itk::ImageRandomConstIteratorWithOnlyIndex< TImage > Class Template Reference

#include <itkImageRandomConstIteratorWithOnlyIndex.h>

Detailed Description

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

A multi-dimensional image iterator that visits a random set of locations within an image region, providing index information.

ImageRandomConstIteratorWithOnlyIndex is a multi-dimensional iterator class that is templated over image type. ImageRandomConstIteratorWithOnlyIndex is constrained to walk only within the specified region. It samples random region positions at each increment or decrement.

No access to image data is possible, and thus the class can be used with images of type ImageBase.

ImageRandomConstIteratorWithOnlyIndex 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.

The operator++ method provides a simple syntax for walking around a region of a multidimensional image. operator++ performs a jump to a random position within the specified image region. This is designed to facilitate the extraction of random indices from the image.

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

ImageRandomConstIteratorWithOnlyIndex<ImageType> it( image, image->GetRequestedRegion() );
 
it.SetNumberOfSamples(200);
it.GoToBegin();
while( !it.IsAtEnd() )
{
  std::cout << it.GetIndex() << std::endl;
  ++it;  // here it jumps to another random position inside the region
 }

or

ImageRandomConstIteratorWithOnlyIndex<ImageType> it( image, image->GetRequestedRegion() );
 
it.SetNumberOfSamples(200);
it.GoToEnd();
while( !it.IsAtBegin() )
{
  std::cout << it.GetIndex() << std::endl;
  --it;  // here it jumps to another random position inside the region
 }

Warning

Incrementing the iterator (++it) followed by a decrement (–it) or vice versa does not in general return the iterator to the same position.

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.

Index-only iterators:

See also

ImageConstIteratorWithOnlyIndex

ConstNeighborhoodIteratorWithOnlyIndex

Pixel data-access iterators:

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 123 of file itkImageRandomConstIteratorWithOnlyIndex.h.

Inheritance diagram for itk::ImageRandomConstIteratorWithOnlyIndex< TImage >:

Collaboration diagram for itk::ImageRandomConstIteratorWithOnlyIndex< TImage >:

Public Types
using	ImageType = TImage
using	IndexType = typename TImage::IndexType
using	IndexValueType = typename IndexType::IndexValueType
using	OffsetType = typename TImage::OffsetType
using	OffsetValueType = typename OffsetType::OffsetValueType
using	RegionType = typename TImage::RegionType
using	Self = ImageRandomConstIteratorWithOnlyIndex
using	SizeType = typename TImage::SizeType
using	SizeValueType = typename SizeType::SizeValueType
using	Superclass = ImageConstIteratorWithOnlyIndex< TImage >
Public Types inherited from itk::ImageConstIteratorWithOnlyIndex< TImage >
using	ImageType = TImage
using	IndexType = typename TImage::IndexType
using	IndexValueType = typename IndexType::IndexValueType
using	OffsetType = typename TImage::OffsetType
using	OffsetValueType = typename OffsetType::OffsetValueType
using	RegionType = typename TImage::RegionType
using	Self = ImageConstIteratorWithOnlyIndex
using	SizeType = typename TImage::SizeType
using	SizeValueType = typename SizeType::SizeValueType

Public Member Functions
SizeValueType	GetNumberOfSamples () const
	ImageRandomConstIteratorWithOnlyIndex (const ImageConstIteratorWithOnlyIndex< TImage > &it)
	ImageRandomConstIteratorWithOnlyIndex (const ImageType *ptr, const RegionType &region)
bool	IsAtBegin () const
bool	IsAtEnd () const
void	ReinitializeSeed ()
void	ReinitializeSeed (int)
void	SetNumberOfSamples (SizeValueType number)
	ImageRandomConstIteratorWithOnlyIndex ()=default
	~ImageRandomConstIteratorWithOnlyIndex () override=default
void	GoToBegin ()
void	GoToEnd ()
Self &	operator++ ()
Self &	operator-- ()
Public Member Functions inherited from itk::ImageConstIteratorWithOnlyIndex< TImage >
const IndexType &	GetIndex () const
const RegionType &	GetRegion () const
void	GoToBegin ()
void	GoToReverseBegin ()
	ImageConstIteratorWithOnlyIndex ()=default
	ImageConstIteratorWithOnlyIndex (const TImage *ptr, const RegionType &region)
bool	IsAtEnd () const
bool	IsAtReverseEnd () const
	ITK_DEFAULT_COPY_AND_MOVE (ImageConstIteratorWithOnlyIndex)
	ITK_UNEQUAL_OPERATOR_MEMBER_FUNCTION (Self)
bool	operator< (const Self &it) const
bool	operator<= (const Self &it) const
bool	operator== (const Self &it) const
bool	operator> (const Self &it) const
bool	operator>= (const Self &it) const
bool	Remaining ()
void	SetIndex (const IndexType &ind)
virtual	~ImageConstIteratorWithOnlyIndex ()=default

