itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType > Class Template Reference

#include <itkCentralDifferenceImageFunction.h>

Inheritance diagram for itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >:

Collaboration diagram for itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >:

Detailed Description

template<class TInputImage, class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>
class itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >

Calculate the derivative by central differencing.

This class is templated over the input image type, the coordinate representation type (e.g. float or double), and the output derivative type.

This class supports both scalar and vector pixel types for the input image, including VectorImage types.

For vector-pixel image types, the TOutputType template parameter must be set to a vector of appropriate size, to accomadate a result for each pixel component in each dimension. The output is packed by pixel component, i.e.

[C0D0, C0D1, ..., C0DN, C1D0, ...]

where C = pixel component, and D = image dimension.

The output type can be, for example:

CovariantVector<double, numberOfPixelComponents * ImageDimension> 

or

Matrix<double, numberOfPixelComponents, ImageDimension> 

Possible improvements:

1) speed performance: The template-specialization of the Evaluate*() methods (needed to support vector-pixel types) incur a performance penalty for the scalar-pixel case, when compared with previous scalar-only versions of the code. On MacOS (2.4GHz Core 2 Duo, gcc 4.2) the penalty is 0.5-2%, depending on the method. To recover this loss, the specialization of the methods would have to be done such that a nested subroutine need not be called, ie the specialization is performed on the Evaluate* methods directly. At the moment is seems this can't be done without requiring a template parameter on the methods.

2) the use of Neighborhood operators may improve efficiency.

Definition at line 80 of file itkCentralDifferenceImageFunction.h.

Classes
struct	OutputTypeSpecializationStructType

Public Types
typedef SmartPointer< const Self >	ConstPointer
typedef Superclass::ContinuousIndexType	ContinuousIndexType
typedef Superclass::IndexType	IndexType
typedef TInputImage	InputImageType
typedef DefaultConvertPixelTraits < InputPixelType >	InputPixelConvertType
typedef InputImageType::PixelType	InputPixelType
typedef InterpolatorType::Pointer	InterpolatorPointer
typedef InterpolateImageFunction < TInputImage, TCoordRep >	InterpolatorType
typedef DefaultConvertPixelTraits < OutputType >	OutputConvertType
typedef Superclass::OutputType	OutputType
typedef OutputConvertType::ComponentType	OutputValueType
typedef SmartPointer< Self >	Pointer
typedef Superclass::PointType	PointType
typedef CovariantVector < OutputValueType, itkGetStaticConstMacro(ImageDimension) >	ScalarDerivativeType
typedef CentralDifferenceImageFunction	Self
typedef TInputImage::SpacingType	SpacingType
typedef ImageFunction < TInputImage, TOutputType, TCoordRep >	Superclass
Public Types inherited from itk::ImageFunction< TInputImage, TOutputType, TCoordRep >
typedef SmartPointer< const Self >	ConstPointer
typedef ContinuousIndex < TCoordRep, itkGetStaticConstMacro(ImageDimension) >	ContinuousIndexType
typedef TCoordRep	CoordRepType
typedef InputImageType::IndexType	IndexType
typedef InputImageType::IndexValueType	IndexValueType
typedef InputImageType::ConstPointer	InputImageConstPointer
typedef TInputImage	InputImageType
typedef InputImageType::PixelType	InputPixelType
typedef TOutputType	OutputType
typedef SmartPointer< Self >	Pointer
typedef Point< TCoordRep, itkGetStaticConstMacro(ImageDimension) >	PointType
typedef ImageFunction	Self
typedef FunctionBase< Point < TCoordRep, itkGetStaticConstMacro(ImageDimension) > , TOutputType >	Superclass
Public Types inherited from itk::FunctionBase< Point< TCoordRep, TInputImage::ImageDimension >, TOutputType >
typedef SmartPointer< const Self >	ConstPointer
typedef Point< TCoordRep, TInputImage::ImageDimension >	InputType
typedef TOutputType	OutputType
typedef SmartPointer< Self >	Pointer
typedef FunctionBase	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 OutputType	Evaluate (const PointType &point) const
virtual OutputType	EvaluateAtContinuousIndex (const ContinuousIndexType &cindex) const
virtual OutputType	EvaluateAtIndex (const IndexType &index) const
virtual const InterpolatorType *	GetInterpolator ()
virtual const char *	GetNameOfClass () const
virtual void	SetInputImage (const TInputImage *inputData)
virtual void	SetInterpolator (InterpolatorType *interpolator)
virtual void	SetUseImageDirection (bool _arg)
virtual bool	GetUseImageDirection () const
virtual void	UseImageDirectionOn ()
virtual void	UseImageDirectionOff ()
Public Member Functions inherited from itk::ImageFunction< TInputImage, TOutputType, TCoordRep >
void	ConvertContinuousIndexToNearestIndex (const ContinuousIndexType &cindex, IndexType &index) const
void	ConvertPointToContinuousIndex (const PointType &point, ContinuousIndexType &cindex) const
void	ConvertPointToNearestIndex (const PointType &point, IndexType &index) const
virtual TOutputType	Evaluate (const PointType &point) const =0
virtual TOutputType	EvaluateAtContinuousIndex (const ContinuousIndexType &index) const =0
virtual TOutputType	EvaluateAtIndex (const IndexType &index) const =0
virtual const ContinuousIndexType &	GetEndContinuousIndex ()
virtual const IndexType &	GetEndIndex ()
const InputImageType *	GetInputImage () const
virtual const ContinuousIndexType &	GetStartContinuousIndex ()
virtual const IndexType &	GetStartIndex ()
virtual bool	IsInsideBuffer (const IndexType &index) const
virtual bool	IsInsideBuffer (const ContinuousIndexType &index) const
virtual bool	IsInsideBuffer (const PointType &point) const

