itk::simple::FastMarchingUpwindGradientImageFilter Class Reference

Generates the upwind gradient field of fast marching arrival times. More...

#include <sitkFastMarchingUpwindGradientImageFilter.h>

Inheritance diagram for itk::simple::FastMarchingUpwindGradientImageFilter:

Collaboration diagram for itk::simple::FastMarchingUpwindGradientImageFilter:

Detailed Description

Generates the upwind gradient field of fast marching arrival times.

This filter adds some extra functionality to its base class. While the solution T(x) of the Eikonal equation is being generated by the base class with the fast marching method, the filter generates the upwind gradient vectors of T(x), storing them in an image.

Since the Eikonal equation generates the arrival times of a wave traveling at a given speed, the generated gradient vectors can be interpreted as the slowness (1/velocity) vectors of the front (the quantity inside the modulus operator in the Eikonal equation).

Gradient vectors are computed using upwind finite differences, that is, information only propagates from points where the wavefront has already passed. This is consistent with how the fast marching method works.

One more extra feature is the possibility to define a set of Target points where the propagation stops. This can be used to avoid computing the Eikonal solution for the whole domain. The front can be stopped either when one Target point is reached or all Target points are reached. The propagation can stop after a time TargetOffset has passed since the stop condition is met. This way the solution is computed a bit downstream the Target points, so that the level sets of T(x) corresponding to the Target are smooth.

For an alternative implementation, see itk::FastMarchingUpwindGradientImageFilterBase .

Author

Luca Antiga Ph.D. Biomedical Technologies Laboratory, Bioengineering Department, Mario Negri Institute, Italy.

See also

itk::simple::FastMarchingUpwindGradient for the procedural interface

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

Definition at line 51 of file sitkFastMarchingUpwindGradientImageFilter.h.

Public Types
using	PixelIDTypeList = BasicPixelIDTypeList
using	Self = FastMarchingUpwindGradientImageFilter
Public Types inherited from itk::simple::ImageFilter
using	Self = ImageFilter
Public Types inherited from itk::simple::ProcessObject
using	Self = ProcessObject

Public Member Functions
Self &	AddTargetPoint (std::vector< unsigned int > point)
	Add TargetPoints point. More...
Self &	AddTrialPoint (std::vector< unsigned int > point)
	Add TrialPoints point. More...
Self &	ClearTargetPoints ()
	Remove all TargetPoints points. More...
Self &	ClearTrialPoints ()
	Remove all TrialPoints points. More...
Image	Execute (const Image &image1)
	FastMarchingUpwindGradientImageFilter ()
Image	GetGradientImage () const
std::vector< double >	GetInitialTrialValues () const
std::string	GetName () const
double	GetNormalizationFactor () const
unsigned int	GetNumberOfTargets () const
double	GetTargetOffset () const
std::vector< std::vector< unsigned int > >	GetTargetPoints () const
double	GetTargetValue () const
std::vector< std::vector< unsigned int > >	GetTrialPoints () const
Self &	SetInitialTrialValues (std::vector< double > InitialTrialValues)
	Set the initial seed values for corresponding trial point. More...
Self &	SetNormalizationFactor (double NormalizationFactor)
Self &	SetNumberOfTargets (unsigned int NumberOfTargets)
Self &	SetTargetOffset (double TargetOffset)
Self &	SetTargetPoints (std::vector< std::vector< unsigned int > > TargetPoints)
Self &	SetTrialPoints (std::vector< std::vector< unsigned int > > TrialPoints)
std::string	ToString () const
virtual	~FastMarchingUpwindGradientImageFilter ()
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 &image1)

Private Member Functions
template<class TImageType >
Image	ExecuteInternal (const Image &image1)

Private Attributes
Image	m_GradientImage {Image()}
std::vector< double >	m_InitialTrialValues {std::vector<double>()}
std::unique_ptr< detail::MemberFunctionFactory< MemberFunctionType > >	m_MemberFactory
double	m_NormalizationFactor {1.0}
unsigned int	m_NumberOfTargets {0u}
double	m_TargetOffset {1.0}
std::vector< std::vector< unsigned int > >	m_TargetPoints {std::vector< std::vector<unsigned int > >()}
double	m_TargetValue {0.0}
std::vector< std::vector< unsigned int > >	m_TrialPoints {std::vector< std::vector<unsigned int > >()}

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::FastMarchingUpwindGradientImageFilter::MemberFunctionType = Image (Self::*)( const Image& image1 )

private

Setup for member function dispatching

Definition at line 163 of file sitkFastMarchingUpwindGradientImageFilter.h.

