#include <itkImageRegionReverseConstIterator.h>

Detailed Description

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

A multi-dimensional image iterator designed to walk a specified image region in reverse.

ImageRegionReverseConstIterator is a templated class to represent a multi-dimensional iterator. ImageRegionReverseConstIterator is templated over the dimension of the image and the data type of the image. ImageRegionReverseConstIterator is constrained to walk only within the specified region.

ImageRegionReverseConstIterator is a multi-dimensional iterator, requiring more information be specified before the iterator can be used than conventional iterators. Whereas the std::vector::iterator from the STL only needs to be passed a pointer to establish the iterator, the multi-dimensional image iterator needs a pointer, the size of the buffer, the size of the region, the start index of the buffer, and the start index of the region. To gain access to this information, ImageRegionReverseConstIterator holds a reference to the image over which it is traversing.

ImageRegionReverseConstIterator 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. For a reverse iterator, operator++ moves backwards through the region. operator++ iterates across a row, constraining the movement to within a region of image. When the iterator reaches the boundary of the region along a row, the iterator automatically wraps to the previous row, starting at the last pixel in the row that is part of the region. This allows for simple processing loops of the form:

it.GoToBegin();
for (; !it.IsAtEnd(); ++it)
   {
   std::cout << it.Value() << std::endl;
   }

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

Definition at line 104 of file itkImageRegionReverseConstIterator.h.

Inheritance diagram for itk::ImageRegionReverseConstIterator< TImage >:

Collaboration diagram for itk::ImageRegionReverseConstIterator< TImage >:

Public Types
using	AccessorType

using	ImageType

using	IndexType

using	InternalPixelType

using	OffsetType

using	PixelContainer

using	PixelContainerPointer = typename PixelContainer::Pointer

using	PixelType

using	RegionType

using	Self = ImageRegionReverseConstIterator

using	SizeType

using	Superclass = ImageReverseConstIterator<TImage>

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

using	AccessorType = typename TImage::AccessorType

using	ImageType = TImage

using	IndexType = typename TImage::IndexType

using	InternalPixelType = typename TImage::InternalPixelType

using	OffsetType = typename TImage::OffsetType

using	PixelContainer = typename TImage::PixelContainer

using	PixelContainerPointer = typename PixelContainer::Pointer

using	PixelType = typename TImage::PixelType

using	RegionType = typename TImage::RegionType

using	Self = ImageReverseConstIterator

using	SizeType = typename TImage::SizeType

Public Member Functions
virtual const char *	GetNameOfClass () const

void	GoToBegin ()

void	GoToEnd ()

	ImageRegionReverseConstIterator ()

	ImageRegionReverseConstIterator (const ImageConstIterator< TImage > &it)

	ImageRegionReverseConstIterator (const ImageRegionIterator< TImage > &it)

	ImageRegionReverseConstIterator (const ImageReverseConstIterator< TImage > &it)

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

Self &	operator++ ()

Self &	operator-- ()

void	SetIndex (const IndexType &ind) override

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

const IndexType	GetIndex ()

const RegionType &	GetRegion () const

void	GoToBegin ()

void	GoToEnd ()

	ImageReverseConstIterator ()

	ImageReverseConstIterator (const ImageConstIterator< TImage > &it)

	ImageReverseConstIterator (const Self &it)

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

bool	IsAtBegin () const

bool	IsAtEnd () const

	ITK_UNEQUAL_OPERATOR_MEMBER_FUNCTION (Self)

Self &	operator= (const ImageConstIterator< TImage > &it)

Self &	operator= (const Self &it)

bool	operator== (const Self &it) const

void	Set (const PixelType &value) const

const PixelType &	Value ()

const PixelType &	Value () const

virtual	~ImageReverseConstIterator ()=default

Protected Attributes
SizeValueType	m_SpanBeginOffset {}

SizeValueType	m_SpanEndOffset {}

Protected Attributes inherited from itk::ImageReverseConstIterator< TImage >
SizeValueType	m_BeginOffset {}

const InternalPixelType *	m_Buffer {}

SizeValueType	m_EndOffset {}

ImageType::ConstWeakPointer	m_Image {}

SizeValueType	m_Offset {}

AccessorType	m_PixelAccessor {}

AccessorFunctorType	m_PixelAccessorFunctor {}

RegionType	m_Region {}

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

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

Member Typedef Documentation

◆ AccessorType

template<typename TImage>

using itk::ImageReverseConstIterator< TImage >::AccessorType

Accessor type that convert data between internal and external representations.

