#include <itkImageRandomConstIteratorWithIndex.h>

Inheritance diagram for itk::ImageRandomConstIteratorWithIndex< TImage >:

Collaboration diagram for itk::ImageRandomConstIteratorWithIndex< TImage >:

Public Types
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 Superclass::PixelContainerPointer	PixelContainerPointer
typedef Superclass::PixelType	PixelType
typedef Superclass::RegionType	RegionType
typedef ImageRandomConstIteratorWithIndex	Self
typedef Superclass::SizeType	SizeType
typedef Superclass::SizeValueType	SizeValueType
typedef ImageConstIteratorWithIndex < TImage >	Superclass
Public Types inherited from itk::ImageConstIteratorWithIndex< TImage >
typedef TImage::AccessorFunctorType	AccessorFunctorType

Public Member Functions
SizeValueType	GetNumberOfSamples (void) const
	ImageRandomConstIteratorWithIndex ()
	ImageRandomConstIteratorWithIndex (const ImageType *ptr, const RegionType &region)
	ImageRandomConstIteratorWithIndex (const ImageConstIteratorWithIndex< TImage > &it)
bool	IsAtBegin (void) const
bool	IsAtEnd (void) const
void	ReinitializeSeed ()
void	ReinitializeSeed (int)
void	SetNumberOfSamples (SizeValueType number)
	~ImageRandomConstIteratorWithIndex ()

void	GoToBegin (void)

void	GoToEnd (void)

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	GoToReverseBegin (void)
	ImageConstIteratorWithIndex ()
	ImageConstIteratorWithIndex (const Self &it)
	ImageConstIteratorWithIndex (const TImage *ptr, const RegionType &region)
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 Types
typedef Statistics::MersenneTwisterRandomVariateGenerator::Pointer	GeneratorPointer

Private Member Functions
void	RandomJump ()

Private Attributes
GeneratorPointer	m_Generator
SizeValueType	m_NumberOfPixelsInRegion
SizeValueType	m_NumberOfSamplesDone
SizeValueType	m_NumberOfSamplesRequested

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

Detailed Description

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

A multi-dimensional image iterator that visits a random set of pixels within an image region.

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

ImageRandomConstIteratorWithIndex 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 samples from the image.

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

 ImageRandomConstIteratorWithIndex<ImageType> it( image, image->GetRequestedRegion() );
 it.SetNumberOfSamples(200);
 it.GoToBegin();
 while( !it.IsAtEnd() )
 {
   it.Get();
   ++it;  // here it jumps to another random position inside the region
  }

or

 ImageRandomConstIteratorWithIndex<ImageType> it( image, image->GetRequestedRegion() );
 it.SetNumberOfSamples(200);
 it.GoToEnd();
 while( !it.IsAtBegin() )
 {
   it.Get();
   --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 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

Wiki Examples:

All Examples

Randomly select pixels from a region of an image

Definition at line 116 of file itkImageRandomConstIteratorWithIndex.h.

Member Typedef Documentation

template<typename TImage>

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

Accessor type that converts data between internal and external representations.

Reimplemented from itk::ImageConstIteratorWithIndex< TImage >.

Reimplemented in itk::ImageRandomIteratorWithIndex< TImage >.

Definition at line 133 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage>

typedef Statistics::MersenneTwisterRandomVariateGenerator::Pointer itk::ImageRandomConstIteratorWithIndex< TImage >::GeneratorPointer

private

Definition at line 218 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage>

typedef Superclass::ImageType itk::ImageRandomConstIteratorWithIndex< TImage >::ImageType

Image typedef support.

Reimplemented from itk::ImageConstIteratorWithIndex< TImage >.

Reimplemented in itk::ImageRandomIteratorWithIndex< TImage >.

Definition at line 128 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage>

typedef Superclass::IndexType itk::ImageRandomConstIteratorWithIndex< TImage >::IndexType

Inherit types from the superclass

Reimplemented from itk::ImageConstIteratorWithIndex< TImage >.

Reimplemented in itk::ImageRandomIteratorWithIndex< TImage >.

Definition at line 124 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage>

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

Reimplemented from itk::ImageConstIteratorWithIndex< TImage >.

Definition at line 134 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage>

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

Internal Pixel Type

Reimplemented from itk::ImageConstIteratorWithIndex< TImage >.

Reimplemented in itk::ImageRandomIteratorWithIndex< TImage >.

Definition at line 131 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage>

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

Type of the Offset taken from the image

Reimplemented from itk::ImageConstIteratorWithIndex< TImage >.

Reimplemented in itk::ImageRandomIteratorWithIndex< TImage >.

Definition at line 126 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage>

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

Reimplemented from itk::ImageConstIteratorWithIndex< TImage >.

Definition at line 135 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage>

typedef Superclass::PixelContainer itk::ImageRandomConstIteratorWithIndex< 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::ImageConstIteratorWithIndex< TImage >.

Reimplemented in itk::ImageRandomIteratorWithIndex< TImage >.

Definition at line 129 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage>

typedef Superclass::PixelContainerPointer itk::ImageRandomConstIteratorWithIndex< TImage >::PixelContainerPointer

Reimplemented from itk::ImageConstIteratorWithIndex< TImage >.

Reimplemented in itk::ImageRandomIteratorWithIndex< TImage >.

Definition at line 130 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage>

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

External Pixel Type

Reimplemented from itk::ImageConstIteratorWithIndex< TImage >.

Reimplemented in itk::ImageRandomIteratorWithIndex< TImage >.

Definition at line 132 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage>

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

Region typedef support.

Reimplemented from itk::ImageConstIteratorWithIndex< TImage >.

Reimplemented in itk::ImageRandomIteratorWithIndex< TImage >.

Definition at line 127 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage>

typedef ImageRandomConstIteratorWithIndex itk::ImageRandomConstIteratorWithIndex< TImage >::Self

Standard class typedefs.

Reimplemented from itk::ImageConstIteratorWithIndex< TImage >.

Reimplemented in itk::ImageRandomIteratorWithIndex< TImage >.

Definition at line 120 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage>

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

Size typedef support.

Reimplemented from itk::ImageConstIteratorWithIndex< TImage >.

Reimplemented in itk::ImageRandomIteratorWithIndex< TImage >.

Definition at line 125 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage>

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

Reimplemented from itk::ImageConstIteratorWithIndex< TImage >.

Definition at line 136 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage>

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

Reimplemented in itk::ImageRandomIteratorWithIndex< TImage >.

Definition at line 121 of file itkImageRandomConstIteratorWithIndex.h.

Constructor & Destructor Documentation

template<typename TImage>

itk::ImageRandomConstIteratorWithIndex< TImage >::ImageRandomConstIteratorWithIndex ( )

Default constructor. Needed since we provide a cast constructor.

template<typename TImage>

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

inline

Definition at line 140 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage>

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

inline

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

Definition at line 152 of file itkImageRandomConstIteratorWithIndex.h.