itk::ShrinkImageFilter< TInputImage, TOutputImage > Class Template Reference
[Geometric Transformation Filters]

Reduce the size of an image by an integer factor in each dimension. More...

#include <itkShrinkImageFilter.h>

Inheritance diagram for itk::ShrinkImageFilter:

[legend]Collaboration diagram for itk::ShrinkImageFilter< TInputImage, TOutputImage >:

[legend]List of all members.

Public Types
typedef ShrinkImageFilter	Self
typedef ImageToImageFilter< TInputImage, TOutputImage >	Superclass
typedef SmartPointer< Self >	Pointer
typedef SmartPointer< const Self >	ConstPointer
typedef TOutputImage	OutputImageType
typedef TInputImage	InputImageType
typedef OutputImageType::Pointer	OutputImagePointer
typedef InputImageType::Pointer	InputImagePointer
typedef InputImageType::ConstPointer	InputImageConstPointer
typedef TOutputImage::RegionType	OutputImageRegionType
Public Methods
virtual const char *	GetClassName () const
	itkStaticConstMacro (ImageDimension, unsigned int, TInputImage::ImageDimension)
const unsigned int *	GetShrinkFactors () const
virtual void	GenerateOutputInformation ()
virtual void	GenerateInputRequestedRegion ()
void	SetShrinkFactors (unsigned int factors[])
void	SetShrinkFactors (unsigned int factor)
void	SetShrinkFactor (unsigned int i, unsigned int factor)
Static Public Methods
Pointer	New ()
Protected Methods
	ShrinkImageFilter ()
	~ShrinkImageFilter ()
void	PrintSelf (std::ostream &os, Indent indent) const
void	ThreadedGenerateData (const OutputImageRegionType &outputRegionForThread, int threadId)

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Detailed Description

template<class TInputImage, class TOutputImage>
class itk::ShrinkImageFilter< TInputImage, TOutputImage >

Reduce the size of an image by an integer factor in each dimension.

ShrinkImageFilter reduces the size of an image by an integer factor in each dimension. The algorithm implemented is a simple subsample. The output image size in each dimension is given by:

outputSize[j] = max( floor(inputSize[j]/shrinkFactor[j]), 1 );

Since this filter produces an image which is a different resolution and with different pixel spacing than its input image, it needs to override several of the methods defined in ProcessObject in order to properly manage the pipeline execution model. In particular, this filter overrides ProcessObject::GenerateInputRequestedRegion() and ProcessObject::GenerateOutputInformation().

This filter is implemented as a multithreaded filter. It provides a ThreadedGenerateData() method for its implementation.

Definition at line 52 of file itkShrinkImageFilter.h.

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Member Typedef Documentation

template<class TInputImage, class TOutputImage> typedef SmartPointer<const Self> itk::ShrinkImageFilter< TInputImage, TOutputImage >::ConstPointer

Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 60 of file itkShrinkImageFilter.h.

template<class TInputImage, class TOutputImage> typedef InputImageType::ConstPointer itk::ShrinkImageFilter< TInputImage, TOutputImage >::InputImageConstPointer

Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 73 of file itkShrinkImageFilter.h.

template<class TInputImage, class TOutputImage> typedef InputImageType::Pointer itk::ShrinkImageFilter< TInputImage, TOutputImage >::InputImagePointer

Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 72 of file itkShrinkImageFilter.h.

template<class TInputImage, class TOutputImage> typedef TInputImage itk::ShrinkImageFilter< TInputImage, TOutputImage >::InputImageType

Some convenient typedefs. Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 70 of file itkShrinkImageFilter.h.

template<class TInputImage, class TOutputImage> typedef OutputImageType::Pointer itk::ShrinkImageFilter< TInputImage, TOutputImage >::OutputImagePointer

Reimplemented from itk::ImageSource< TOutputImage >. Definition at line 71 of file itkShrinkImageFilter.h.

template<class TInputImage, class TOutputImage> typedef TOutputImage::RegionType itk::ShrinkImageFilter< TInputImage, TOutputImage >::OutputImageRegionType

Typedef to describe the output image region type. Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 76 of file itkShrinkImageFilter.h.

template<class TInputImage, class TOutputImage> typedef TOutputImage itk::ShrinkImageFilter< TInputImage, TOutputImage >::OutputImageType

Typedef to images Reimplemented from itk::ImageSource< TOutputImage >. Definition at line 69 of file itkShrinkImageFilter.h.

template<class TInputImage, class TOutputImage> typedef SmartPointer<Self> itk::ShrinkImageFilter< TInputImage, TOutputImage >::Pointer

Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 59 of file itkShrinkImageFilter.h.

template<class TInputImage, class TOutputImage> typedef ShrinkImageFilter itk::ShrinkImageFilter< TInputImage, TOutputImage >::Self

Standard class typedefs. Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 57 of file itkShrinkImageFilter.h.

template<class TInputImage, class TOutputImage> typedef ImageToImageFilter<TInputImage,TOutputImage> itk::ShrinkImageFilter< TInputImage, TOutputImage >::Superclass

Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 58 of file itkShrinkImageFilter.h.

