#include <itkImageLinearConstIteratorWithIndex.h>

Inheritance diagram for itk::ImageLinearConstIteratorWithIndex< TImage >:

Collaboration diagram for itk::ImageLinearConstIteratorWithIndex< TImage >:

Detailed Description

template<typename TImage>
class itk::ImageLinearConstIteratorWithIndex< TImage >

A multi-dimensional image iterator that visits image pixels within a region in a "scan-line" order.

ImageLinearConstIteratorWithIndex is templated over image type and is constrained to walk within a specified image region. It is designed for line-by-line processing of images. This iterator walks a linear path along a selected image direction that is parallel to one of the coordinate axes of the image. The iterator conceptually breaks the image into a set of parallel lines that span the selected image dimension.

ImageLinearConstIteratorWithIndex assumes a particular layout of the image data. The is arranged in a 1D array as if it were [][][][slice][row][col] with Index[0] = col, Index[1] = row, Index[2] = slice, etc.

operator++ provides a simple syntax for walking around a region of a multidimensional image. operator++ iterates across a preselected direction constraining the movement to within a region of image. The user can verify when the iterator reaches the boundary of the region along this direction, by calling the IsAtEndOfLine() method. Then it is possible to pass to the next line starting at the first pixel in the row that is part of the region by calling the NextLine() method.

This is the typical use of this iterator in a loop:

ImageLinearConstIteratorWithIndex<ImageType> it( image, image->GetRequestedRegion() );
it.SetDirection(2);
it.GoToBegin();
while( !it.IsAtEnd() )
{
  while( !it.IsAtEndOfLine() )
  {
     value = it.Get();  // it.Set() doesn't exist in the Const Iterator
     ++it;
  }
  it.NextLine();
 }

MORE INFORMATION: For a complete description of the ITK Image Iterators and their API, please see the Iterators chapter in the ITK Software Guide. The ITK Software Guide is available in print and as a free .pdf download from https://www.itk.org.

See Also: ImageConstIterator; ConditionalConstIterator; ConstNeighborhoodIterator; ConstShapedNeighborhoodIterator; ConstSliceIterator; CorrespondenceDataStructureIterator; FloodFilledFunctionConditionalConstIterator; FloodFilledImageFunctionConditionalConstIterator; FloodFilledImageFunctionConditionalIterator; FloodFilledSpatialFunctionConditionalConstIterator; FloodFilledSpatialFunctionConditionalIterator; ImageConstIterator; ImageConstIteratorWithIndex; ImageIterator; ImageIteratorWithIndex; ImageLinearConstIteratorWithIndex; ImageLinearIteratorWithIndex; ImageRandomConstIteratorWithIndex; ImageRandomIteratorWithIndex; ImageRegionConstIterator; ImageRegionConstIteratorWithIndex; ImageRegionExclusionConstIteratorWithIndex; ImageRegionExclusionIteratorWithIndex; ImageRegionIterator; ImageRegionIteratorWithIndex; ImageRegionReverseConstIterator; ImageRegionReverseIterator; ImageReverseConstIterator; ImageReverseIterator; ImageSliceConstIteratorWithIndex; ImageSliceIteratorWithIndex; NeighborhoodIterator; PathConstIterator; PathIterator; ShapedNeighborhoodIterator; SliceIterator; ImageConstIteratorWithIndex

Examples:: Examples/Iterators/ImageLinearIteratorWithIndex.cxx, and Examples/Iterators/ImageLinearIteratorWithIndex2.cxx.

Definition at line 101 of file itkImageLinearConstIteratorWithIndex.h.

Public Types
using	ImageType = TImage

using	IndexType = typename TImage::IndexType

using	PixelContainer = typename TImage::PixelContainer

using	PixelContainerPointer = typename PixelContainer::Pointer

using	RegionType = typename TImage::RegionType

using	Self = ImageLinearConstIteratorWithIndex

using	Superclass = ImageConstIteratorWithIndex< TImage >

Public Types inherited from itk::ImageConstIteratorWithIndex< TImage >
using	AccessorFunctorType = typename TImage::AccessorFunctorType

using	AccessorType = typename TImage::AccessorType

using	ImageType = TImage

using	IndexType = typename TImage::IndexType

using	IndexValueType = typename IndexType::IndexValueType

using	InternalPixelType = typename TImage::InternalPixelType

using	OffsetType = typename TImage::OffsetType

using	OffsetValueType = typename OffsetType::OffsetValueType

using	PixelContainer = typename TImage::PixelContainer

using	PixelContainerPointer = typename PixelContainer::Pointer

using	PixelType = typename TImage::PixelType

using	RegionType = typename TImage::RegionType

using	Self = ImageConstIteratorWithIndex

using	SizeType = typename TImage::SizeType

using	SizeValueType = typename SizeType::SizeValueType

Public Member Functions
unsigned int	GetDirection ()

void	GoToBeginOfLine ()

void	GoToEndOfLine ()

void	GoToReverseBeginOfLine ()

	ImageLinearConstIteratorWithIndex ()

	ImageLinearConstIteratorWithIndex (const ImageType *ptr, const RegionType &region)

	ImageLinearConstIteratorWithIndex (const ImageConstIteratorWithIndex< TImage > &it)

bool	IsAtEndOfLine () const

bool	IsAtReverseEndOfLine () const

void	NextLine ()

void	PreviousLine ()


void	SetDirection (unsigned int direction)


Self &	operator++ ()


