itk::DoubleThresholdImageFilter< TInputImage, TOutputImage > Class Template Reference
[Image Enhancement Filters, Mathematical Morphology Image Filters]

Binarize an input image using double thresholding. More...

#include <itkDoubleThresholdImageFilter.h>

Inheritance diagram for itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >:

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

[legend]List of all members.

Public Types
typedef DoubleThresholdImageFilter	Self
typedef ImageToImageFilter< TInputImage, TOutputImage >	Superclass
typedef SmartPointer< Self >	Pointer
typedef SmartPointer< const Self >	ConstPointer
typedef Superclass::InputImagePointer	InputImagePointer
typedef Superclass::InputImageType	InputImageType
typedef TInputImage::PixelType	InputPixelType
typedef TOutputImage::PixelType	OutputPixelType
enum	{ PixelTypeComparable = 0 }
Public Member Functions
virtual const char *	GetClassName () const
virtual void	SetOutsideValue (OutputPixelType _arg)
virtual OutputPixelType	GetOutsideValue ()
virtual void	SetInsideValue (OutputPixelType _arg)
virtual OutputPixelType	GetInsideValue ()
virtual unsigned long	GetNumberOfIterationsUsed ()
virtual void	SetThreshold1 (InputPixelType _arg)
virtual void	SetThreshold2 (InputPixelType _arg)
virtual void	SetThreshold3 (InputPixelType _arg)
virtual void	SetThreshold4 (InputPixelType _arg)
virtual InputPixelType	GetThreshold1 ()
virtual InputPixelType	GetThreshold2 ()
virtual InputPixelType	GetThreshold3 ()
virtual InputPixelType	GetThreshold4 ()
Static Public Member Functions
Pointer	New ()
Protected Member Functions
	DoubleThresholdImageFilter ()
virtual	~DoubleThresholdImageFilter ()
void	PrintSelf (std::ostream &os, Indent indent) const
void	GenerateInputRequestedRegion ()
void	EnlargeOutputRequestedRegion (DataObject *)
void	GenerateData ()

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Detailed Description

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

Binarize an input image using double thresholding.

Double threshold addresses the difficulty in selecting a threshold that will select the objects of interest without selecting extraneous objects. Double threshold considers two threshold ranges: a narrow range and a wide range (where the wide range encompasses the narrow range). If the wide range was used for a traditional threshold (where values inside the range map to the foreground and values outside the range map to the background), many extraneous pixels may survive the threshold operation. If the narrow range was used for a traditional threshold, then too few pixels may survive the threshold.

Double threshold uses the narrow threshold image as a marker image and the wide threshold image as a mask image in the geodesic dilation. Essentially, the marker image (narrow threshold) is dilated but constrained to lie within the mask image (wide threshold). Thus, only the objects of interest (those pixels that survived the narrow threshold) are extracted but the those objects appear in the final image as they would have if the wide threshold was used.

See also:

GrayscaleGeodesicDilateImageFilter

MorphologyImageFilter, GrayscaleDilateImageFilter, GrayscaleFunctionDilateImageFilter, BinaryDilateImageFilter

Definition at line 54 of file itkDoubleThresholdImageFilter.h.

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Member Typedef Documentation

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

Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 62 of file itkDoubleThresholdImageFilter.h.

template<class TInputImage, class TOutputImage> typedef Superclass::InputImagePointer itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::InputImagePointer

Types from the superclass Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 71 of file itkDoubleThresholdImageFilter.h.

template<class TInputImage, class TOutputImage> typedef Superclass::InputImageType itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::InputImageType

Some convenient typedefs. Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 72 of file itkDoubleThresholdImageFilter.h.

template<class TInputImage, class TOutputImage> typedef TInputImage::PixelType itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::InputPixelType

Pixel types. Definition at line 75 of file itkDoubleThresholdImageFilter.h. Referenced by itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::~DoubleThresholdImageFilter().

template<class TInputImage, class TOutputImage> typedef TOutputImage::PixelType itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::OutputPixelType

Definition at line 76 of file itkDoubleThresholdImageFilter.h. Referenced by itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::~DoubleThresholdImageFilter().

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

Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 61 of file itkDoubleThresholdImageFilter.h.

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

Standard class typedefs. Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 59 of file itkDoubleThresholdImageFilter.h. Referenced by itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::~DoubleThresholdImageFilter().

