#include <itkHalfToFullHermitianImageFilter.h>

Inheritance diagram for itk::HalfToFullHermitianImageFilter< TInputImage >:

Collaboration diagram for itk::HalfToFullHermitianImageFilter< TInputImage >:

Detailed Description

template<class TInputImage>
class itk::HalfToFullHermitianImageFilter< TInputImage >

Expands a half image produced from a real-to-complex discrete Fourier transform (DFT) to the full complex image.

The subclasses of RealToHalfHermitianForwardFFTImageFilter produce only the non-redundant half of the image resulting from a real-to-complex DFT. This filter takes the non-redundant half image and generates the full complex image that includes the redundant half. It requires additional information about the output image size, namely, whether the size in the first dimension of the output image is odd.

See Also: RealToHalfHermitianForwardFFTImageFilter

Definition at line 44 of file itkHalfToFullHermitianImageFilter.h.

Public Types
typedef SmartPointer< const Self >	ConstPointer

typedef InputImageType::IndexType	InputImageIndexType

typedef InputImageType::IndexValueType	InputImageIndexValueType

typedef InputImageType::PixelType	InputImagePixelType

typedef InputImageType::RegionType	InputImageRegionType

typedef InputImageType::SizeType	InputImageSizeType

typedef InputImageType::SizeValueType	InputImageSizeValueType

typedef TInputImage	InputImageType

typedef OutputImageType::IndexType	OutputImageIndexType

typedef OutputImageType::IndexValueType	OutputImageIndexValueType

typedef OutputImageType::PixelType	OutputImagePixelType

typedef OutputImageType::RegionType	OutputImageRegionType

typedef OutputImageType::SizeType	OutputImageSizeType

typedef OutputImageType::SizeValueType	OutputImageSizeValueType

typedef TInputImage	OutputImageType

typedef SmartPointer< Self >	Pointer

typedef HalfToFullHermitianImageFilter	Self

typedef ImageToImageFilter < TInputImage, TInputImage >	Superclass

Public Types inherited from itk::ImageToImageFilter< TInputImage, TInputImage >
typedef SmartPointer< const Self >	ConstPointer

typedef InputImageType::ConstPointer	InputImageConstPointer

typedef InputImageType::PixelType	InputImagePixelType

typedef InputImageType::Pointer	InputImagePointer

typedef InputImageType::RegionType	InputImageRegionType

typedef TInputImage	InputImageType

typedef Superclass::OutputImagePixelType	OutputImagePixelType

typedef Superclass::OutputImageRegionType	OutputImageRegionType

typedef SmartPointer< Self >	Pointer

typedef ImageToImageFilter	Self

typedef ImageSource< TInputImage >	Superclass

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

typedef Superclass::DataObjectIdentifierType	DataObjectIdentifierType

typedef DataObject::Pointer	DataObjectPointer

typedef Superclass::DataObjectPointerArraySizeType	DataObjectPointerArraySizeType

typedef OutputImageType::PixelType	OutputImagePixelType

typedef OutputImageType::Pointer	OutputImagePointer

typedef OutputImageType::RegionType	OutputImageRegionType

typedef TInputImage	OutputImageType

typedef SmartPointer< Self >	Pointer

typedef ImageSource	Self

typedef ProcessObject	Superclass

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

typedef DataObject::DataObjectIdentifierType	DataObjectIdentifierType

typedef DataObject::Pointer	DataObjectPointer

typedef std::vector < DataObjectPointer >	DataObjectPointerArray

typedef DataObjectPointerArray::size_type	DataObjectPointerArraySizeType

typedef std::vector < DataObjectIdentifierType >	NameArray

typedef SmartPointer< Self >	Pointer

typedef ProcessObject	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
virtual ::itk::LightObject::Pointer	CreateAnother (void) const

virtual const char *	GetNameOfClass () const


void	SetActualXDimensionIsOdd (bool isOdd)

void	SetActualXDimensionIsOddOn ()

void	SetActualXDimensionIsOddOff ()

bool	GetActualXDimensionIsOdd ()

Public Member Functions inherited from itk::ImageToImageFilter< TInputImage, TInputImage >
const InputImageType *	GetInput (void) const

const InputImageType *	GetInput (unsigned int idx) const

virtual void	PopBackInput ()

virtual void	PopFrontInput ()

virtual void	PushBackInput (const InputImageType *image)

virtual void	PushFrontInput (const InputImageType *image)

virtual void	SetInput (const InputImageType *image)

virtual void	SetInput (unsigned int, const TInputImage *image)

virtual void	SetCoordinateTolerance (double _arg)

virtual double	GetCoordinateTolerance () const

virtual void	SetDirectionTolerance (double _arg)

virtual double	GetDirectionTolerance () const

Public Member Functions inherited from itk::ImageSource< TInputImage >
OutputImageType *	GetOutput (unsigned int idx)

virtual void	GraftNthOutput (unsigned int idx, DataObject *output)

virtual void	GraftOutput (DataObject *output)

virtual void	GraftOutput (const DataObjectIdentifierType &key, DataObject *output)

