

static Pointer	New ()

static void	SetGlobalWarningDisplay (bool flag)

Static Public Member Functions inherited from itk::LightObject
static void	BreakOnError ()

static Pointer	New ()

Static Public Attributes
static const unsigned int	ImageDimension = LabelObjectType::ImageDimension

Static Public Attributes inherited from itk::ImageBase< TLabelObject::ImageDimension >
static const ImageDimensionType	ImageDimension

Protected Member Functions
virtual void	Graft (const DataObject *data) override

	LabelMap ()

void	PrintSelf (std::ostream &os, Indent indent) const override

virtual	~LabelMap () override

Protected Member Functions inherited from itk::ImageBase< TLabelObject::ImageDimension >
virtual void	ComputeIndexToPhysicalPointMatrices ()

void	ComputeOffsetTable ()

	ImageBase ()

virtual void	InitializeBufferedRegion ()

	~ImageBase () override

OffsetValueType	FastComputeOffset (const IndexType &ind) const

IndexType	FastComputeIndex (OffsetValueType offset) const

Protected Member Functions inherited from itk::DataObject
	DataObject ()

virtual void	PropagateResetPipeline ()

virtual	~DataObject () override

Protected Member Functions inherited from itk::Object
	Object ()

bool	PrintObservers (std::ostream &os, Indent indent) const

virtual void	SetTimeStamp (const TimeStamp &time)

virtual	~Object () override

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 Types
typedef LabelObjectContainerType::const_iterator	LabelObjectContainerConstIterator

typedef LabelObjectContainerType::iterator	LabelObjectContainerIterator

typedef std::map< LabelType, LabelObjectPointerType >	LabelObjectContainerType

Private Member Functions
void	AddPixel (const LabelObjectContainerIterator &it, const IndexType &idx, const LabelType &iLabel)

void	RemovePixel (const LabelObjectContainerIterator &it, const IndexType &idx, bool iEmitModifiedEvent)

Private Attributes
LabelType	m_BackgroundValue

LabelObjectContainerType	m_LabelObjectContainer

Additional Inherited Members
Protected Attributes inherited from itk::ImageBase< TLabelObject::ImageDimension >
DirectionType	m_Direction

DirectionType	m_IndexToPhysicalPoint

DirectionType	m_InverseDirection

PointType	m_Origin

DirectionType	m_PhysicalPointToIndex

SpacingType	m_Spacing

Protected Attributes inherited from itk::LightObject
AtomicInt< int >	m_ReferenceCount