Static Public Member Functions
static Pointer	New ()

Static Public Attributes
static const unsigned int	ImageDimension = TInputImage::ImageDimension
Static Public Attributes inherited from itk::ImageFunction< TInputImage, TOutputType, TCoordRep >
static const unsigned int	ImageDimension

Protected Member Functions
	CentralDifferenceImageFunction ()
void	PrintSelf (std::ostream &os, Indent indent) const
	~CentralDifferenceImageFunction ()
Protected Member Functions inherited from itk::ImageFunction< TInputImage, TOutputType, TCoordRep >
	ImageFunction ()
void	PrintSelf (std::ostream &os, Indent indent) const
	~ImageFunction ()
Protected Member Functions inherited from itk::FunctionBase< Point< TCoordRep, TInputImage::ImageDimension >, TOutputType >
	FunctionBase ()
	~FunctionBase ()
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
	CentralDifferenceImageFunction (const Self &)
void	operator= (const Self &)
template<class Type >
void	EvaluateAtIndexSpecialized (const IndexType &index, OutputType &derivative, OutputTypeSpecializationStructType< OutputType >) const
template<class Type >
void	EvaluateAtIndexSpecialized (const IndexType &index, OutputType &derivative, OutputTypeSpecializationStructType< Type >) const
template<class Type >
void	EvaluateAtContinuousIndexSpecialized (const ContinuousIndexType &index, OutputType &derivative, OutputTypeSpecializationStructType< OutputType >) const
template<class Type >
void	EvaluateAtContinuousIndexSpecialized (const ContinuousIndexType &index, OutputType &derivative, OutputTypeSpecializationStructType< Type >) const
template<class Type >
void	EvaluateSpecialized (const PointType &point, OutputType &derivative, OutputTypeSpecializationStructType< OutputType >) const
template<class Type >
void	EvaluateSpecialized (const PointType &point, OutputType &derivative, OutputTypeSpecializationStructType< Type >) const

Private Attributes
InterpolatorPointer	m_Interpolator
bool	m_UseImageDirection

Additional Inherited Members
Protected Types inherited from itk::LightObject
typedef int	InternalReferenceCountType
Protected Attributes inherited from itk::ImageFunction< TInputImage, TOutputType, TCoordRep >
ContinuousIndexType	m_EndContinuousIndex
IndexType	m_EndIndex
InputImageConstPointer	m_Image
ContinuousIndexType	m_StartContinuousIndex
IndexType	m_StartIndex

Member Typedef Documentation

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

typedef SmartPointer< const Self > itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::ConstPointer

Definition at line 97 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

typedef Superclass::ContinuousIndexType itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::ContinuousIndexType

ContinuousIndex typedef support.

Definition at line 130 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

typedef Superclass::IndexType itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::IndexType

Index typedef support.

Definition at line 127 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

typedef TInputImage itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::InputImageType

InputImageType typedef support.