OutputImageType *	GetOutput (void)

const OutputImageType *	GetOutput (void) const

virtual ProcessObject::DataObjectPointer	MakeOutput (ProcessObject::DataObjectPointerArraySizeType idx)

Public Member Functions inherited from itk::ProcessObject
virtual void	AbortGenerateDataOff ()

virtual void	AbortGenerateDataOn ()

virtual void	EnlargeOutputRequestedRegion (DataObject *)

virtual const bool &	GetAbortGenerateData ()

NameArray	GetInputNames () const

MultiThreader *	GetMultiThreader () const

DataObjectPointerArraySizeType	GetNumberOfIndexedInputs () const

DataObjectPointerArraySizeType	GetNumberOfInputs () const

DataObjectPointerArraySizeType	GetNumberOfOutputs () const

virtual DataObjectPointerArraySizeType	GetNumberOfValidRequiredInputs () const

NameArray	GetOutputNames () const

virtual const float &	GetProgress ()

NameArray	GetRequiredInputNames () const

bool	HasInput (const DataObjectIdentifierType &key) const

bool	HasOutput (const DataObjectIdentifierType &key) const

virtual DataObjectPointer	MakeOutput (const DataObjectIdentifierType &)

virtual void	PrepareOutputs ()

virtual void	PropagateRequestedRegion (DataObject *output)

virtual void	ResetPipeline ()

virtual void	SetAbortGenerateData (bool _arg)

virtual void	SetProgress (float _arg)

virtual void	Update ()

virtual void	UpdateLargestPossibleRegion ()

virtual void	UpdateOutputData (DataObject *output)

virtual void	UpdateOutputInformation ()

void	UpdateProgress (float amount)

DataObjectPointerArray	GetInputs ()

DataObjectPointerArray	GetOutputs ()

DataObjectPointerArray	GetIndexedInputs ()

DataObjectPointerArray	GetIndexedOutputs ()

DataObjectPointerArraySizeType	GetNumberOfIndexedOutputs () const

virtual void	SetReleaseDataFlag (bool flag)

virtual bool	GetReleaseDataFlag () const

void	ReleaseDataFlagOn ()

void	ReleaseDataFlagOff ()

virtual void	SetReleaseDataBeforeUpdateFlag (bool _arg)

virtual const bool &	GetReleaseDataBeforeUpdateFlag ()

virtual void	ReleaseDataBeforeUpdateFlagOn ()

virtual void	ReleaseDataBeforeUpdateFlagOff ()

virtual void	SetNumberOfThreads (ThreadIdType _arg)

virtual const ThreadIdType &	GetNumberOfThreads ()

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 (void)

const MetaDataDictionary &	GetMetaDataDictionary (void) 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

void	RemoveAllObservers ()

void	RemoveObserver (unsigned long tag)

void	SetDebug (bool debugFlag) const

void	SetMetaDataDictionary (const MetaDataDictionary &rhs)

virtual void	SetReferenceCount (int)

virtual void	UnRegister () 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 Attributes
static const unsigned int	ImageDimension = TInputImage::ImageDimension

Static Public Attributes inherited from itk::ImageToImageFilter< TInputImage, TInputImage >
static const unsigned int	InputImageDimension

static const unsigned int	OutputImageDimension

Static Public Attributes inherited from itk::ImageSource< TInputImage >
static const unsigned int	OutputImageDimension

Protected Member Functions
virtual void	GenerateInputRequestedRegion ()

virtual void	GenerateOutputInformation ()

	HalfToFullHermitianImageFilter ()

void	ThreadedGenerateData (const OutputImageRegionType &outputRegionForThread, ThreadIdType threadId)

	~HalfToFullHermitianImageFilter ()

Protected Member Functions inherited from itk::ImageToImageFilter< TInputImage, TInputImage >
virtual void	CallCopyInputRegionToOutputRegion (OutputImageRegionType &destRegion, const InputImageRegionType &srcRegion)

virtual void	CallCopyOutputRegionToInputRegion (InputImageRegionType &destRegion, const OutputImageRegionType &srcRegion)

	ImageToImageFilter ()

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

virtual void	VerifyInputInformation ()