Self &	operator-- ()

Public Member Functions inherited from itk::ImageConstIteratorWithIndex< TImage >
PixelType	Get () const

const IndexType &	GetIndex () const

const RegionType &	GetRegion () const

void	GoToBegin ()

void	GoToReverseBegin ()

	ImageConstIteratorWithIndex ()

	ImageConstIteratorWithIndex (const Self &it)

	ImageConstIteratorWithIndex (const TImage *ptr, const RegionType &region)

bool	IsAtEnd () const

bool	IsAtReverseEnd () const

bool	operator!= (const Self &it) const

bool	operator< (const Self &it) const

bool	operator<= (const Self &it) const

Self &	operator= (const Self &it)

bool	operator== (const Self &it) const

bool	operator> (const Self &it) const

bool	operator>= (const Self &it) const

bool	Remaining ()

const PixelType &	Value () const

virtual	~ImageConstIteratorWithIndex ()=default

void	SetIndex (const IndexType &ind)

Private Attributes
unsigned int	m_Direction {0}

OffsetValueType	m_Jump {0}

Additional Inherited Members
Static Public Member Functions inherited from itk::ImageConstIteratorWithIndex< TImage >
static unsigned int	GetImageDimension ()

Static Public Attributes inherited from itk::ImageConstIteratorWithIndex< TImage >
static constexpr unsigned int	ImageDimension = TImage::ImageDimension

Protected Attributes inherited from itk::ImageConstIteratorWithIndex< TImage >
const InternalPixelType *	m_Begin

IndexType	m_BeginIndex

const InternalPixelType *	m_End

IndexType	m_EndIndex

TImage::ConstWeakPointer	m_Image

OffsetValueType	m_OffsetTable [ImageDimension+1]

AccessorType	m_PixelAccessor

AccessorFunctorType	m_PixelAccessorFunctor

const InternalPixelType *	m_Position

IndexType	m_PositionIndex

RegionType	m_Region

bool	m_Remaining

Member Typedef Documentation

template<typename TImage>

using itk::ImageLinearConstIteratorWithIndex< TImage >::ImageType = TImage

Image type alias support While this was already typdef'ed in the superclass, it needs to be redone here for this subclass to compile properly with gcc. Note that we have to rescope Index back to itk::Index so that it is not confused with ImageIterator::Index.

Definition at line 124 of file itkImageLinearConstIteratorWithIndex.h.

template<typename TImage>

using itk::ImageLinearConstIteratorWithIndex< TImage >::IndexType = typename TImage::IndexType

Index type alias support While this was already typdef'ed in the superclass, it needs to be redone here for this subclass to compile properly with gcc. Note that we have to rescope Index back to itk::Index so that it is not confused with ImageIterator::Index.

Definition at line 112 of file itkImageLinearConstIteratorWithIndex.h.

template<typename TImage>

using itk::ImageLinearConstIteratorWithIndex< TImage >::PixelContainer = typename TImage::PixelContainer

PixelContainer type alias 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.

Definition at line 129 of file itkImageLinearConstIteratorWithIndex.h.

template<typename TImage>

using itk::ImageLinearConstIteratorWithIndex< TImage >::PixelContainerPointer = typename PixelContainer::Pointer

Definition at line 130 of file itkImageLinearConstIteratorWithIndex.h.

template<typename TImage>

using itk::ImageLinearConstIteratorWithIndex< TImage >::RegionType = typename TImage::RegionType

Region type alias support While this was already typdef'ed in the superclass, it needs to be redone here for this subclass to compile properly with gcc. Note that we have to rescope Region back to itk::ImageRegion so that it is not confused with ImageIterator::Index.

Definition at line 118 of file itkImageLinearConstIteratorWithIndex.h.

template<typename TImage>

using itk::ImageLinearConstIteratorWithIndex< TImage >::Self = ImageLinearConstIteratorWithIndex

Standard class type aliases.

Definition at line 105 of file itkImageLinearConstIteratorWithIndex.h.

template<typename TImage>

using itk::ImageLinearConstIteratorWithIndex< TImage >::Superclass = ImageConstIteratorWithIndex< TImage >

Definition at line 106 of file itkImageLinearConstIteratorWithIndex.h.

Constructor & Destructor Documentation

template<typename TImage>

itk::ImageLinearConstIteratorWithIndex< TImage >::ImageLinearConstIteratorWithIndex ( )

inline

Default constructor. Needed since we provide a cast constructor.

Definition at line 133 of file itkImageLinearConstIteratorWithIndex.h.

template<typename TImage>

itk::ImageLinearConstIteratorWithIndex< TImage >::ImageLinearConstIteratorWithIndex	(	const ImageType *	ptr,
		const RegionType &	region
	)

Constructor establishes an iterator to walk a particular image and a particular region of that image.

template<typename TImage>

itk::ImageLinearConstIteratorWithIndex< TImage >::ImageLinearConstIteratorWithIndex ( const ImageConstIteratorWithIndex< TImage > & it )

inline

Constructor that can be used to cast from an ImageIterator to an ImageLinearConstIteratorWithIndex. Many routines return an ImageIterator but for a particular task, you may want an ImageLinearConstIteratorWithIndex. Rather than provide overloaded APIs that return different types of Iterators, itk returns ImageIterators and uses constructors to cast from an ImageIterator to a ImageLinearConstIteratorWithIndex.

Definition at line 148 of file itkImageLinearConstIteratorWithIndex.h.