#include <itkConstantBoundaryCondition.h>

Detailed Description

template<typename TInputImage, typename TOutputImage = TInputImage>
class itk::ConstantBoundaryCondition< TInputImage, TOutputImage >

This boundary condition returns a constant value for out-of-bounds image pixels.

For example, invoking this function object with a constant value of zero (the default) on each out-of-bounds element of a 7x5 iterator that masks a region at an image corner (iterator is centered on the 2):

          * * * * * * *
          * * * * * * *
          * * 1 2 3 4 5  (where * denotes pixels that lie
          * * 3 3 5 5 6          outside of the image boundary)
          * * 4 4 6 7 8

would produce the following neighborhood of values:

          0 0 0 0 0 0 0
          0 0 0 0 0 0 0
          0 0 1 2 3 4 5
          0 0 3 3 5 5 6
          0 0 4 4 6 7 8

Note: If you are using an image with Array as the pixel type, you will need to set the constant explicitly with an array of the appropriate length. This is also true if your image type is a VectorImage.

See also: ImageBoundaryCondition

ITK Sphinx Examples:

<a href=
<a href=

Definition at line 68 of file itkConstantBoundaryCondition.h.

Inheritance diagram for itk::ConstantBoundaryCondition< TInputImage, TOutputImage >:

Collaboration diagram for itk::ConstantBoundaryCondition< TInputImage, TOutputImage >:

Public Types
using	Self = ConstantBoundaryCondition

using	Superclass = ImageBoundaryCondition< TInputImage, TOutputImage >

Public Types inherited from itk::ImageBoundaryCondition< TInputImage, TInputImage >
using	IndexType = Index< ImageDimension >

using	InputImageType = TInputImage

using	NeighborhoodAccessorFunctorType = typename TInputImage::NeighborhoodAccessorFunctorType

using	NeighborhoodType = Neighborhood< PixelPointerType, ImageDimension >

using	OffsetType = Offset< ImageDimension >

using	OutputImageType = TInputImage

using	OutputPixelType = typename TOutputImage::PixelType

using	PixelPointerType = typename TInputImage::InternalPixelType *

using	PixelType = typename TInputImage::PixelType

using	RegionType = ImageRegion< ImageDimension >

using	Self = ImageBoundaryCondition

using	SizeType = Size< ImageDimension >

Public Member Functions
	ConstantBoundaryCondition ()=default

const OutputPixelType &	GetConstant () const

RegionType	GetInputRequestedRegion (const RegionType &inputLargestPossibleRegion, const RegionType &outputRequestedRegion) const override

const char *	GetNameOfClass () const override

OutputPixelType	GetPixel (const IndexType &index, const TInputImage *image) const override

template<typename TPixel >
void	Initialize (const VariableLengthVector< TPixel > *)

OutputPixelType	operator() (const OffsetType &, const OffsetType &, const NeighborhoodType *) const override

OutputPixelType	operator() (const OffsetType &, const OffsetType &, const NeighborhoodType *, const NeighborhoodAccessorFunctorType &) const override

void	Print (std::ostream &os, Indent i=0) const override

bool	RequiresCompleteNeighborhood () override

void	SetConstant (const OutputPixelType &c)

Public Member Functions inherited from itk::ImageBoundaryCondition< TInputImage, TInputImage >
virtual RegionType	GetInputRequestedRegion (const RegionType &inputLargestPossibleRegion, const RegionType &) const

virtual const char *	GetNameOfClass () const

virtual OutputPixelType	GetPixel (const IndexType &index, const TInputImage *image) const=0

	ImageBoundaryCondition ()=default

virtual OutputPixelType	operator() (const OffsetType &point_index, const OffsetType &boundary_offset, const NeighborhoodType *data) const=0

virtual OutputPixelType	operator() (const OffsetType &point_index, const OffsetType &boundary_offset, const NeighborhoodType *data, const NeighborhoodAccessorFunctorType &neighborhoodAccessorFunctor) const=0

virtual void	Print (std::ostream &os, Indent i=0) const

virtual bool	RequiresCompleteNeighborhood ()

virtual	~ImageBoundaryCondition ()=default

Static Public Attributes
static constexpr unsigned int	ImageDimension = Superclass::ImageDimension

Static Public Attributes inherited from itk::ImageBoundaryCondition< TInputImage, TInputImage >
static constexpr unsigned int	ImageDimension

Private Attributes
OutputPixelType	m_Constant {}

Member Typedef Documentation

◆ Self

template<typename TInputImage , typename TOutputImage = TInputImage>

using itk::ConstantBoundaryCondition< TInputImage, TOutputImage >::Self = ConstantBoundaryCondition

Self & superclass type alias

Definition at line 72 of file itkConstantBoundaryCondition.h.