Definition at line 103 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

typedef DefaultConvertPixelTraits< InputPixelType > itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::InputPixelConvertType

InputPixelConvert typedef support

Definition at line 112 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

typedef InputImageType::PixelType itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::InputPixelType

InputPixelType typedef support

Definition at line 109 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

typedef InterpolatorType::Pointer itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::InterpolatorPointer

Definition at line 140 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

typedef InterpolateImageFunction< TInputImage, TCoordRep > itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::InterpolatorType

Interpolator typedef support.

Definition at line 139 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

typedef DefaultConvertPixelTraits<OutputType> itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::OutputConvertType

Output convert typedef support

Definition at line 118 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

typedef Superclass::OutputType itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::OutputType

OutputType typdef support.

Definition at line 115 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

typedef OutputConvertType::ComponentType itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::OutputValueType

Output value typedef support

Definition at line 121 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

typedef SmartPointer< Self > itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::Pointer

Definition at line 96 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

typedef Superclass::PointType itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::PointType

Point typedef support.

Definition at line 133 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

typedef CovariantVector<OutputValueType, itkGetStaticConstMacro(ImageDimension) > itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::ScalarDerivativeType

Scalar derivative typedef support

Definition at line 124 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

typedef CentralDifferenceImageFunction itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::Self

Standard class typedefs.

Definition at line 92 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

typedef TInputImage::SpacingType itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::SpacingType

Spacing typedef support.

Definition at line 136 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

typedef ImageFunction< TInputImage, TOutputType, TCoordRep > itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::Superclass

Definition at line 95 of file itkCentralDifferenceImageFunction.h.

Constructor & Destructor Documentation

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::CentralDifferenceImageFunction ( )

protected

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::~CentralDifferenceImageFunction ( )

inlineprotected

Definition at line 213 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::CentralDifferenceImageFunction ( const Self &  )

private

Member Function Documentation

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

virtual::itk::LightObject::Pointer itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::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 , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

virtual OutputType itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::Evaluate ( const PointType &  point ) const

virtual

Evalulate the image derivative by central differencing at non-integer point.

No bounds checking is done. The point is assumed to lie within the image buffer. If not, 0 is returned for the derivative without any error return, because of bounds-checking performed on the neighboring points.

If point lies on a boundary in a given dimension, 0 is returned for that dimension. Note that points are centered on the voxel.

ImageFunction::IsInsideBuffer() can be used to check bounds before calling the method.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

virtual OutputType itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::EvaluateAtContinuousIndex ( const ContinuousIndexType &  cindex ) const

virtual

Evalulate the image derivative by central differencing at non-integer index.

No bounds checking is done. The point is assumed to lie within the image buffer.

If cindex lies on a boundary in a given dimension, 0 is returned for that dimension.

ImageFunction::IsInsideBuffer() can be used to check bounds before calling the method.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

template<class Type >

void itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::EvaluateAtContinuousIndexSpecialized ( const ContinuousIndexType &  index, OutputType &  derivative, OutputTypeSpecializationStructType< OutputType >    ) const

inlineprivate

Specialized versions of EvaluteAtContinuousIndex() method to handle scalar or vector pixel types.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

template<class Type >

void itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::EvaluateAtContinuousIndexSpecialized ( const ContinuousIndexType &  index, OutputType &  derivative, OutputTypeSpecializationStructType< Type >    ) const

inlineprivate

Specialized versions of EvaluteAtContinuousIndex() method to handle scalar or vector pixel types.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

virtual OutputType itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::EvaluateAtIndex ( const IndexType &  index ) const

virtual

Evalulate the image derivative by central differencing at specified index.

No bounds checking is done. The point is assumed to lie within the image buffer.

If index lies on a boundary in a given dimension, 0 is returned for that dimension.

ImageFunction::IsInsideBuffer() can be used to check bounds before calling the method.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

template<class Type >

void itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::EvaluateAtIndexSpecialized ( const IndexType &  index, OutputType &  derivative, OutputTypeSpecializationStructType< OutputType >    ) const

inlineprivate

Specialized versions of EvaluteAtIndex() method to handle scalar or vector pixel types.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

template<class Type >

void itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::EvaluateAtIndexSpecialized ( const IndexType &  index, OutputType &  derivative, OutputTypeSpecializationStructType< Type >    ) const

inlineprivate

Specialized versions of EvaluteAtIndex() method to handle scalar or vector pixel types.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

template<class Type >

void itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::EvaluateSpecialized ( const PointType &  point, OutputType &  derivative, OutputTypeSpecializationStructType< OutputType >    ) const

private

Specialized versions of Evalute() method to handle scalar or vector pixel types.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

template<class Type >

void itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::EvaluateSpecialized ( const PointType &  point, OutputType &  derivative, OutputTypeSpecializationStructType< Type >    ) const

private

Specialized versions of Evalute() method to handle scalar or vector pixel types.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

virtual const InterpolatorType* itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::GetInterpolator ( )

virtual

Get the interpolator.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

virtual const char* itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::GetNameOfClass ( ) const

virtual

Run-time type information (and related methods).

