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

#include <itkLineIterator.h>

Inheritance diagram for itk::LineIterator< TImage >:

Collaboration diagram for itk::LineIterator< TImage >:

Public Types
typedef Superclass::AccessorType	AccessorType
typedef Superclass::ImageType	ImageType
typedef Superclass::IndexType	IndexType
typedef Superclass::IndexValueType	IndexValueType
typedef Superclass::InternalPixelType	InternalPixelType
typedef Superclass::OffsetType	OffsetType
typedef Superclass::OffsetValueType	OffsetValueType
typedef Superclass::PixelContainer	PixelContainer
typedef Superclass::PixelContainerPointer	PixelContainerPointer
typedef Superclass::PixelType	PixelType
typedef TImage::PointType	PointType
typedef Superclass::RegionType	RegionType
typedef LineIterator	Self
typedef Superclass::SizeType	SizeType
typedef Superclass::SizeValueType	SizeValueType
typedef TImage::SpacingType	SpacingType
typedef LineConstIterator< TImage >	Superclass
Public Member Functions
const PixelType &	Get (void) const
const IndexType	GetIndex ()
virtual const char *	GetNameOfClass () const
void	GoToBegin ()
bool	IsAtEnd ()
	LineIterator (ImageType *imagePtr, const IndexType &firstIndex, const IndexType &lastIndex)
void	operator++ ()
Self &	operator= (const Self &it)
const PixelType &	Value (void)
virtual	~LineIterator ()


void	Set (const PixelType &value)
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::LineIterator< TImage >

Iterator that walks a Bresenham line through an ND image.

LineIterator 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.

See also:: LineConstIterator

Definition at line 52 of file itkLineIterator.h.

Member Typedef Documentation

template<class TImage >

typedef Superclass::AccessorType itk::LineIterator< TImage >::AccessorType

Accessor type that convert data between internal and external representations.

Reimplemented from itk::LineConstIterator< TImage >.

Definition at line 82 of file itkLineIterator.h.

template<class TImage >

typedef Superclass::ImageType itk::LineIterator< TImage >::ImageType

Image typedef support.

Reimplemented from itk::LineConstIterator< TImage >.

Definition at line 77 of file itkLineIterator.h.

template<class TImage >

typedef Superclass::IndexType itk::LineIterator< TImage >::IndexType

Inherit types from the superclass

Reimplemented from itk::LineConstIterator< TImage >.

Definition at line 70 of file itkLineIterator.h.

template<class TImage >

typedef Superclass::IndexValueType itk::LineIterator< TImage >::IndexValueType

Reimplemented from itk::LineConstIterator< TImage >.

Definition at line 71 of file itkLineIterator.h.

template<class TImage >

typedef Superclass::InternalPixelType itk::LineIterator< TImage >::InternalPixelType

Internal Pixel Type

Reimplemented from itk::LineConstIterator< TImage >.

Definition at line 80 of file itkLineIterator.h.

template<class TImage >

typedef Superclass::OffsetType itk::LineIterator< TImage >::OffsetType

Offset typedef support.

Reimplemented from itk::LineConstIterator< TImage >.

Definition at line 72 of file itkLineIterator.h.

template<class TImage >

typedef Superclass::OffsetValueType itk::LineIterator< TImage >::OffsetValueType

Reimplemented from itk::LineConstIterator< TImage >.

Definition at line 73 of file itkLineIterator.h.

template<class TImage >

typedef Superclass::PixelContainer itk::LineIterator< 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 from itk::LineConstIterator< TImage >.

Definition at line 78 of file itkLineIterator.h.

template<class TImage >

typedef Superclass::PixelContainerPointer itk::LineIterator< TImage >::PixelContainerPointer

Reimplemented from itk::LineConstIterator< TImage >.

Definition at line 79 of file itkLineIterator.h.

template<class TImage >

typedef Superclass::PixelType itk::LineIterator< TImage >::PixelType

External Pixel Type

Reimplemented from itk::LineConstIterator< TImage >.

Definition at line 81 of file itkLineIterator.h.

template<class TImage >

typedef TImage::PointType itk::LineConstIterator< TImage >::PointType [inherited]

Origin typedef support

Definition at line 83 of file itkLineConstIterator.h.

template<class TImage >

typedef Superclass::RegionType itk::LineIterator< TImage >::RegionType

Region typedef support

Reimplemented from itk::LineConstIterator< TImage >.

Definition at line 76 of file itkLineIterator.h.

template<class TImage >

typedef LineIterator itk::LineIterator< TImage >::Self

Standard class typedefs.

Reimplemented from itk::LineConstIterator< TImage >.

Definition at line 57 of file itkLineIterator.h.

template<class TImage >

typedef Superclass::SizeType itk::LineIterator< TImage >::SizeType

Size typedef support.

Reimplemented from itk::LineConstIterator< TImage >.

Definition at line 74 of file itkLineIterator.h.

template<class TImage >

typedef Superclass::SizeValueType itk::LineIterator< TImage >::SizeValueType

Reimplemented from itk::LineConstIterator< TImage >.

Definition at line 75 of file itkLineIterator.h.

template<class TImage >

typedef TImage::SpacingType itk::LineConstIterator< TImage >::SpacingType [inherited]

Spacing typedef support

Definition at line 80 of file itkLineConstIterator.h.

template<class TImage >

typedef LineConstIterator<TImage> itk::LineIterator< TImage >::Superclass

Define the superclass

Definition at line 67 of file itkLineIterator.h.

Constructor & Destructor Documentation

template<class TImage >

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

Constructor establishes an iterator to walk along a path

template<class TImage >

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

Default Destructor.

Definition at line 116 of file itkLineIterator.h.

Member Function Documentation

template<class TImage >

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

Get the pixel value

Definition at line 120 of file itkLineConstIterator.h.

template<class TImage >

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

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, inherited]

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::LineIterator< TImage >::GetNameOfClass ( ) const [virtual]

Run-time type information (and related methods).

Reimplemented from itk::LineConstIterator< TImage >.

template<class TImage >

void itk::LineConstIterator< TImage >::GoToBegin ( ) [inherited]

Move an iterator to the beginning of the line.

template<class TImage >

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

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++ ( ) [inherited]

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

template<class TImage >

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

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

Reimplemented from itk::LineConstIterator< TImage >.

template<class TImage >

void itk::LineIterator< TImage >::Set ( const PixelType & value ) [inline]

Set the pixel value

Definition at line 88 of file itkLineIterator.h.

template<class TImage >

const PixelType& itk::LineIterator< TImage >::Value ( void ) [inline]

Return a reference to the pixel This method will provide the fastest access to pixel data, but it will NOT support ImageAdaptors.

Definition at line 102 of file itkLineIterator.h.

Member Data Documentation

template<class TImage >

const unsigned int itk::LineIterator< 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 from itk::LineConstIterator< TImage >.

Definition at line 64 of file itkLineIterator.h.

template<class TImage >

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

Definition at line 169 of file itkLineConstIterator.h.

template<class TImage >

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

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, inherited]

Definition at line 162 of file itkLineConstIterator.h.