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

#include <itkImageRegionReverseConstIterator.h>

Inheritance diagram for itk::ImageRegionReverseConstIterator< TImage >:

Collaboration diagram for itk::ImageRegionReverseConstIterator< TImage >:

Public Types
enum	{ ImageIteratorDimension = Superclass::ImageIteratorDimension }
typedef TImage::AccessorFunctorType	AccessorFunctorType
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 PixelContainer::Pointer	PixelContainerPointer
typedef Superclass::PixelType	PixelType
typedef Superclass::RegionType	RegionType
typedef ImageRegionReverseConstIterator	Self
typedef Superclass::SizeType	SizeType
typedef Superclass::SizeValueType	SizeValueType
typedef ImageReverseConstIterator < TImage >	Superclass

Public Member Functions
	ImageRegionReverseConstIterator ()
	ImageRegionReverseConstIterator (ImageType *ptr, const RegionType &region)
	ImageRegionReverseConstIterator (const ImageConstIterator< TImage > &it)
	ImageRegionReverseConstIterator (const ImageReverseConstIterator< TImage > &it)
	ImageRegionReverseConstIterator (const ImageRegionIterator< TImage > &it)
Self	Begin (void) const
Self	End (void) const
const PixelType	Get (void) const
const IndexType	GetIndex ()
virtual const char *	GetNameOfClass () const
const RegionType &	GetRegion () const
void	GoToBegin ()
void	GoToEnd ()
bool	IsAtBegin ()
bool	IsAtEnd ()
bool	operator!= (const Self &it) const
Self &	operator++ ()
Self &	operator-- ()
bool	operator== (const Self &it) const
void	Set (const PixelType &value) const
void	SetIndex (const IndexType &ind)
const PixelType &	Value (void) const
const PixelType &	Value (void)

Static Public Member Functions
static unsigned int	GetImageIteratorDimension ()

Protected Attributes
unsigned long	m_BeginOffset
const InternalPixelType *	m_Buffer
unsigned long	m_EndOffset
ImageType::ConstWeakPointer	m_Image
unsigned long	m_Offset
AccessorType	m_PixelAccessor
AccessorFunctorType	m_PixelAccessorFunctor
RegionType	m_Region
unsigned long	m_SpanBeginOffset
unsigned long	m_SpanEndOffset

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 = it.Begin();
        for (; !it.IsAtEnd(); ++it)
           {
           *it += 100.0;
           }

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 http://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 101 of file itkImageRegionReverseConstIterator.h.

Member Typedef Documentation

template<typename TImage>

typedef TImage::AccessorFunctorType itk::ImageReverseConstIterator< TImage >::AccessorFunctorType

inherited

Functor to choose the appropriate accessor. (for Image vs VectorImage)

Definition at line 135 of file itkImageReverseConstIterator.h.

template<typename TImage>

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

Accessor type that convert data between internal and external representations.

Reimplemented from itk::ImageReverseConstIterator< TImage >.

Reimplemented in itk::ImageRegionReverseIterator< TImage >, and itk::ImageReverseIterator< TImage >.

Definition at line 150 of file itkImageRegionReverseConstIterator.h.

template<typename TImage>

typedef Superclass::ImageType itk::ImageRegionReverseConstIterator< 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.

Reimplemented from itk::ImageReverseConstIterator< TImage >.

Reimplemented in itk::ImageRegionReverseIterator< TImage >, and itk::ImageReverseIterator< TImage >.

Definition at line 134 of file itkImageRegionReverseConstIterator.h.

template<typename TImage>

typedef Superclass::IndexType itk::ImageRegionReverseConstIterator< 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.

Reimplemented from itk::ImageReverseConstIterator< TImage >.

Reimplemented in itk::ImageRegionReverseIterator< TImage >, and itk::ImageReverseIterator< TImage >.

Definition at line 116 of file itkImageRegionReverseConstIterator.h.

template<typename TImage>

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

Reimplemented from itk::ImageReverseConstIterator< TImage >.

Reimplemented in itk::ImageRegionReverseIterator< TImage >, and itk::ImageReverseIterator< TImage >.