Reimplemented from itk::ImageFunction< TInputImage, TOutputType, TCoordRep >.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

virtual bool itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::GetUseImageDirection ( ) const

virtual

The UseImageDirection flag determines whether image derivatives are computed with respect to the image grid or with respect to the physical space. When this flag is ON the derivatives are computed with respect to the coordinate system of physical space. The difference is whether we take into account the image Direction or not. For EvaluateAtIndex and EvaluateAtContinuousIndex, the flag ON will take into account the image direction and will result in an extra matrix multiplication compared to the amount of computation performed when the flag is OFF. For Evaluate, the opposite is true: the flag OFF will ignore the image direction and will result in an extra matrix multiplication compared to the amount of computation performed when the flag is ON. The default value of this flag is On.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

static Pointer itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::New ( )

static

Method for creation through the object factory.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

void itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::operator= ( const Self &  )

private

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

void itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::PrintSelf ( std::ostream &  os, Indent  indent  ) const

protectedvirtual

Methods invoked by Print() to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from itk::Object.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

virtual void itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::SetInputImage ( const TInputImage *  inputData )

virtual

Set the input image. This must be set by the user.

Reimplemented from itk::ImageFunction< TInputImage, TOutputType, TCoordRep >.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

virtual void itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::SetInterpolator ( InterpolatorType *  interpolator )

virtual

Set interpolator. The interpolator is used in the methods Evaluate and EvaluateAtContinuousIndex.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

virtual void itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::SetUseImageDirection ( bool  _arg )

virtual

The UseImageDirection flag determines whether image derivatives are computed with respect to the image grid or with respect to the physical space. When this flag is ON the derivatives are computed with respect to the coordinate system of physical space. The difference is whether we take into account the image Direction or not. For EvaluateAtIndex and EvaluateAtContinuousIndex, the flag ON will take into account the image direction and will result in an extra matrix multiplication compared to the amount of computation performed when the flag is OFF. For Evaluate, the opposite is true: the flag OFF will ignore the image direction and will result in an extra matrix multiplication compared to the amount of computation performed when the flag is ON. The default value of this flag is On.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

virtual void itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::UseImageDirectionOff ( )

virtual

The UseImageDirection flag determines whether image derivatives are computed with respect to the image grid or with respect to the physical space. When this flag is ON the derivatives are computed with respect to the coordinate system of physical space. The difference is whether we take into account the image Direction or not. For EvaluateAtIndex and EvaluateAtContinuousIndex, the flag ON will take into account the image direction and will result in an extra matrix multiplication compared to the amount of computation performed when the flag is OFF. For Evaluate, the opposite is true: the flag OFF will ignore the image direction and will result in an extra matrix multiplication compared to the amount of computation performed when the flag is ON. The default value of this flag is On.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

virtual void itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::UseImageDirectionOn ( )

virtual

The UseImageDirection flag determines whether image derivatives are computed with respect to the image grid or with respect to the physical space. When this flag is ON the derivatives are computed with respect to the coordinate system of physical space. The difference is whether we take into account the image Direction or not. For EvaluateAtIndex and EvaluateAtContinuousIndex, the flag ON will take into account the image direction and will result in an extra matrix multiplication compared to the amount of computation performed when the flag is OFF. For Evaluate, the opposite is true: the flag OFF will ignore the image direction and will result in an extra matrix multiplication compared to the amount of computation performed when the flag is ON. The default value of this flag is On.

Member Data Documentation

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

const unsigned int itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::ImageDimension = TInputImage::ImageDimension

static

Dimension underlying input image.

Definition at line 89 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

InterpolatorPointer itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::m_Interpolator

private

Definition at line 255 of file itkCentralDifferenceImageFunction.h.

template<class TInputImage , class TCoordRep = float, class TOutputType = CovariantVector<double, TInputImage::ImageDimension >>

bool itk::CentralDifferenceImageFunction< TInputImage, TCoordRep, TOutputType >::m_UseImageDirection

private

Definition at line 252 of file itkCentralDifferenceImageFunction.h.

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

• itkCentralDifferenceImageFunction.h