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

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

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Member Enumeration Documentation

template<class TInputImage, class TOutputImage> anonymous enum

The input pixel type must support comparison operators. Enumeration values: PixelTypeComparable  Definition at line 79 of file itkDoubleThresholdImageFilter.h.

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Constructor & Destructor Documentation

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

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

Definition at line 119 of file itkDoubleThresholdImageFilter.h. References itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::InputPixelType, itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::OutputPixelType, and itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::Self.

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Member Function Documentation

template<class TInputImage, class TOutputImage> void itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::EnlargeOutputRequestedRegion (  DataObject *   )  [protected, virtual]

DoubleThresholdImageFilter produces all of the output and must provide an implementation of EnlargeOutputRequestedRegion() Reimplemented from itk::ProcessObject.

template<class TInputImage, class TOutputImage> void itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::GenerateData (   )  [protected, virtual]

Single threaded version of GenerateData(). DoubleThresholdImageFilter delegates its implementation to the GrayscaleGeodesicDilateImageFilter. Reimplemented from itk::ImageSource< TOutputImage >.

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

DoubleThresholdImageFilter needs all of the input. So it must provide an implementation of GenerateInputRequestedRegion() Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >.

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

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

template<class TInputImage, class TOutputImage> virtual OutputPixelType itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::GetInsideValue (   )  [virtual]

Get the "inside" pixel value.

template<class TInputImage, class TOutputImage> virtual unsigned long itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::GetNumberOfIterationsUsed (   )  [virtual]

Get the number of iterations used by the geodesic dilation to produce the current output.

template<class TInputImage, class TOutputImage> virtual OutputPixelType itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::GetOutsideValue (   )  [virtual]

Get the "outside" pixel value.

template<class TInputImage, class TOutputImage> virtual InputPixelType itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::GetThreshold1 (   )  [virtual]

Get the threshold values.

template<class TInputImage, class TOutputImage> virtual InputPixelType itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::GetThreshold2 (   )  [virtual]

Get the threshold values.

template<class TInputImage, class TOutputImage> virtual InputPixelType itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::GetThreshold3 (   )  [virtual]

Get the threshold values.

template<class TInputImage, class TOutputImage> virtual InputPixelType itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::GetThreshold4 (   )  [virtual]

Get the threshold values.

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

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

template<class TInputImage, class TOutputImage> void itk::DoubleThresholdImageFilter< 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> virtual void itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::SetInsideValue (  OutputPixelType  _arg  )  [virtual]

Set the "inside" pixel value. The default value NumericTraits<OutputPixelType>::max()

template<class TInputImage, class TOutputImage> virtual void itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::SetOutsideValue (  OutputPixelType  _arg  )  [virtual]

Set the "outside" pixel value. The default value NumericTraits<OutputPixelType>::Zero.

template<class TInputImage, class TOutputImage> virtual void itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::SetThreshold1 (  InputPixelType  _arg  )  [virtual]

Set the thresholds. Four thresholds should be specified. The two lower thresholds default to NumericTraits<InputPixelType>::NonpositiveMin(). The two upper thresholds default NumericTraits<InputPixelType>::max. Threshold1 <= Threshold2 <= Threshold3 <= Threshold4.

template<class TInputImage, class TOutputImage> virtual void itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::SetThreshold2 (  InputPixelType  _arg  )  [virtual]

Set the thresholds. Four thresholds should be specified. The two lower thresholds default to NumericTraits<InputPixelType>::NonpositiveMin(). The two upper thresholds default NumericTraits<InputPixelType>::max. Threshold1 <= Threshold2 <= Threshold3 <= Threshold4.

template<class TInputImage, class TOutputImage> virtual void itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::SetThreshold3 (  InputPixelType  _arg  )  [virtual]

Set the thresholds. Four thresholds should be specified. The two lower thresholds default to NumericTraits<InputPixelType>::NonpositiveMin(). The two upper thresholds default NumericTraits<InputPixelType>::max. Threshold1 <= Threshold2 <= Threshold3 <= Threshold4.

template<class TInputImage, class TOutputImage> virtual void itk::DoubleThresholdImageFilter< TInputImage, TOutputImage >::SetThreshold4 (  InputPixelType  _arg  )  [virtual]

Set the thresholds. Four thresholds should be specified. The two lower thresholds default to NumericTraits<InputPixelType>::NonpositiveMin(). The two upper thresholds default NumericTraits<InputPixelType>::max. Threshold1 <= Threshold2 <= Threshold3 <= Threshold4.

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

• itkDoubleThresholdImageFilter.h

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