PixelIDTypeList

using itk::simple::FastMarchingUpwindGradientImageFilter::PixelIDTypeList = BasicPixelIDTypeList

Define the pixels types supported by this filter

Definition at line 63 of file sitkFastMarchingUpwindGradientImageFilter.h.

Self

using itk::simple::FastMarchingUpwindGradientImageFilter::Self = FastMarchingUpwindGradientImageFilter

Definition at line 53 of file sitkFastMarchingUpwindGradientImageFilter.h.

Constructor & Destructor Documentation

~FastMarchingUpwindGradientImageFilter()

virtual itk::simple::FastMarchingUpwindGradientImageFilter::~FastMarchingUpwindGradientImageFilter ( )

virtual

Destructor

FastMarchingUpwindGradientImageFilter()

itk::simple::FastMarchingUpwindGradientImageFilter::FastMarchingUpwindGradientImageFilter

(

)

Default Constructor that takes no arguments and initializes default parameters

Member Function Documentation

AddTargetPoint()

Self& itk::simple::FastMarchingUpwindGradientImageFilter::AddTargetPoint ( std::vector< unsigned int >  point )

inline

Add TargetPoints point.

Definition at line 98 of file sitkFastMarchingUpwindGradientImageFilter.h.

References itk::point().

AddTrialPoint()

Self& itk::simple::FastMarchingUpwindGradientImageFilter::AddTrialPoint ( std::vector< unsigned int >  point )

inline

Add TrialPoints point.

Definition at line 74 of file sitkFastMarchingUpwindGradientImageFilter.h.

References itk::point().

ClearTargetPoints()

Self& itk::simple::FastMarchingUpwindGradientImageFilter::ClearTargetPoints ( )

inline

Remove all TargetPoints points.

Definition at line 100 of file sitkFastMarchingUpwindGradientImageFilter.h.

ClearTrialPoints()

Self& itk::simple::FastMarchingUpwindGradientImageFilter::ClearTrialPoints ( )

inline

Remove all TrialPoints points.

Definition at line 76 of file sitkFastMarchingUpwindGradientImageFilter.h.

Execute()

Image itk::simple::FastMarchingUpwindGradientImageFilter::Execute

(

const Image &

image1

)

Execute the filter on the input image

ExecuteInternal()

template<class TImageType >

Image itk::simple::FastMarchingUpwindGradientImageFilter::ExecuteInternal ( const Image &  image1 )

private

GetGradientImage()

Image itk::simple::FastMarchingUpwindGradientImageFilter::GetGradientImage ( ) const

inline

Get the gradient image.

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 137 of file sitkFastMarchingUpwindGradientImageFilter.h.

GetInitialTrialValues()

std::vector<double> itk::simple::FastMarchingUpwindGradientImageFilter::GetInitialTrialValues ( ) const

inline

Definition at line 130 of file sitkFastMarchingUpwindGradientImageFilter.h.

GetName()

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

inlinevirtual

Name of this class

Implements itk::simple::ProcessObject.

Definition at line 149 of file sitkFastMarchingUpwindGradientImageFilter.h.

GetNormalizationFactor()

double itk::simple::FastMarchingUpwindGradientImageFilter::GetNormalizationFactor ( ) const

inline

Set/Get the Normalization Factor for the Speed Image . The values in the Speed Image is divided by this factor. This allows the use of images with integer pixel types to represent the speed.

Definition at line 121 of file sitkFastMarchingUpwindGradientImageFilter.h.

GetNumberOfTargets()

unsigned int itk::simple::FastMarchingUpwindGradientImageFilter::GetNumberOfTargets ( ) const

inline

Get the number of targets.

Definition at line 86 of file sitkFastMarchingUpwindGradientImageFilter.h.

GetTargetOffset()

double itk::simple::FastMarchingUpwindGradientImageFilter::GetTargetOffset ( ) const

inline

Get the TargetOffset ivar.

Definition at line 111 of file sitkFastMarchingUpwindGradientImageFilter.h.

GetTargetPoints()

std::vector< std::vector< unsigned int > > itk::simple::FastMarchingUpwindGradientImageFilter::GetTargetPoints ( ) const

inline

Get the container of Target Points.

Definition at line 96 of file sitkFastMarchingUpwindGradientImageFilter.h.

GetTargetValue()

double itk::simple::FastMarchingUpwindGradientImageFilter::GetTargetValue ( ) const

inline

Get the arrival time corresponding to the last reached target. If TargetReachedMode is set to TargetConditionEnum::NoTargets , TargetValue contains the last (aka largest) Eikonal solution value generated.

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 145 of file sitkFastMarchingUpwindGradientImageFilter.h.

