Iterator that walks a Bresenham line through an ND image. More...

#include <itkLineConstIterator.h>

Inheritance diagram for itk::LineConstIterator< TImage >:

Public Types
typedef TImage::AccessorType	AccessorType
typedef TImage	ImageType
typedef TImage::IndexType	IndexType
typedef TImage::IndexValueType	IndexValueType
typedef TImage::InternalPixelType	InternalPixelType
typedef TImage::OffsetType	OffsetType
typedef TImage::OffsetValueType	OffsetValueType
typedef TImage::PixelContainer	PixelContainer
typedef PixelContainer::Pointer	PixelContainerPointer
typedef TImage::PixelType	PixelType
typedef TImage::PointType	PointType
typedef TImage::RegionType	RegionType
typedef LineConstIterator	Self
typedef TImage::SizeType	SizeType
typedef TImage::SizeValueType	SizeValueType
typedef TImage::SpacingType	SpacingType
Public Member Functions
const PixelType &	Get (void) const
const IndexType	GetIndex ()
virtual const char *	GetNameOfClass () const
void	GoToBegin ()
bool	IsAtEnd ()
	LineConstIterator (const ImageType *imagePtr, const IndexType &firstIndex, const IndexType &lastIndex)
void	operator++ ()
Self &	operator= (const Self &it)
virtual	~LineConstIterator ()
Static Public Member Functions
static unsigned int	GetImageIteratorDimension ()
Static Public Attributes
static const unsigned int	ImageIteratorDimension = TImage::ImageDimension
Protected Attributes
IndexType	m_AccumulateError
IndexType	m_CurrentImageIndex
IndexType	m_EndIndex
ImageType::ConstWeakPointer	m_Image
IndexType	m_IncrementError
bool	m_IsAtEnd
IndexType	m_LastIndex
unsigned int	m_MainDirection
IndexType	m_MaximalError
IndexType	m_OverflowIncrement
IndexType	m_ReduceErrorAfterIncrement
RegionType	m_Region
IndexType	m_StartIndex

Detailed Description

template<class TImage>
class itk::LineConstIterator< TImage >

Iterator that walks a Bresenham line through an ND image.

LineConstIterator is an iterator that walks a Bresenham line through an image. The iterator is constructed similar to other image iterators except for instead of specifying a region to traverse, you specify two indices. The interval specified by the two indices is closed. So, a line iterator specified with the same start and end index will visit exactly one pixel.

 LineConstIterator<ImageType> it(image, I1, I2);
 while (!it.IsAtEnd())
 {
    // visits at least 1 pixel
 }

This class was contributed by Benjamin King, Experimentelle Radiologie, Medizinische Hochschule Hannover.

Definition at line 50 of file itkLineConstIterator.h.

Member Typedef Documentation

template<class TImage >

typedef TImage::AccessorType itk::LineConstIterator< TImage >::AccessorType

Accessor type that convert data between internal and external representations.

Reimplemented in itk::LineIterator< TImage >.

Definition at line 102 of file itkLineConstIterator.h.

template<class TImage >

typedef TImage itk::LineConstIterator< TImage >::ImageType

Image typedef support.

Reimplemented in itk::LineIterator< TImage >.

Definition at line 86 of file itkLineConstIterator.h.

template<class TImage >

typedef TImage::IndexType itk::LineConstIterator< TImage >::IndexType

Index typedef support.

Reimplemented in itk::LineIterator< TImage >.

Definition at line 65 of file itkLineConstIterator.h.

template<class TImage >

typedef TImage::IndexValueType itk::LineConstIterator< TImage >::IndexValueType

Reimplemented in itk::LineIterator< TImage >.

Definition at line 66 of file itkLineConstIterator.h.

template<class TImage >

typedef TImage::InternalPixelType itk::LineConstIterator< TImage >::InternalPixelType

Internal Pixel Type

Reimplemented in itk::LineIterator< TImage >.

Definition at line 95 of file itkLineConstIterator.h.

template<class TImage >

typedef TImage::OffsetType itk::LineConstIterator< TImage >::OffsetType

Offset typedef support.

Reimplemented in itk::LineIterator< TImage >.

Definition at line 69 of file itkLineConstIterator.h.

template<class TImage >

typedef TImage::OffsetValueType itk::LineConstIterator< TImage >::OffsetValueType

Reimplemented in itk::LineIterator< TImage >.

Definition at line 70 of file itkLineConstIterator.h.

template<class TImage >

typedef TImage::PixelContainer itk::LineConstIterator< TImage >::PixelContainer

PixelContainer typedef support. Used to refer to the container for the pixel data. While this was already typdef'ed in the superclass it needs to be redone here for this subclass to compile properly with gcc.

Reimplemented in itk::LineIterator< TImage >.