	~ImageToImageFilter ()

void	PushBackInput (const DataObject *input)

void	PushFrontInput (const DataObject *input)

Protected Member Functions inherited from itk::ImageSource< TInputImage >
virtual void	AfterThreadedGenerateData ()

virtual void	AllocateOutputs ()

virtual void	BeforeThreadedGenerateData ()

virtual void	GenerateData ()

virtual const ImageRegionSplitterBase *	GetImageRegionSplitter (void) const

	ImageSource ()

virtual unsigned int	SplitRequestedRegion (unsigned int i, unsigned int num, OutputImageRegionType &splitRegion)

virtual	~ImageSource ()

Protected Member Functions inherited from itk::ProcessObject
virtual void	AddInput (DataObject *input)

virtual void	AddOutput (DataObject *output)

virtual void	CacheInputReleaseDataFlags ()

virtual void	GenerateOutputRequestedRegion (DataObject *output)

virtual const DataObjectPointerArraySizeType &	GetNumberOfRequiredOutputs ()

bool	IsIndexedInputName (const DataObjectIdentifierType &) const

bool	IsIndexedOutputName (const DataObjectIdentifierType &) const

	itkLegacyMacro (virtual void RemoveOutput(DataObject *output))

	itkLegacyMacro (void SetNumberOfOutputs(DataObjectPointerArraySizeType num))

	itkLegacyMacro (virtual void RemoveInput(DataObject *input))

	itkLegacyMacro (void SetNumberOfInputs(DataObjectPointerArraySizeType num))

DataObjectPointerArraySizeType	MakeIndexFromInputName (const DataObjectIdentifierType &name) const

DataObjectPointerArraySizeType	MakeIndexFromOutputName (const DataObjectIdentifierType &name) const

DataObjectIdentifierType	MakeNameFromInputIndex (DataObjectPointerArraySizeType idx) const

DataObjectIdentifierType	MakeNameFromOutputIndex (DataObjectPointerArraySizeType idx) const

	ProcessObject ()

virtual void	PropagateResetPipeline ()

virtual void	ReleaseInputs ()

virtual void	RemoveInput (const DataObjectIdentifierType &key)

virtual void	RemoveInput (DataObjectPointerArraySizeType)

virtual void	RemoveOutput (const DataObjectIdentifierType &key)

virtual void	RemoveOutput (DataObjectPointerArraySizeType idx)

virtual void	RestoreInputReleaseDataFlags ()

virtual void	SetInput (const DataObjectIdentifierType &key, DataObject *input)

virtual void	SetNthInput (DataObjectPointerArraySizeType num, DataObject *input)

virtual void	SetNthOutput (DataObjectPointerArraySizeType num, DataObject *output)

void	SetNumberOfIndexedInputs (DataObjectPointerArraySizeType num)

void	SetNumberOfIndexedOutputs (DataObjectPointerArraySizeType num)

virtual void	SetNumberOfRequiredOutputs (DataObjectPointerArraySizeType _arg)

virtual void	SetOutput (const DataObjectIdentifierType &key, DataObject *output)

virtual void	SetPrimaryInput (DataObject *input)

virtual void	SetPrimaryOutput (DataObject *output)

virtual void	VerifyPreconditions ()

	~ProcessObject ()

DataObject *	GetInput (const DataObjectIdentifierType &key)

const DataObject *	GetInput (const DataObjectIdentifierType &key) const

DataObject *	GetInput (DataObjectPointerArraySizeType idx)

const DataObject *	GetInput (DataObjectPointerArraySizeType idx) const

DataObject *	GetPrimaryInput ()

const DataObject *	GetPrimaryInput () const

virtual void	SetPrimaryInputName (const DataObjectIdentifierType &key)

virtual const char *	GetPrimaryInputName (void) const

virtual void	SetNumberOfRequiredInputs (DataObjectPointerArraySizeType)

virtual const DataObjectPointerArraySizeType &	GetNumberOfRequiredInputs ()

bool	AddRequiredInputName (const DataObjectIdentifierType &)

bool	AddRequiredInputName (const DataObjectIdentifierType &, DataObjectPointerArraySizeType idx)

bool	RemoveRequiredInputName (const DataObjectIdentifierType &)

bool	IsRequiredInputName (const DataObjectIdentifierType &) const

void	SetRequiredInputNames (const NameArray &)