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Constructor & Destructor Documentation

template<class TInputImage, class TOutputImage> itk::ShrinkImageFilter< TInputImage, TOutputImage >::ShrinkImageFilter (    )  [protected]

template<class TInputImage, class TOutputImage> itk::ShrinkImageFilter< TInputImage, TOutputImage >::~ShrinkImageFilter (    )  [inline, protected]

Definition at line 114 of file itkShrinkImageFilter.h. References HardConnectedComponentImageFilter::PrintSelf().

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Member Function Documentation

template<class TInputImage, class TOutputImage> virtual void itk::ShrinkImageFilter< TInputImage, TOutputImage >::GenerateInputRequestedRegion (    )  [virtual]

ShrinkImageFilter needs a larger input requested region than the output requested region. As such, ShrinkImageFilter needs to provide an implementation for GenerateInputRequestedRegion() in order to inform the pipeline execution model. See also: ProcessObject::GenerateInputRequestedRegion() Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >.

template<class TInputImage, class TOutputImage> virtual void itk::ShrinkImageFilter< TInputImage, TOutputImage >::GenerateOutputInformation (    )  [virtual]

ShrinkImageFilter produces an image which is a different resolution and with a different pixel spacing than its input image. As such, ShrinkImageFilter needs to provide an implementation for GenerateOutputInformation() in order to inform the pipeline execution model. The original documentation of this method is below. See also: ProcessObject::GenerateOutputInformaton() Reimplemented from itk::ProcessObject.

template<class TInputImage, class TOutputImage> virtual const char* itk::ShrinkImageFilter< TInputImage, TOutputImage >::GetClassName (    )  const [virtual]

Run-time type information (and related methods). Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >.

template<class TInputImage, class TOutputImage> const unsigned int* itk::ShrinkImageFilter< TInputImage, TOutputImage >::GetShrinkFactors (    )  const [inline]

Get the shrink factors. Definition at line 93 of file itkShrinkImageFilter.h.

template<class TInputImage, class TOutputImage> itk::ShrinkImageFilter< TInputImage, TOutputImage >::itkStaticConstMacro (  ImageDimension   , unsigned    int, TInputImage::ImageDimension    )

ImageDimension enumeration. Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >.

template<class TInputImage, class TOutputImage> Pointer itk::ShrinkImageFilter< TInputImage, TOutputImage >::New (    )  [static]

Method for creation through the object factory. Reimplemented from itk::Object.

template<class TInputImage, class TOutputImage> void itk::ShrinkImageFilter< TInputImage, TOutputImage >::PrintSelf (  std::ostream &    os, Indent    indent )  const [protected, virtual]

Methods invoked by Print() to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes. Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >.

template<class TInputImage, class TOutputImage> void itk::ShrinkImageFilter< TInputImage, TOutputImage >::SetShrinkFactor (  unsigned int    i, unsigned int    factor )  [inline]

Set the shrink factors. Values are clamped to a minimum value of 1. Default is 1 for all dimensions. Definition at line 86 of file itkShrinkImageFilter.h.

template<class TInputImage, class TOutputImage> void itk::ShrinkImageFilter< TInputImage, TOutputImage >::SetShrinkFactors (  unsigned int    factor )

Set the shrink factors. Values are clamped to a minimum value of 1. Default is 1 for all dimensions.

template<class TInputImage, class TOutputImage> void itk::ShrinkImageFilter< TInputImage, TOutputImage >::SetShrinkFactors (  unsigned int    factors[] )

Set the shrink factors. Values are clamped to a minimum value of 1. Default is 1 for all dimensions.

template<class TInputImage, class TOutputImage> void itk::ShrinkImageFilter< TInputImage, TOutputImage >::ThreadedGenerateData (  const OutputImageRegionType &    outputRegionForThread, int    threadId )  [protected, virtual]

ShrinkImageFilter can be implemented as a multithreaded filter. Therefore, this implementation provides a ThreadedGenerateData() routine which is called for each processing thread. The output image data is allocated automatically by the superclass prior to calling ThreadedGenerateData(). ThreadedGenerateData can only write to the portion of the output image specified by the parameter "outputRegionForThread" See also: ImageToImageFilter::ThreadedGenerateData(), ImageToImageFilter::GenerateData() Reimplemented from itk::ImageSource< TOutputImage >.

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

• itkShrinkImageFilter.h

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