This filter performs pixelwise voting among an arbitrary number of input images, where each of them represents a segmentation of the same scene (i.e., image). More...

#include <sitkLabelVotingImageFilter.h>

Inheritance diagram for itk::simple::LabelVotingImageFilter:

Collaboration diagram for itk::simple::LabelVotingImageFilter:

Detailed Description

This filter performs pixelwise voting among an arbitrary number of input images, where each of them represents a segmentation of the same scene (i.e., image).

Label voting is a simple method of classifier combination applied to image segmentation. Typically, the accuracy of the combined segmentation exceeds the accuracy of any of the input segmentations. Voting is therefore commonly used as a way of boosting segmentation performance.

The use of label voting for combination of multiple segmentations is described in

T. Rohlfing and C. R. Maurer, Jr., "Multi-classifier framework for atlas-based image segmentation," Pattern Recognition Letters, 2005.

INPUTS: All input volumes to this filter must be segmentations of an image, that is, they must have discrete pixel values where each value represents a different segmented object.

Input volumes must all contain the same size RequestedRegions. Not all input images must contain all possible labels, but all label values must have the same meaning in all images.

OUTPUTS: The voting filter produces a single output volume. Each output pixel contains the label that occurred most often among the labels assigned to this pixel in all the input volumes, that is, the label that received the maximum number of "votes" from the input pixels.. If the maximum number of votes is not unique, i.e., if more than one label have a maximum number of votes, an "undecided" label is assigned to that output pixel.

By default, the label used for undecided pixels is the maximum label value used in the input images plus one. Since it is possible for an image with 8 bit pixel values to use all 256 possible label values, it is permissible to combine 8 bit (i.e., byte) images into a 16 bit (i.e., short) output image.

PARAMETERS: The label used for "undecided" labels can be set using SetLabelForUndecidedPixels. This functionality can be unset by calling UnsetLabelForUndecidedPixels.

Author: Torsten Rohlfing, SRI International, Neuroscience Program

See also: itk::simple::LabelVoting for the procedural interface

Definition at line 65 of file sitkLabelVotingImageFilter.h.

Public Types
using	PixelIDTypeList = typelist2::typelist< BasicPixelID<uint8_t>, BasicPixelID<uint16_t>, BasicPixelID<uint32_t>, BasicPixelID<uint64_t> >

using	Self = LabelVotingImageFilter

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 &image1)

Image	Execute (const Image &image1, const Image &image2)

Image	Execute (const Image &image1, const Image &image2, const Image &image3)

Image	Execute (const Image &image1, const Image &image2, const Image &image3, const Image &image4)

Image	Execute (const Image &image1, const Image &image2, const Image &image3, const Image &image4, const Image &image5)

Image	Execute (const std::vector< Image > &images)

uint64_t	GetLabelForUndecidedPixels () const

std::string	GetName () const

	LabelVotingImageFilter ()

Self &	SetLabelForUndecidedPixels (uint64_t LabelForUndecidedPixels)

std::string	ToString () const

virtual	~LabelVotingImageFilter ()

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 = Image (Self::*)( const std::vector<Image> & )

Private Member Functions
template<class TImageType>
Image	ExecuteInternal (const std::vector< Image > &images)

Private Attributes
uint64_t	m_LabelForUndecidedPixels {std::numeric_limits<uint64_t>::max()}

std::unique_ptr< detail::MemberFunctionFactory< MemberFunctionType > >	m_MemberFactory

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::LabelVotingImageFilter::MemberFunctionType = Image (Self::*)( const std::vector<Image> & )

private

Setup for member function dispatching

Definition at line 116 of file sitkLabelVotingImageFilter.h.

◆ PixelIDTypeList

using itk::simple::LabelVotingImageFilter::PixelIDTypeList = typelist2::typelist< BasicPixelID<uint8_t>, BasicPixelID<uint16_t>, BasicPixelID<uint32_t>, BasicPixelID<uint64_t> >

Define the pixels types supported by this filter

Definition at line 80 of file sitkLabelVotingImageFilter.h.

◆ Self

using itk::simple::LabelVotingImageFilter::Self = LabelVotingImageFilter

Definition at line 69 of file sitkLabelVotingImageFilter.h.

Constructor & Destructor Documentation

◆ ~LabelVotingImageFilter()

virtual itk::simple::LabelVotingImageFilter::~LabelVotingImageFilter ( )

virtual

Destructor

◆ LabelVotingImageFilter()

itk::simple::LabelVotingImageFilter::LabelVotingImageFilter ( )

Default Constructor that takes no arguments and initializes default parameters

Member Function Documentation

◆ Execute() [1/6]

Image itk::simple::LabelVotingImageFilter::Execute ( const Image & image1 )

◆ Execute() [2/6]

Image itk::simple::LabelVotingImageFilter::Execute	(	const Image &	image1,
		const Image &	image2 )

◆ Execute() [3/6]

Image itk::simple::LabelVotingImageFilter::Execute	(	const Image &	image1,
		const Image &	image2,
		const Image &	image3 )

◆ Execute() [4/6]

Image itk::simple::LabelVotingImageFilter::Execute	(	const Image &	image1,
		const Image &	image2,
		const Image &	image3,
		const Image &	image4 )

◆ Execute() [5/6]

Image itk::simple::LabelVotingImageFilter::Execute	(	const Image &	image1,
		const Image &	image2,
		const Image &	image3,
		const Image &	image4,
		const Image &	image5 )

◆ Execute() [6/6]

Image itk::simple::LabelVotingImageFilter::Execute ( const std::vector< Image > & images )

Execute the filter on the input images

References itk::images.

◆ ExecuteInternal()

template<class TImageType>

Image itk::simple::LabelVotingImageFilter::ExecuteInternal ( const std::vector< Image > & images )

private

Referenced by detail::MemberFunctionAddressor< MemberFunctionType >.

◆ GetLabelForUndecidedPixels()

uint64_t itk::simple::LabelVotingImageFilter::GetLabelForUndecidedPixels ( ) const

inline

Get label value used for undecided pixels. After updating the filter, this function returns the actual label value used for undecided pixels in the current output. Note that this value is overwritten when SetLabelForUndecidedPixels is called and the new value only becomes effective upon the next filter update.

Definition at line 93 of file sitkLabelVotingImageFilter.h.

References m_LabelForUndecidedPixels.