DataObject *	GetOutput (const DataObjectIdentifierType &key)

const DataObject *	GetOutput (const DataObjectIdentifierType &key) const

virtual void	SetPrimaryOutputName (const DataObjectIdentifierType &key)

virtual const char *	GetPrimaryOutputName (void) const

DataObject *	GetOutput (DataObjectPointerArraySizeType idx)

const DataObject *	GetOutput (DataObjectPointerArraySizeType idx) const

DataObject *	GetPrimaryOutput ()

const DataObject *	GetPrimaryOutput () const

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

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

virtual void	SetTimeStamp (const TimeStamp &time)

virtual	~Object ()

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 Member Functions
	HalfToFullHermitianImageFilter (const Self &)

void	operator= (const Self &)

Private Attributes
bool	m_ActualXDimensionIsOdd

Additional Inherited Members
Protected Types inherited from itk::ImageToImageFilter< TInputImage, TInputImage >
typedef ImageToImageFilterDetail::ImageRegionCopier < itkGetStaticConstMacro(OutputImageDimension), itkGetStaticConstMacro(InputImageDimension) >	InputToOutputRegionCopierType

typedef ImageToImageFilterDetail::ImageRegionCopier < itkGetStaticConstMacro(InputImageDimension), itkGetStaticConstMacro(OutputImageDimension) >	OutputToInputRegionCopierType

Static Protected Member Functions inherited from itk::ImageSource< TInputImage >
static const ImageRegionSplitterBase *	GetGlobalDefaultSplitter ()

static ITK_THREAD_RETURN_TYPE	ThreaderCallback (void *arg)

Protected Attributes inherited from itk::ProcessObject
TimeStamp	m_OutputInformationMTime

bool	m_Updating

Member Typedef Documentation

template<class TInputImage >

typedef SmartPointer< const Self > itk::HalfToFullHermitianImageFilter< TInputImage >::ConstPointer

Definition at line 67 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

typedef InputImageType::IndexType itk::HalfToFullHermitianImageFilter< TInputImage >::InputImageIndexType

Definition at line 51 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

typedef InputImageType::IndexValueType itk::HalfToFullHermitianImageFilter< TInputImage >::InputImageIndexValueType

Definition at line 52 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

typedef InputImageType::PixelType itk::HalfToFullHermitianImageFilter< TInputImage >::InputImagePixelType

Definition at line 50 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

typedef InputImageType::RegionType itk::HalfToFullHermitianImageFilter< TInputImage >::InputImageRegionType

Definition at line 55 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

typedef InputImageType::SizeType itk::HalfToFullHermitianImageFilter< TInputImage >::InputImageSizeType

Definition at line 53 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

typedef InputImageType::SizeValueType itk::HalfToFullHermitianImageFilter< TInputImage >::InputImageSizeValueType

Definition at line 54 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

typedef TInputImage itk::HalfToFullHermitianImageFilter< TInputImage >::InputImageType

Standard class typedefs.

Definition at line 49 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

typedef OutputImageType::IndexType itk::HalfToFullHermitianImageFilter< TInputImage >::OutputImageIndexType

Definition at line 58 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

typedef OutputImageType::IndexValueType itk::HalfToFullHermitianImageFilter< TInputImage >::OutputImageIndexValueType

Definition at line 59 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

typedef OutputImageType::PixelType itk::HalfToFullHermitianImageFilter< TInputImage >::OutputImagePixelType

Definition at line 57 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

typedef OutputImageType::RegionType itk::HalfToFullHermitianImageFilter< TInputImage >::OutputImageRegionType

Definition at line 62 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

typedef OutputImageType::SizeType itk::HalfToFullHermitianImageFilter< TInputImage >::OutputImageSizeType

Definition at line 60 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

typedef OutputImageType::SizeValueType itk::HalfToFullHermitianImageFilter< TInputImage >::OutputImageSizeValueType

Definition at line 61 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

typedef TInputImage itk::HalfToFullHermitianImageFilter< TInputImage >::OutputImageType

Definition at line 56 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

typedef SmartPointer< Self > itk::HalfToFullHermitianImageFilter< TInputImage >::Pointer

Definition at line 66 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

typedef HalfToFullHermitianImageFilter itk::HalfToFullHermitianImageFilter< TInputImage >::Self

Definition at line 64 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

typedef ImageToImageFilter< TInputImage, TInputImage > itk::HalfToFullHermitianImageFilter< TInputImage >::Superclass

Definition at line 65 of file itkHalfToFullHermitianImageFilter.h.