Private Types
using	GeneratorPointer = typename Statistics::MersenneTwisterRandomVariateGenerator::Pointer

Private Member Functions
void	RandomJump ()

Private Attributes
GeneratorPointer	m_Generator { Statistics::MersenneTwisterRandomVariateGenerator::New() }
SizeValueType	m_NumberOfPixelsInRegion {}
SizeValueType	m_NumberOfSamplesDone {}
SizeValueType	m_NumberOfSamplesRequested {}

Additional Inherited Members
Static Public Member Functions inherited from itk::ImageConstIteratorWithOnlyIndex< TImage >
static constexpr unsigned int	GetImageDimension ()
Static Public Attributes inherited from itk::ImageConstIteratorWithOnlyIndex< TImage >
static constexpr unsigned int	ImageDimension = TImage::ImageDimension
Protected Attributes inherited from itk::ImageConstIteratorWithOnlyIndex< TImage >
IndexType	m_BeginIndex { { 0 } }
IndexType	m_EndIndex { { 0 } }
TImage::ConstPointer	m_Image {}
OffsetValueType	m_OffsetTable [ImageDimension+1] {}
IndexType	m_PositionIndex { { 0 } }
RegionType	m_Region {}
bool	m_Remaining { false }

Member Typedef Documentation

GeneratorPointer

template<typename TImage >

using itk::ImageRandomConstIteratorWithOnlyIndex< TImage >::GeneratorPointer = typename Statistics::MersenneTwisterRandomVariateGenerator::Pointer

private

Definition at line 239 of file itkImageRandomConstIteratorWithOnlyIndex.h.

ImageType

template<typename TImage >

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

Image type alias support

Definition at line 121 of file itkImageConstIteratorWithOnlyIndex.h.

IndexType

template<typename TImage >

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

Index type alias support

Definition at line 110 of file itkImageConstIteratorWithOnlyIndex.h.

IndexValueType

template<typename TImage >

using itk::ImageConstIteratorWithOnlyIndex< TImage >::IndexValueType = typename IndexType::IndexValueType

Definition at line 111 of file itkImageConstIteratorWithOnlyIndex.h.

OffsetType

template<typename TImage >

using itk::ImageConstIteratorWithOnlyIndex< TImage >::OffsetType = typename TImage::OffsetType

Type of the Offset taken from the image

Definition at line 124 of file itkImageConstIteratorWithOnlyIndex.h.

OffsetValueType

template<typename TImage >

using itk::ImageConstIteratorWithOnlyIndex< TImage >::OffsetValueType = typename OffsetType::OffsetValueType

Definition at line 125 of file itkImageConstIteratorWithOnlyIndex.h.

RegionType

template<typename TImage >

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

Region type alias support

Definition at line 118 of file itkImageConstIteratorWithOnlyIndex.h.

Self

template<typename TImage >

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

Standard class type aliases.

Definition at line 127 of file itkImageRandomConstIteratorWithOnlyIndex.h.

SizeType

template<typename TImage >

using itk::ImageConstIteratorWithOnlyIndex< TImage >::SizeType = typename TImage::SizeType

Size type alias support

Definition at line 114 of file itkImageConstIteratorWithOnlyIndex.h.

SizeValueType

template<typename TImage >

using itk::ImageConstIteratorWithOnlyIndex< TImage >::SizeValueType = typename SizeType::SizeValueType

Definition at line 115 of file itkImageConstIteratorWithOnlyIndex.h.

Superclass

template<typename TImage >

using itk::ImageRandomConstIteratorWithOnlyIndex< TImage >::Superclass = ImageConstIteratorWithOnlyIndex<TImage>

Definition at line 128 of file itkImageRandomConstIteratorWithOnlyIndex.h.

Constructor & Destructor Documentation

ImageRandomConstIteratorWithOnlyIndex() [1/3]

template<typename TImage >

itk::ImageRandomConstIteratorWithOnlyIndex< TImage >::ImageRandomConstIteratorWithOnlyIndex ( )

default

Default constructor. Needed since we provide a cast constructor.

~ImageRandomConstIteratorWithOnlyIndex()

template<typename TImage >

itk::ImageRandomConstIteratorWithOnlyIndex< TImage >::~ImageRandomConstIteratorWithOnlyIndex ( )

overridedefault

Default constructor. Needed since we provide a cast constructor.

