itk::SobelEdgeDetectionImageFilter< TInputImage, TOutputImage > Class Template Reference
[Image Feature Extraction Filters]

Implements the Sobel Edge Detection.The Sobel operator performs a 2D/ND spatial gradient measurement on an image and so emphasizes regions of high spatial gradient that correspond to edges. Typically it is used to find the approximate absolute gradient magnitude at each point in an input greyscale image. More...

#include <itkSobelEdgeDetectionImageFilter.h>

Inheritance diagram for itk::SobelEdgeDetectionImageFilter:

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

[legend]List of all members.

Public Types
typedef SobelEdgeDetectionImageFilter	Self
typedef ImageToImageFilter< TInputImage, TOutputImage >	Superclass
typedef TOutputImage::PixelType	OutputPixelType
typedef TOutputImage::InternalPixelType	OutputInternalPixelType
typedef TInputImage::PixelType	InputPixelType
typedef TInputImage::InternalPixelType	InputInternalPixelType
typedef TInputImage	InputImageType
typedef TOutputImage	OutputImageType
typedef InputImageType::Pointer	InputImagePointer
typedef SmartPointer< Self >	Pointer
typedef SmartPointer< const Self >	ConstPointer
Public Methods
	itkStaticConstMacro (ImageDimension, unsigned int, TOutputImage::ImageDimension)
virtual const char *	GetClassName () const
virtual void	GenerateInputRequestedRegion () throw (InvalidRequestedRegionError)
Static Public Methods
Pointer	New ()
Protected Methods
	SobelEdgeDetectionImageFilter ()
virtual	~SobelEdgeDetectionImageFilter ()
	SobelEdgeDetectionImageFilter (const Self &)
void	GenerateData ()
void	PrintSelf (std::ostream &os, Indent indent) const

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Detailed Description

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

Implements the Sobel Edge Detection.The Sobel operator performs a 2D/ND spatial gradient measurement on an image and so emphasizes regions of high spatial gradient that correspond to edges. Typically it is used to find the approximate absolute gradient magnitude at each point in an input greyscale image.

In this filter, the Sobel operator is first applied to each direction just like calculating the derivative image filters. then the the gradient magnitude is calculated, which indicates where the edges are.

See also:

ImageToImageFilter , SobelOperator , Neighborhood , NeighborhoodOperator , NeighborhoodIterator

Definition at line 47 of file itkSobelEdgeDetectionImageFilter.h.

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Member Typedef Documentation

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

Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 79 of file itkSobelEdgeDetectionImageFilter.h.

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

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

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

Image typedef support Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 71 of file itkSobelEdgeDetectionImageFilter.h.

template<class TInputImage, class TOutputImage> typedef TInputImage::InternalPixelType itk::SobelEdgeDetectionImageFilter< TInputImage, TOutputImage >::InputInternalPixelType

Definition at line 64 of file itkSobelEdgeDetectionImageFilter.h.

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

Definition at line 63 of file itkSobelEdgeDetectionImageFilter.h.

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

Some convenient typedefs. Reimplemented from itk::ImageSource< TOutputImage >. Definition at line 72 of file itkSobelEdgeDetectionImageFilter.h.

template<class TInputImage, class TOutputImage> typedef TOutputImage::InternalPixelType itk::SobelEdgeDetectionImageFilter< TInputImage, TOutputImage >::OutputInternalPixelType

Definition at line 62 of file itkSobelEdgeDetectionImageFilter.h.

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

Extract some information from the image types. Dimensionality of the two images is assumed to be the same. Definition at line 61 of file itkSobelEdgeDetectionImageFilter.h.

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

Smart pointer typedef support Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 78 of file itkSobelEdgeDetectionImageFilter.h.

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

Standard "Self" & Superclass typedef. Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 54 of file itkSobelEdgeDetectionImageFilter.h.

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

Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 55 of file itkSobelEdgeDetectionImageFilter.h.

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Constructor & Destructor Documentation

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

Definition at line 103 of file itkSobelEdgeDetectionImageFilter.h.

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

Definition at line 104 of file itkSobelEdgeDetectionImageFilter.h.

template<class TInputImage, class TOutputImage> itk::SobelEdgeDetectionImageFilter< TInputImage, TOutputImage >::SobelEdgeDetectionImageFilter (  const Self &    )  [inline, protected]

Definition at line 105 of file itkSobelEdgeDetectionImageFilter.h.

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Member Function Documentation

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

Standard pipeline method. While this class does not implement a ThreadedGenerateData(), its GenerateData() delegates all calculations to an NeighborhoodOperatorImageFilter. Since the NeighborhoodOperatorImageFilter is multithreaded, this filter is multithreaded by default. Reimplemented from itk::ImageSource< TOutputImage >.

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

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

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

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

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

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

Method for creation through the object factory. Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >.

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

Standard pipeline method. While this class does not implement a ThreadedGenerateData(), its GenerateData() delegates all calculations to an NeighborhoodOperatorImageFilter. Since the NeighborhoodOperatorImageFilter is multithreaded, this filter is multithreaded by default. Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 116 of file itkSobelEdgeDetectionImageFilter.h. References HardConnectedComponentImageFilter::PrintSelf().

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

• itkSobelEdgeDetectionImageFilter.h

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