◆ Superclass

template<typename TInputImage , typename TOutputImage = TInputImage>

using itk::ConstantBoundaryCondition< TInputImage, TOutputImage >::Superclass = ImageBoundaryCondition<TInputImage, TOutputImage>

Definition at line 73 of file itkConstantBoundaryCondition.h.

Constructor & Destructor Documentation

◆ ConstantBoundaryCondition()

template<typename TInputImage , typename TOutputImage = TInputImage>

itk::ConstantBoundaryCondition< TInputImage, TOutputImage >::ConstantBoundaryCondition ( )

default

Default constructor.

Member Function Documentation

◆ GetConstant()

template<typename TInputImage , typename TOutputImage = TInputImage>

const OutputPixelType & itk::ConstantBoundaryCondition< TInputImage, TOutputImage >::GetConstant ( ) const

Get the value of the constant.

◆ GetInputRequestedRegion()

template<typename TInputImage , typename TOutputImage = TInputImage>

RegionType itk::ConstantBoundaryCondition< TInputImage, TOutputImage >::GetInputRequestedRegion	(	const RegionType &	inputLargestPossibleRegion,
		const RegionType &	outputRequestedRegion
	)		const

overridevirtual

Determines the necessary input region for the output region. For this boundary condition, only the intersection of the largest possible image region and the output requested region is needed.

Parameters

inputLargestPossibleRegion	Largest possible region of the input image.
outputRequestedRegion	The output requested region.

Returns: The necessary input region required to determine the pixel values in the outputRequestedRegion.

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

◆ GetNameOfClass()

template<typename TInputImage , typename TOutputImage = TInputImage>

const char * itk::ConstantBoundaryCondition< TInputImage, TOutputImage >::GetNameOfClass ( ) const

overridevirtual

See also: LightObject::GetNameOfClass()

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

◆ GetPixel()

template<typename TInputImage , typename TOutputImage = TInputImage>

OutputPixelType itk::ConstantBoundaryCondition< TInputImage, TOutputImage >::GetPixel	(	const IndexType &	index,
		const TInputImage *	image
	)		const

overridevirtual

Returns a value for a given pixel at an index. If the index is inside the bounds of the input image, then the pixel value is obtained from the input image. Otherwise, the constant value is returned.

Parameters

index	The index of the desired pixel.
image	The image from which pixel values should be determined.

Implements itk::ImageBoundaryCondition< TInputImage, TInputImage >.

◆ Initialize()

template<typename TInputImage , typename TOutputImage = TInputImage>

template<typename TPixel >

void itk::ConstantBoundaryCondition< TInputImage, TOutputImage >::Initialize ( const VariableLengthVector< TPixel > * )

Special version of initialize for images with pixel type VariableLengthVector.

◆ operator()() [1/2]

template<typename TInputImage , typename TOutputImage = TInputImage>

OutputPixelType itk::ConstantBoundaryCondition< TInputImage, TOutputImage >::operator()	(	const OffsetType &	,
		const OffsetType &	,
		const NeighborhoodType *
	)		const

overridevirtual

Computes and returns appropriate out-of-bounds values from neighborhood iterator data.

Implements itk::ImageBoundaryCondition< TInputImage, TInputImage >.

◆ operator()() [2/2]

template<typename TInputImage , typename TOutputImage = TInputImage>

OutputPixelType itk::ConstantBoundaryCondition< TInputImage, TOutputImage >::operator()	(	const OffsetType &	,
		const OffsetType &	,
		const NeighborhoodType *	,
		const NeighborhoodAccessorFunctorType &
	)		const

overridevirtual

Computes and returns the appropriate pixel value from neighborhood iterator data, using the functor.

Implements itk::ImageBoundaryCondition< TInputImage, TInputImage >.

◆ Print()

template<typename TInputImage , typename TOutputImage = TInputImage>

void itk::ConstantBoundaryCondition< TInputImage, TOutputImage >::Print	(	std::ostream &	os,
		Indent	i = `0`
	)		const

overridevirtual

Utility for printing the boundary condition.

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

◆ RequiresCompleteNeighborhood()

template<typename TInputImage , typename TOutputImage = TInputImage>

bool itk::ConstantBoundaryCondition< TInputImage, TOutputImage >::RequiresCompleteNeighborhood ( )

inlineoverridevirtual

Tell if the boundary condition can index to any location within the associated iterator's neighborhood or if it has some limited subset (such as none) that it relies upon.

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

Definition at line 131 of file itkConstantBoundaryCondition.h.