ImageRandomConstIteratorWithOnlyIndex() [2/3]

template<typename TImage >

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

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

ImageRandomConstIteratorWithOnlyIndex() [3/3]

template<typename TImage >

itk::ImageRandomConstIteratorWithOnlyIndex< TImage >::ImageRandomConstIteratorWithOnlyIndex ( const ImageConstIteratorWithOnlyIndex< TImage > &  it )

inline

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

Definition at line 155 of file itkImageRandomConstIteratorWithOnlyIndex.h.

Member Function Documentation

GetNumberOfSamples()

template<typename TImage >

SizeValueType itk::ImageRandomConstIteratorWithOnlyIndex< TImage >::GetNumberOfSamples ( ) const

inline

Definition at line 222 of file itkImageRandomConstIteratorWithOnlyIndex.h.

GoToBegin()

template<typename TImage >

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

inline

Move an iterator to the beginning of the region.

Definition at line 162 of file itkImageRandomConstIteratorWithOnlyIndex.h.

GoToEnd()

template<typename TImage >

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

inline

Move an iterator to one position past the End of the region.

Definition at line 171 of file itkImageRandomConstIteratorWithOnlyIndex.h.

IsAtBegin()

template<typename TImage >

bool itk::ImageRandomConstIteratorWithOnlyIndex< TImage >::IsAtBegin ( ) const

inline

Is the iterator at the beginning of the region?

Definition at line 180 of file itkImageRandomConstIteratorWithOnlyIndex.h.

IsAtEnd()

template<typename TImage >

bool itk::ImageRandomConstIteratorWithOnlyIndex< TImage >::IsAtEnd ( ) const

inline

Is the iterator at the end of the region?

Definition at line 187 of file itkImageRandomConstIteratorWithOnlyIndex.h.

operator++()

template<typename TImage >

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

inline

Increment (prefix) the selected dimension. No bounds checking is performed.

See also

GetIndex

operator--

Definition at line 195 of file itkImageRandomConstIteratorWithOnlyIndex.h.

operator--()

template<typename TImage >

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

inline

Decrement (prefix) the selected dimension. No bounds checking is performed.

See also

GetIndex

operator++

Definition at line 206 of file itkImageRandomConstIteratorWithOnlyIndex.h.

RandomJump()

template<typename TImage >

void itk::ImageRandomConstIteratorWithOnlyIndex< TImage >::RandomJump ( )

private

Execute a random jump.

ReinitializeSeed() [1/2]

template<typename TImage >

void itk::ImageRandomConstIteratorWithOnlyIndex< TImage >::ReinitializeSeed

(

)

Reinitialize the seed of the random number generator.

ReinitializeSeed() [2/2]

template<typename TImage >

void itk::ImageRandomConstIteratorWithOnlyIndex< TImage >::ReinitializeSeed

(

int

)

SetNumberOfSamples()

template<typename TImage >

void itk::ImageRandomConstIteratorWithOnlyIndex< TImage >::SetNumberOfSamples ( SizeValueType  number )

inline

Set/Get number of random samples to extract from the image region.

Definition at line 216 of file itkImageRandomConstIteratorWithOnlyIndex.h.

Member Data Documentation

m_Generator

template<typename TImage >

GeneratorPointer itk::ImageRandomConstIteratorWithOnlyIndex< TImage >::m_Generator { Statistics::MersenneTwisterRandomVariateGenerator::New() }

private

Definition at line 240 of file itkImageRandomConstIteratorWithOnlyIndex.h.

m_NumberOfPixelsInRegion

template<typename TImage >

SizeValueType itk::ImageRandomConstIteratorWithOnlyIndex< TImage >::m_NumberOfPixelsInRegion {}

private

Definition at line 243 of file itkImageRandomConstIteratorWithOnlyIndex.h.

m_NumberOfSamplesDone

template<typename TImage >

SizeValueType itk::ImageRandomConstIteratorWithOnlyIndex< TImage >::m_NumberOfSamplesDone {}

private

Definition at line 242 of file itkImageRandomConstIteratorWithOnlyIndex.h.

m_NumberOfSamplesRequested

template<typename TImage >

SizeValueType itk::ImageRandomConstIteratorWithOnlyIndex< TImage >::m_NumberOfSamplesRequested {}

private

Definition at line 241 of file itkImageRandomConstIteratorWithOnlyIndex.h.

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The documentation for this class was generated from the following file:

• itkImageRandomConstIteratorWithOnlyIndex.h