#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();
 }

Examples:: ImageLinearIteratorWithIndex.cxx, and itkVectorImageTest.cxx.

Definition at line 103 of file itkImageLinearConstIteratorWithIndex.h.

Public Types
typedef TImage	ImageType

typedef TImage::IndexType	IndexType

typedef TImage::PixelContainer	PixelContainer

typedef PixelContainer::Pointer	PixelContainerPointer

typedef TImage::RegionType	RegionType

typedef ImageLinearConstIteratorWithIndex	Self

typedef ImageConstIteratorWithIndex < TImage >	Superclass

Public Types inherited from itk::ImageConstIteratorWithIndex< TImage >
typedef TImage::AccessorFunctorType	AccessorFunctorType

typedef TImage::AccessorType	AccessorType

typedef TImage	ImageType

typedef TImage::IndexType	IndexType

typedef IndexType::IndexValueType	IndexValueType

typedef TImage::InternalPixelType	InternalPixelType

typedef TImage::OffsetType	OffsetType

typedef OffsetType::OffsetValueType	OffsetValueType

typedef TImage::PixelContainer	PixelContainer

typedef PixelContainer::Pointer	PixelContainerPointer

typedef TImage::PixelType	PixelType

typedef TImage::RegionType	RegionType

typedef ImageConstIteratorWithIndex	Self

typedef TImage::SizeType	SizeType

typedef SizeType::SizeValueType	SizeValueType

Public Member Functions
unsigned int	GetDirection ()

void	GoToBeginOfLine (void)

void	GoToEndOfLine (void)

void	GoToReverseBeginOfLine (void)

	ImageLinearConstIteratorWithIndex ()

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

	ImageLinearConstIteratorWithIndex (const ImageConstIteratorWithIndex< TImage > &it)

bool	IsAtEndOfLine (void)

bool	IsAtReverseEndOfLine (void)

void	NextLine (void)

void	PreviousLine (void)


void	SetDirection (unsigned int direction)


Self &	operator++ ()


Self &	operator-- ()

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

const IndexType &	GetIndex () const

const RegionType &	GetRegion () const

void	GoToBegin (void)

void	GoToReverseBegin (void)

	ImageConstIteratorWithIndex ()

	ImageConstIteratorWithIndex (const Self &it)

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

bool	IsAtEnd (void) const

bool	IsAtReverseEnd (void) const

	itkLegacyMacro (Self Begin(void) const)

	itkLegacyMacro (Self End(void) 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 (void) const

virtual	~ImageConstIteratorWithIndex ()

void	SetIndex (const IndexType &ind)

Private Attributes
unsigned int	m_Direction

OffsetValueType	m_Jump

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 const 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>

typedef TImage itk::ImageLinearConstIteratorWithIndex< TImage >::ImageType

Image typedef 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 126 of file itkImageLinearConstIteratorWithIndex.h.

template<typename TImage>

typedef TImage::IndexType itk::ImageLinearConstIteratorWithIndex< TImage >::IndexType

Index typedef 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 114 of file itkImageLinearConstIteratorWithIndex.h.

template<typename TImage>

typedef TImage::PixelContainer itk::ImageLinearConstIteratorWithIndex< 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.

Definition at line 131 of file itkImageLinearConstIteratorWithIndex.h.

template<typename TImage>

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

Definition at line 132 of file itkImageLinearConstIteratorWithIndex.h.

template<typename TImage>

typedef TImage::RegionType itk::ImageLinearConstIteratorWithIndex< TImage >::RegionType

Region typedef 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 120 of file itkImageLinearConstIteratorWithIndex.h.

template<typename TImage>

typedef ImageLinearConstIteratorWithIndex itk::ImageLinearConstIteratorWithIndex< TImage >::Self

Standard class typedefs.

Definition at line 107 of file itkImageLinearConstIteratorWithIndex.h.

template<typename TImage>

typedef ImageConstIteratorWithIndex< TImage > itk::ImageLinearConstIteratorWithIndex< TImage >::Superclass

Definition at line 108 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 135 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 147 of file itkImageLinearConstIteratorWithIndex.h.