Definition at line 117 of file itkImageRegionReverseConstIterator.h.

template<typename TImage>

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

Internal Pixel Type

Reimplemented from itk::ImageReverseConstIterator< TImage >.

Reimplemented in itk::ImageRegionReverseIterator< TImage >, and itk::ImageReverseIterator< TImage >.

Definition at line 143 of file itkImageRegionReverseConstIterator.h.

template<typename TImage>

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

Offset 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.

Reimplemented from itk::ImageReverseConstIterator< TImage >.

Reimplemented in itk::ImageRegionReverseIterator< TImage >, and itk::ImageReverseIterator< TImage >.

Definition at line 126 of file itkImageRegionReverseConstIterator.h.

template<typename TImage>

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

Reimplemented from itk::ImageReverseConstIterator< TImage >.

Reimplemented in itk::ImageRegionReverseIterator< TImage >, and itk::ImageReverseIterator< TImage >.

Definition at line 127 of file itkImageRegionReverseConstIterator.h.

template<typename TImage>

typedef Superclass::PixelContainer itk::ImageRegionReverseConstIterator< 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::ImageReverseConstIterator< TImage >.

Reimplemented in itk::ImageRegionReverseIterator< TImage >, and itk::ImageReverseIterator< TImage >.

Definition at line 139 of file itkImageRegionReverseConstIterator.h.

template<typename TImage>

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

Reimplemented from itk::ImageReverseConstIterator< TImage >.

Reimplemented in itk::ImageRegionReverseIterator< TImage >, and itk::ImageReverseIterator< TImage >.

Definition at line 140 of file itkImageRegionReverseConstIterator.h.

template<typename TImage>

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

External Pixel Type

Reimplemented from itk::ImageReverseConstIterator< TImage >.

Reimplemented in itk::ImageRegionReverseIterator< TImage >, and itk::ImageReverseIterator< TImage >.

Definition at line 146 of file itkImageRegionReverseConstIterator.h.

template<typename TImage>

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

Region typedef support.

Reimplemented from itk::ImageReverseConstIterator< TImage >.

Reimplemented in itk::ImageRegionReverseIterator< TImage >, and itk::ImageReverseIterator< TImage >.

Definition at line 130 of file itkImageRegionReverseConstIterator.h.

template<typename TImage>

typedef ImageRegionReverseConstIterator itk::ImageRegionReverseConstIterator< TImage >::Self

Standard class typedefs.

Reimplemented from itk::ImageReverseConstIterator< TImage >.

Reimplemented in itk::ImageRegionReverseIterator< TImage >, and itk::ImageReverseIterator< TImage >.

Definition at line 105 of file itkImageRegionReverseConstIterator.h.

template<typename TImage>

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

Size 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.

Reimplemented from itk::ImageReverseConstIterator< TImage >.

Reimplemented in itk::ImageRegionReverseIterator< TImage >, and itk::ImageReverseIterator< TImage >.

Definition at line 121 of file itkImageRegionReverseConstIterator.h.

template<typename TImage>

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

Reimplemented from itk::ImageReverseConstIterator< TImage >.

Reimplemented in itk::ImageRegionReverseIterator< TImage >, and itk::ImageReverseIterator< TImage >.

Definition at line 122 of file itkImageRegionReverseConstIterator.h.

template<typename TImage>

typedef ImageReverseConstIterator<TImage> itk::ImageRegionReverseConstIterator< TImage >::Superclass

Reimplemented in itk::ImageRegionReverseIterator< TImage >, and itk::ImageReverseIterator< TImage >.

Definition at line 106 of file itkImageRegionReverseConstIterator.h.

Member Enumeration Documentation

template<typename TImage>

anonymous enum

Dimension of the image the iterator walks. This enum 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.

Enumerator:

ImageIteratorDimension

Dimension of the image the iterator walks. This constant is needed so 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.

Definition at line 112 of file itkImageRegionReverseConstIterator.h.

Constructor & Destructor Documentation

template<typename TImage>

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

inline

Default constructor. Needed since we provide a cast constructor.

Definition at line 156 of file itkImageRegionReverseConstIterator.h.

template<typename TImage>

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

inline

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

Definition at line 164 of file itkImageRegionReverseConstIterator.h.