GetTrialPoints()

std::vector< std::vector< unsigned int > > itk::simple::FastMarchingUpwindGradientImageFilter::GetTrialPoints ( ) const

inline

Definition at line 72 of file sitkFastMarchingUpwindGradientImageFilter.h.

SetInitialTrialValues()

Self& itk::simple::FastMarchingUpwindGradientImageFilter::SetInitialTrialValues ( std::vector< double >  InitialTrialValues )

inline

Set the initial seed values for corresponding trial point.

Definition at line 126 of file sitkFastMarchingUpwindGradientImageFilter.h.

SetNormalizationFactor()

Self& itk::simple::FastMarchingUpwindGradientImageFilter::SetNormalizationFactor ( double  NormalizationFactor )

inline

Set/Get the Normalization Factor for the Speed Image . The values in the Speed Image is divided by this factor. This allows the use of images with integer pixel types to represent the speed.

Definition at line 116 of file sitkFastMarchingUpwindGradientImageFilter.h.

SetNumberOfTargets()

Self& itk::simple::FastMarchingUpwindGradientImageFilter::SetNumberOfTargets ( unsigned int  NumberOfTargets )

inline

Definition at line 81 of file sitkFastMarchingUpwindGradientImageFilter.h.

SetTargetOffset()

Self& itk::simple::FastMarchingUpwindGradientImageFilter::SetTargetOffset ( double  TargetOffset )

inline

Set how long (in terms of arrival times) after targets are reached the front must stop. This is useful to ensure that the level set of target arrival time is smooth.

Definition at line 106 of file sitkFastMarchingUpwindGradientImageFilter.h.

SetTargetPoints()

Self& itk::simple::FastMarchingUpwindGradientImageFilter::SetTargetPoints ( std::vector< std::vector< unsigned int > >  TargetPoints )

inline

Backwards compatibility for enum values Set the container of Target Points. If a target point is reached, the propagation stops. Trial points are represented as a VectorContainer of LevelSetNodes.

Definition at line 91 of file sitkFastMarchingUpwindGradientImageFilter.h.

SetTrialPoints()

Self& itk::simple::FastMarchingUpwindGradientImageFilter::SetTrialPoints ( std::vector< std::vector< unsigned int > >  TrialPoints )

inline

Definition at line 68 of file sitkFastMarchingUpwindGradientImageFilter.h.

ToString()

std::string itk::simple::FastMarchingUpwindGradientImageFilter::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 167 of file sitkFastMarchingUpwindGradientImageFilter.h.

Member Data Documentation

m_GradientImage

Image itk::simple::FastMarchingUpwindGradientImageFilter::m_GradientImage {Image()}

private

Definition at line 185 of file sitkFastMarchingUpwindGradientImageFilter.h.

m_InitialTrialValues

std::vector<double> itk::simple::FastMarchingUpwindGradientImageFilter::m_InitialTrialValues {std::vector<double>()}

private

Definition at line 182 of file sitkFastMarchingUpwindGradientImageFilter.h.

m_MemberFactory

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

private

Definition at line 169 of file sitkFastMarchingUpwindGradientImageFilter.h.

m_NormalizationFactor

double itk::simple::FastMarchingUpwindGradientImageFilter::m_NormalizationFactor {1.0}

private

Definition at line 180 of file sitkFastMarchingUpwindGradientImageFilter.h.

m_NumberOfTargets

unsigned int itk::simple::FastMarchingUpwindGradientImageFilter::m_NumberOfTargets {0u}

private

Definition at line 174 of file sitkFastMarchingUpwindGradientImageFilter.h.

m_TargetOffset

double itk::simple::FastMarchingUpwindGradientImageFilter::m_TargetOffset {1.0}

private

Definition at line 178 of file sitkFastMarchingUpwindGradientImageFilter.h.

m_TargetPoints

std::vector< std::vector<unsigned int> > itk::simple::FastMarchingUpwindGradientImageFilter::m_TargetPoints {std::vector< std::vector<unsigned int > >()}

private

Definition at line 176 of file sitkFastMarchingUpwindGradientImageFilter.h.

m_TargetValue

double itk::simple::FastMarchingUpwindGradientImageFilter::m_TargetValue {0.0}

private

Definition at line 187 of file sitkFastMarchingUpwindGradientImageFilter.h.

m_TrialPoints

std::vector< std::vector<unsigned int> > itk::simple::FastMarchingUpwindGradientImageFilter::m_TrialPoints {std::vector< std::vector<unsigned int > >()}

private

Definition at line 172 of file sitkFastMarchingUpwindGradientImageFilter.h.

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

• sitkFastMarchingUpwindGradientImageFilter.h