Definition at line 132 of file itkImageReverseConstIterator.h.

◆ ImageType

template<typename TImage>

using itk::ImageReverseConstIterator< TImage >::ImageType

Image type alias support

Definition at line 116 of file itkImageReverseConstIterator.h.

◆ IndexType

template<typename TImage>

using itk::ImageReverseConstIterator< TImage >::IndexType

Index type alias support

Definition at line 104 of file itkImageReverseConstIterator.h.

◆ InternalPixelType

template<typename TImage>

using itk::ImageReverseConstIterator< TImage >::InternalPixelType

Internal Pixel Type

Definition at line 125 of file itkImageReverseConstIterator.h.

◆ OffsetType

template<typename TImage>

using itk::ImageReverseConstIterator< TImage >::OffsetType

Offset type alias support

Definition at line 110 of file itkImageReverseConstIterator.h.

◆ PixelContainer

template<typename TImage>

using itk::ImageReverseConstIterator< TImage >::PixelContainer

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

Definition at line 121 of file itkImageReverseConstIterator.h.

◆ PixelContainerPointer

template<typename TImage>

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

Definition at line 134 of file itkImageRegionReverseConstIterator.h.

◆ PixelType

template<typename TImage>

using itk::ImageReverseConstIterator< TImage >::PixelType

External Pixel Type

Definition at line 128 of file itkImageReverseConstIterator.h.

◆ RegionType

template<typename TImage>

using itk::ImageReverseConstIterator< TImage >::RegionType

Region type alias support

Definition at line 113 of file itkImageReverseConstIterator.h.

◆ Self

template<typename TImage>

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

Standard class type aliases.

Definition at line 108 of file itkImageRegionReverseConstIterator.h.

◆ SizeType

template<typename TImage>

using itk::ImageReverseConstIterator< TImage >::SizeType

Size type alias support

Definition at line 107 of file itkImageReverseConstIterator.h.

◆ Superclass

template<typename TImage>

using itk::ImageRegionReverseConstIterator< TImage >::Superclass = ImageReverseConstIterator<TImage>

Definition at line 109 of file itkImageRegionReverseConstIterator.h.

Constructor & Destructor Documentation

◆ ImageRegionReverseConstIterator() [1/5]

template<typename TImage>

itk::ImageRegionReverseConstIterator< TImage >::ImageRegionReverseConstIterator ( )

inline

Default constructor. Needed since we provide a cast constructor.

Definition at line 150 of file itkImageRegionReverseConstIterator.h.

Referenced by GetNameOfClass(), itk::ImageRegionReverseIterator< TImage >::ImageRegionReverseIterator(), itk::ImageReverseIterator< TImage >::ImageReverseIterator(), itk::ImageRegionReverseIterator< TImage >::operator=(), and itk::ImageReverseIterator< TImage >::operator=().

◆ ImageRegionReverseConstIterator() [2/5]

template<typename TImage>

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

inline

Constructor establishes an iterator to walk a particular image and a particular region of that image. Initializes the iterator at the begin of the region.

Definition at line 156 of file itkImageRegionReverseConstIterator.h.

References itk::ImageReverseConstIterator< TImage >::m_BeginOffset, itk::ImageReverseConstIterator< TImage >::m_Region, m_SpanBeginOffset, and m_SpanEndOffset.

◆ ImageRegionReverseConstIterator() [3/5]

template<typename TImage>

itk::ImageRegionReverseConstIterator< TImage >::ImageRegionReverseConstIterator ( const ImageConstIterator< TImage > & it )

inline

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

Definition at line 169 of file itkImageRegionReverseConstIterator.h.

References itk::ImageReverseConstIterator< TImage >::GetIndex(), itk::ImageReverseConstIterator< TImage >::m_Offset, itk::ImageReverseConstIterator< TImage >::m_Region, m_SpanBeginOffset, and m_SpanEndOffset.