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 178 of file itkImageRegionReverseConstIterator.h.

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 188 of file itkImageRegionReverseConstIterator.h.

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 198 of file itkImageRegionReverseConstIterator.h.

Member Function Documentation

template<typename TImage >

ImageRegionReverseConstIterator< TImage > itk::ImageRegionReverseConstIterator< TImage >::Begin ( void ) const

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

Deprecated:: Use GoToBegin() instead

Reimplemented from itk::ImageReverseConstIterator< TImage >.

Reimplemented in itk::ImageRegionReverseIterator< TImage >.

Definition at line 28 of file itkImageRegionReverseConstIterator.txx.

References itk::ImageRegionReverseConstIterator< TImage >::GoToBegin().

template<typename TImage >

ImageRegionReverseConstIterator< TImage > itk::ImageRegionReverseConstIterator< TImage >::End ( void ) const

Return an iterator for the end of the region. "End" for a reverse iterator is one pixel before the first pixel in the region.

Deprecated:: Use GoToEnd() instead

Reimplemented from itk::ImageReverseConstIterator< TImage >.

Reimplemented in itk::ImageRegionReverseIterator< TImage >.

Definition at line 43 of file itkImageRegionReverseConstIterator.txx.

References itk::ImageRegionReverseConstIterator< TImage >::GoToEnd().

template<typename TImage>

const PixelType itk::ImageReverseConstIterator< TImage >::Get ( void ) const

inlineinherited

Get the pixel value

Definition at line 319 of file itkImageReverseConstIterator.h.

template<typename TImage>

static unsigned int itk::ImageReverseConstIterator< TImage >::GetImageIteratorDimension ( )

inlinestaticinherited

Get the dimension (size) of the index.

Definition at line 279 of file itkImageReverseConstIterator.h.

template<typename TImage>

const IndexType itk::ImageReverseConstIterator< TImage >::GetIndex ( void )

inlineinherited

Get the index. This provides a read only reference to the index. This causes the index to be calculated from pointer arithmetic and is therefore an expensive operation.

See also:: SetIndex

Definition at line 304 of file itkImageReverseConstIterator.h.

Referenced by itk::ImageRegionReverseConstIterator< TImage >::operator--().

template<typename TImage>

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

virtual

Run-time type information (and related methods).

template<typename TImage>

const RegionType& itk::ImageReverseConstIterator< TImage >::GetRegion ( void ) const

inlineinherited

Get the region that this iterator walks. ImageReverseConstIterators know the beginning and the end of the region of the image to iterate over.

Definition at line 315 of file itkImageReverseConstIterator.h.

template<typename TImage>

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

inline

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

Reimplemented from itk::ImageReverseConstIterator< TImage >.

Definition at line 208 of file itkImageRegionReverseConstIterator.h.

Referenced by itk::ImageRegionReverseConstIterator< TImage >::Begin().

template<typename TImage>

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

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.

Reimplemented from itk::ImageReverseConstIterator< TImage >.

Definition at line 219 of file itkImageRegionReverseConstIterator.h.

Referenced by itk::ImageRegionReverseConstIterator< TImage >::End().

template<typename TImage>

bool itk::ImageReverseConstIterator< TImage >::IsAtBegin ( void )

inlineinherited

Is the iterator at the beginning of the (reverse) region? "Begin" for a reverse iterator is the last pixel in the region.

Definition at line 367 of file itkImageReverseConstIterator.h.

template<typename TImage>

bool itk::ImageReverseConstIterator< TImage >::IsAtEnd ( void )

inlineinherited

Is the iterator at the end of the (reverse) region? "End" for a reverse iterator is one pixel before the first pixel in the region.

Definition at line 374 of file itkImageReverseConstIterator.h.

template<typename TImage>

bool itk::ImageReverseConstIterator< TImage >::operator!= ( const Self & it ) const

inlineinherited

Comparison operator. Two iterators are the same if they "point to" the same memory location

Definition at line 285 of file itkImageReverseConstIterator.h.

References itk::ImageReverseConstIterator< TImage >::m_Buffer, and itk::ImageReverseConstIterator< TImage >::m_Offset.

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 260 of file itkImageRegionReverseConstIterator.h.

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.