itk::ImageRandomConstIteratorWithIndex< TImage > Class Template Reference
[Image Iterators]

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

#include <itkImageRandomConstIteratorWithIndex.h>

Inheritance diagram for itk::ImageRandomConstIteratorWithIndex< TImage >:

[legend]Collaboration diagram for itk::ImageRandomConstIteratorWithIndex< TImage >:

[legend]List of all members.

Public Types
typedef ImageRandomConstIteratorWithIndex	Self
typedef ImageConstIteratorWithIndex< TImage >	Superclass
typedef TImage::IndexType	IndexType
typedef TImage::RegionType	RegionType
typedef TImage	ImageType
typedef TImage::PixelContainer	PixelContainer
typedef PixelContainer::Pointer	PixelContainerPointer
Public Member Functions
	ImageRandomConstIteratorWithIndex (const ImageType *ptr, const RegionType &region)
	ImageRandomConstIteratorWithIndex (const ImageConstIteratorWithIndex< TImage > &it)
bool	IsAtBegin (void) const
bool	IsAtEnd (void) const
	ImageRandomConstIteratorWithIndex ()
	~ImageRandomConstIteratorWithIndex ()
void	GoToBegin (void)
void	GoToEnd (void)
Self &	operator++ ()
Self &	operator-- ()
void	SetNumberOfSamples (unsigned long number)
unsigned long	GetNumberOfSamples (void) const
void	ReinitializeSeed ()
void	ReinitializeSeed (int)

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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.

Examples/itkImageRandomConstIteratorWithIndex.cxx

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 113 of file itkImageRandomConstIteratorWithIndex.h.

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Member Typedef Documentation

template<typename TImage> typedef TImage itk::ImageRandomConstIteratorWithIndex< 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 to that is it not confused with ImageIterator::Index. Reimplemented from itk::ImageConstIteratorWithIndex< TImage >. Reimplemented in itk::ImageRandomIteratorWithIndex< TImage >. Definition at line 136 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage> typedef TImage::IndexType itk::ImageRandomConstIteratorWithIndex< 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 to that is it not confused with ImageIterator::Index. Reimplemented from itk::ImageConstIteratorWithIndex< TImage >. Reimplemented in itk::ImageRandomIteratorWithIndex< TImage >. Definition at line 124 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage> typedef TImage::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 141 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage> typedef PixelContainer::Pointer itk::ImageRandomConstIteratorWithIndex< TImage >::PixelContainerPointer

Reimplemented from itk::ImageConstIteratorWithIndex< TImage >. Reimplemented in itk::ImageRandomIteratorWithIndex< TImage >. Definition at line 142 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage> typedef TImage::RegionType itk::ImageRandomConstIteratorWithIndex< 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 is it not confused with ImageIterator::Index. Reimplemented from itk::ImageConstIteratorWithIndex< TImage >. Reimplemented in itk::ImageRandomIteratorWithIndex< TImage >. Definition at line 130 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 117 of file itkImageRandomConstIteratorWithIndex.h.

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

Reimplemented in itk::ImageRandomIteratorWithIndex< TImage >. Definition at line 118 of file itkImageRandomConstIteratorWithIndex.h.

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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]

Default constructor. Needed since we provide a cast constructor. Definition at line 146 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 159 of file itkImageRandomConstIteratorWithIndex.h.

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Member Function Documentation

template<typename TImage> unsigned long itk::ImageRandomConstIteratorWithIndex< TImage >::GetNumberOfSamples (  void   )  const

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

template<typename TImage> void itk::ImageRandomConstIteratorWithIndex< TImage >::GoToBegin (  void   )  [inline]

Move an iterator to the beginning of the region. Reimplemented from itk::ImageConstIteratorWithIndex< TImage >. Definition at line 163 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage> void itk::ImageRandomConstIteratorWithIndex< TImage >::GoToEnd (  void   )  [inline]

Move an iterator to one position past the End of the region. Definition at line 171 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage> bool itk::ImageRandomConstIteratorWithIndex< TImage >::IsAtBegin (  void   )  const [inline]

Is the iterator at the beginning of the region? Definition at line 179 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage> bool itk::ImageRandomConstIteratorWithIndex< TImage >::IsAtEnd (  void   )  const [inline]

Is the iterator at the end of the region? Reimplemented from itk::ImageConstIteratorWithIndex< TImage >. Definition at line 183 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage> Self& itk::ImageRandomConstIteratorWithIndex< TImage >::operator++ (   )  [inline]

Increment (prefix) the selected dimension. No bounds checking is performed. See also: GetIndex operator-- Definition at line 188 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage> Self& itk::ImageRandomConstIteratorWithIndex< TImage >::operator-- (   )  [inline]

Decrement (prefix) the selected dimension. No bounds checking is performed. See also: GetIndex operator++ Definition at line 198 of file itkImageRandomConstIteratorWithIndex.h.

template<typename TImage> void itk::ImageRandomConstIteratorWithIndex< TImage >::ReinitializeSeed (  int   )

Reinitialize the seed of the random number generator

template<typename TImage> void itk::ImageRandomConstIteratorWithIndex< TImage >::ReinitializeSeed (   )

Reinitialize the seed of the random number generator

template<typename TImage> void itk::ImageRandomConstIteratorWithIndex< TImage >::SetNumberOfSamples (  unsigned long  number  )

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

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

• itkImageRandomConstIteratorWithIndex.h

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