Constructor & Destructor Documentation

template<class TInputImage >

itk::HalfToFullHermitianImageFilter< TInputImage >::HalfToFullHermitianImageFilter ( )

inlineprotected

Definition at line 100 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

itk::HalfToFullHermitianImageFilter< TInputImage >::~HalfToFullHermitianImageFilter ( )

inlineprotected

Definition at line 101 of file itkHalfToFullHermitianImageFilter.h.

template<class TInputImage >

itk::HalfToFullHermitianImageFilter< TInputImage >::HalfToFullHermitianImageFilter ( const Self & )

private

Member Function Documentation

template<class TInputImage >

virtual::itk::LightObject::Pointer itk::HalfToFullHermitianImageFilter< TInputImage >::CreateAnother ( void ) const

virtual

Create an object from an instance, potentially deferring to a factory. This method allows you to create an instance of an object that is exactly the same type as the referring object. This is useful in cases where an object has been cast back to a base class.

Reimplemented from itk::Object.

template<class TInputImage >

virtual void itk::HalfToFullHermitianImageFilter< TInputImage >::GenerateInputRequestedRegion ( )

protectedvirtual

This class requires the entire input.

Reimplemented from itk::ImageToImageFilter< TInputImage, TInputImage >.

template<class TInputImage >

virtual void itk::HalfToFullHermitianImageFilter< TInputImage >::GenerateOutputInformation ( )

protectedvirtual

The output is a different size from the input.

Reimplemented from itk::ProcessObject.

template<class TInputImage >

bool itk::HalfToFullHermitianImageFilter< TInputImage >::GetActualXDimensionIsOdd ( )

inline

Was the original truncated dimension size in the x-dimension odd?

Definition at line 93 of file itkHalfToFullHermitianImageFilter.h.

References itk::HalfToFullHermitianImageFilter< TInputImage >::m_ActualXDimensionIsOdd.

template<class TInputImage >

virtual const char* itk::HalfToFullHermitianImageFilter< TInputImage >::GetNameOfClass ( ) const

virtual

Run-time type information (and related methods).

Reimplemented from itk::ImageToImageFilter< TInputImage, TInputImage >.

template<class TInputImage >

static Pointer itk::HalfToFullHermitianImageFilter< TInputImage >::New ( )

static

Method for creation through the object factory.

template<class TInputImage >

void itk::HalfToFullHermitianImageFilter< TInputImage >::operator= ( const Self & )

private

template<class TInputImage >

void itk::HalfToFullHermitianImageFilter< TInputImage >::SetActualXDimensionIsOdd ( bool isOdd )

inline

Was the original truncated dimension size in the x-dimension odd?

Definition at line 81 of file itkHalfToFullHermitianImageFilter.h.

References itk::HalfToFullHermitianImageFilter< TInputImage >::m_ActualXDimensionIsOdd.

Referenced by itk::HalfToFullHermitianImageFilter< TInputImage >::SetActualXDimensionIsOddOff(), and itk::HalfToFullHermitianImageFilter< TInputImage >::SetActualXDimensionIsOddOn().

template<class TInputImage >

void itk::HalfToFullHermitianImageFilter< TInputImage >::SetActualXDimensionIsOddOff ( )

inline

Was the original truncated dimension size in the x-dimension odd?

Definition at line 89 of file itkHalfToFullHermitianImageFilter.h.

References itk::HalfToFullHermitianImageFilter< TInputImage >::SetActualXDimensionIsOdd().

template<class TInputImage >

void itk::HalfToFullHermitianImageFilter< TInputImage >::SetActualXDimensionIsOddOn ( )

inline

Was the original truncated dimension size in the x-dimension odd?

Definition at line 85 of file itkHalfToFullHermitianImageFilter.h.

References itk::HalfToFullHermitianImageFilter< TInputImage >::SetActualXDimensionIsOdd().

template<class TInputImage >

void itk::HalfToFullHermitianImageFilter< TInputImage >::ThreadedGenerateData	(	const OutputImageRegionType &	outputRegionForThread,
		ThreadIdType	threadId
	)

protectedvirtual

If an imaging filter can be implemented as a multithreaded algorithm, the filter will provide an implementation of ThreadedGenerateData(). This superclass will automatically split the output image into a number of pieces, spawn multiple threads, and call ThreadedGenerateData() in each thread. Prior to spawning threads, the BeforeThreadedGenerateData() method is called. After all the threads have completed, the AfterThreadedGenerateData() method is called. If an image processing filter cannot support threading, that filter should provide an implementation of the GenerateData() method instead of providing an implementation of ThreadedGenerateData(). If a filter provides a GenerateData() method as its implementation, then the filter is responsible for allocating the output data. If a filter provides a ThreadedGenerateData() method as its implementation, then the output memory will allocated automatically by this superclass. The ThreadedGenerateData() method should only produce the output specified by "outputThreadRegion" parameter. ThreadedGenerateData() cannot write to any other portion of the output image (as this is responsibility of a different thread).