Definition at line 91 of file itkLineConstIterator.h.

template<class TImage >

typedef PixelContainer::Pointer itk::LineConstIterator< TImage >::PixelContainerPointer

Reimplemented in itk::LineIterator< TImage >.

Definition at line 92 of file itkLineConstIterator.h.

template<class TImage >

typedef TImage::PixelType itk::LineConstIterator< TImage >::PixelType

External Pixel Type

Reimplemented in itk::LineIterator< TImage >.

Definition at line 98 of file itkLineConstIterator.h.

template<class TImage >

typedef TImage::PointType itk::LineConstIterator< TImage >::PointType

Origin typedef support

Definition at line 83 of file itkLineConstIterator.h.

template<class TImage >

typedef TImage::RegionType itk::LineConstIterator< TImage >::RegionType

Region typedef support

Reimplemented in itk::LineIterator< TImage >.

Definition at line 77 of file itkLineConstIterator.h.

template<class TImage >

typedef LineConstIterator itk::LineConstIterator< TImage >::Self

Standard class typedefs.

Reimplemented in itk::LineIterator< TImage >.

Definition at line 55 of file itkLineConstIterator.h.

template<class TImage >

typedef TImage::SizeType itk::LineConstIterator< TImage >::SizeType

Size typedef support.

Reimplemented in itk::LineIterator< TImage >.

Definition at line 73 of file itkLineConstIterator.h.

template<class TImage >

typedef TImage::SizeValueType itk::LineConstIterator< TImage >::SizeValueType

Reimplemented in itk::LineIterator< TImage >.

Definition at line 74 of file itkLineConstIterator.h.

template<class TImage >

typedef TImage::SpacingType itk::LineConstIterator< TImage >::SpacingType

Spacing typedef support

Definition at line 80 of file itkLineConstIterator.h.

Constructor & Destructor Documentation

template<class TImage >

itk::LineConstIterator< TImage >::LineConstIterator	(	const ImageType *	imagePtr,
		const IndexType &	firstIndex,
		const IndexType &	lastIndex
	)

Constructor establishes an iterator to walk along a line

template<class TImage >

virtual itk::LineConstIterator< TImage >::~LineConstIterator ( ) [inline, virtual]

Default Destructor.

Definition at line 145 of file itkLineConstIterator.h.

Member Function Documentation

template<class TImage >

const PixelType& itk::LineConstIterator< TImage >::Get ( void ) const [inline]

Get the pixel value

Definition at line 120 of file itkLineConstIterator.h.

template<class TImage >

static unsigned int itk::LineConstIterator< TImage >::GetImageIteratorDimension ( ) [inline, static]

Get the dimension (size) of the index.

Definition at line 108 of file itkLineConstIterator.h.

References HardConnectedComponentImageFilter::ImageDimension.

template<class TImage >

const IndexType itk::LineConstIterator< TImage >::GetIndex ( void ) [inline]

Get the index. This provides a read only reference to the index.

Definition at line 114 of file itkLineConstIterator.h.

template<class TImage >

virtual const char* itk::LineConstIterator< TImage >::GetNameOfClass ( ) const [virtual]

Run-time type information (and related methods).

Reimplemented in itk::LineIterator< TImage >.

template<class TImage >

void itk::LineConstIterator< TImage >::GoToBegin ( )

Move an iterator to the beginning of the line.

template<class TImage >

bool itk::LineConstIterator< TImage >::IsAtEnd ( void ) [inline]

Is the iterator at the end of the line?

Definition at line 126 of file itkLineConstIterator.h.

template<class TImage >

void itk::LineConstIterator< TImage >::operator++ ( )

Walk forward along the line to the next index in the image.

template<class TImage >

Self& itk::LineConstIterator< TImage >::operator= ( const Self & it )

operator= is provided to make sure the handle to the image is properly reference counted.

Reimplemented in itk::LineIterator< TImage >.

Member Data Documentation

template<class TImage >

const unsigned int itk::LineConstIterator< TImage >::ImageIteratorDimension = TImage::ImageDimension [static]

Dimension of the image the iterator walks. This constant is needed so that functions that are templated over image iterator type (as opposed to being templated over pixel type and dimension) can have compile time access to the dimension of the image that the iterator walks.

Reimplemented in itk::LineIterator< TImage >.

Definition at line 62 of file itkLineConstIterator.h.

template<class TImage >

IndexType itk::LineConstIterator< TImage >::m_AccumulateError [protected]

Definition at line 169 of file itkLineConstIterator.h.

template<class TImage >

IndexType itk::LineConstIterator< TImage >::m_CurrentImageIndex [protected]

Start, end and current ND index position in the image of the line

Definition at line 159 of file itkLineConstIterator.h.

template<class TImage >

IndexType itk::LineConstIterator< TImage >::m_EndIndex [protected]

Definition at line 162 of file itkLineConstIterator.h.