◆ ImageRegionReverseConstIterator() [4/5]

template<typename TImage>

itk::ImageRegionReverseConstIterator< TImage >::ImageRegionReverseConstIterator ( const ImageReverseConstIterator< TImage > & it )

inline

Constructor that takes in a reverse image iterator. This can be used to cast between the various types of reverse image iterators.

Definition at line 181 of file itkImageRegionReverseConstIterator.h.

References itk::ImageReverseConstIterator< TImage >::GetIndex(), itk::ImageReverseConstIterator< TImage >::ImageReverseConstIterator(), itk::ImageReverseConstIterator< TImage >::m_Offset, itk::ImageReverseConstIterator< TImage >::m_Region, m_SpanBeginOffset, and m_SpanEndOffset.

◆ ImageRegionReverseConstIterator() [5/5]

template<typename TImage>

itk::ImageRegionReverseConstIterator< TImage >::ImageRegionReverseConstIterator ( const ImageRegionIterator< TImage > & it )

inline

Constructor that takes in an image region iterator. This can be used to cast between the various types of reverse image iterators.

Definition at line 193 of file itkImageRegionReverseConstIterator.h.

References itk::ImageReverseConstIterator< TImage >::GetIndex(), itk::ImageReverseConstIterator< TImage >::m_Offset, itk::ImageReverseConstIterator< TImage >::m_Region, m_SpanBeginOffset, and m_SpanEndOffset.

Member Function Documentation

◆ GetNameOfClass()

template<typename TImage>

virtual const char * itk::ImageRegionReverseConstIterator< TImage >::GetNameOfClass ( ) const

virtual

See also: LightObject::GetNameOfClass()

Reimplemented from itk::ImageReverseConstIterator< TImage >.

References ImageRegionReverseConstIterator().

◆ GoToBegin()

template<typename TImage>

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

inline

Move an iterator to the beginning of the region. "Begin" for a reverse iterator is the last pixel in the region.

Definition at line 206 of file itkImageRegionReverseConstIterator.h.

References itk::ImageReverseConstIterator< TImage >::GoToBegin(), itk::ImageReverseConstIterator< TImage >::m_BeginOffset, itk::ImageReverseConstIterator< TImage >::m_Region, m_SpanBeginOffset, and m_SpanEndOffset.

◆ GoToEnd()

template<typename TImage>

void itk::ImageRegionReverseConstIterator< TImage >::GoToEnd ( )

inline

Move an iterator to the end of the region. "End" for a reverse iterator is defined as one pixel before the first pixel in the region.

Definition at line 218 of file itkImageRegionReverseConstIterator.h.

References itk::ImageReverseConstIterator< TImage >::GoToEnd(), itk::ImageReverseConstIterator< TImage >::m_EndOffset, itk::ImageReverseConstIterator< TImage >::m_Region, m_SpanBeginOffset, and m_SpanEndOffset.

◆ operator++()

template<typename TImage>

Self & itk::ImageRegionReverseConstIterator< TImage >::operator++ ( )

inline

iterator's index. For a reverse iterator, this moves backwards through the region. This operator will constrain the iterator within the region (i.e. the iterator will automatically wrap from the start of the row of the region to the end of the previous row of the region) up until the iterator tries to moves before the first pixel of the region. Here, the iterator will be set to be one pixel before the start of the region.

See also: operator++(int).

Definition at line 248 of file itkImageRegionReverseConstIterator.h.

References itk::ImageReverseConstIterator< TImage >::ImageIteratorDimension, itk::ImageReverseConstIterator< TImage >::m_Image, itk::ImageReverseConstIterator< TImage >::m_Offset, itk::ImageReverseConstIterator< TImage >::m_Region, m_SpanBeginOffset, and m_SpanEndOffset.

◆ operator--()

template<typename TImage>

Self & itk::ImageRegionReverseConstIterator< TImage >::operator-- ( )

inline

Decrement (prefix) the fastest moving dimension of the iterator's index. For a reverse iterator, this moves forward through the region. This operator will constrain the iterator within the region (i.e. the iterator will automatically wrap from the end of the row of the region to the start of the next row of the region) up until the iterator tries to moves past the last pixel of the region. Here, the iterator will be set to be one pixel past the end of the region.