Virtual class that defines a common interface to all neighborhood operator subtypes. More...

#include <itkNeighborhoodOperator.h>

Inheritance diagram for itk::NeighborhoodOperator< TPixel, VDimension, TAllocator >:

Collaboration diagram for itk::NeighborhoodOperator< TPixel, VDimension, TAllocator >:

Public Types
typedef NumericTraits< TPixel > ::RealType	PixelRealType
typedef TPixel	PixelType
typedef NeighborhoodOperator	Self
typedef Superclass::SizeType	SizeType
typedef SliceIterator< TPixel, Self >	SliceIteratorType
typedef Neighborhood< TPixel, VDimension, TAllocator >	Superclass
Public Member Functions
virtual void	CreateDirectional ()
virtual void	CreateToRadius (const SizeType &)
virtual void	CreateToRadius (const SizeValueType)
virtual void	FlipAxes ()
unsigned long	GetDirection () const
	NeighborhoodOperator ()
	NeighborhoodOperator (const Self &orig)
void	ScaleCoefficients (PixelRealType)
void	SetDirection (const unsigned long &direction)

Self &	operator= (const Self &orig)

virtual void	PrintSelf (std::ostream &os, Indent i) const
Protected Types
typedef std::vector< double >	CoefficientVector
Protected Member Functions
virtual void	Fill (const CoefficientVector &)=0
virtual void	FillCenteredDirectional (const CoefficientVector &)
virtual CoefficientVector	GenerateCoefficients ()=0

void	InitializeToZero ()
Private Attributes
unsigned long	m_Direction

Detailed Description

template<class TPixel, unsigned int VDimension, class TAllocator = NeighborhoodAllocator< TPixel >>
class itk::NeighborhoodOperator< TPixel, VDimension, TAllocator >

Virtual class that defines a common interface to all neighborhood operator subtypes.

A NeighborhoodOperator is a set of pixel values that can be applied to a Neighborhood to perform a user-defined operation (i.e. convolution kernel, morphological structuring element). A NeighborhoodOperator is itself a specialized Neighborhood, with functionality to generate its coefficients according to user-defined parameters. Because the operator is a subclass of Neighborhood, it is a valid operand in any of the operations defined on the Neighborhood object (convolution, inner product, etc.).

NeighborhoodOperator is a pure virtual object that must be subclassed to be used. A user's subclass must implement two methods:

(1) GenerateCoefficients -- the algorithm that computes the scalar coefficients of the operator.

(2) Fill -- the algorithm that places the scalar coefficients into the memory buffer of the operator (arranges them spatially in the neighborhood).

NeighborhoodOperator supports the concept of a "directional operator." A directional operator is defined in this context to be an operator that is applied along a single dimension. Examples of this type of operator are directional derivatives and the individual, directional components of separable processes such as Gaussian smoothing.

How a NeighborhoodOperator is applied to data is up to the user who defines it. One possible use of an operator would be to take its inner product with a neighborhood of values to produce a scalar result. This process effects convolution when applied to successive neighborhoods across a region of interest in an image.

Definition at line 66 of file itkNeighborhoodOperator.h.