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

#include <itkLaplacianImageFilter.h>

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

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

[legend]List of all members.

Public Types
typedef LaplacianImageFilter	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 Member Functions
	itkStaticConstMacro (ImageDimension, unsigned int, TOutputImage::ImageDimension)
virtual const char *	GetNameOfClass () const
virtual void	GenerateInputRequestedRegion () throw (InvalidRequestedRegionError)
void	SetUseImageSpacingOn ()
void	SetUseImageSpacingOff ()
virtual void	SetUseImageSpacing (bool _arg)
virtual bool	GetUseImageSpacing ()
Static Public Member Functions
Pointer	New ()
Protected Member Functions
	LaplacianImageFilter ()
virtual	~LaplacianImageFilter ()
void	GenerateData ()
void	PrintSelf (std::ostream &, Indent) const

---

Detailed Description

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

This filter computes the Laplacian of a scalar-valued image. The Laplacian is an isotropic measure of the 2nd spatial derivative of an image. The Laplacian of an image highlights regions of rapid intensity change and is therefore often used for edge detection. Often, the Laplacian is applied to an image that has first been smoothed with a Gaussian filter in order to reduce its sensitivity to noise.

The Laplacian at each pixel location is computed by convolution with the itk::LaplacianOperator.

Inputs and Outputs

The input to this filter is a scalar-valued itk::Image of arbitrary dimension. The output is a scalar-valued itk::Image.

See also:

Image

Neighborhood

NeighborhoodOperator

NeighborhoodIterator

LaplacianOperator

Definition at line 52 of file itkLaplacianImageFilter.h.

---

Member Typedef Documentation

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

Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 77 of file itkLaplacianImageFilter.h.

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

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

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

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

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

Definition at line 66 of file itkLaplacianImageFilter.h.

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

Definition at line 65 of file itkLaplacianImageFilter.h.

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

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

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

Definition at line 64 of file itkLaplacianImageFilter.h.

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

Extract some information from the image types. Dimensionality of the two images is assumed to be the same. Definition at line 63 of file itkLaplacianImageFilter.h.

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

Smart pointer typedef support. Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 76 of file itkLaplacianImageFilter.h.

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

Standard "Self" & Superclass typedef. Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >. Definition at line 58 of file itkLaplacianImageFilter.h.

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

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

---

Constructor & Destructor Documentation

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

Definition at line 112 of file itkLaplacianImageFilter.h.

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

Definition at line 116 of file itkLaplacianImageFilter.h.

---

Member Function Documentation

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

LaplacianImageFilter needs a larger input requested region than the output requested region (larger in the direction of the derivative). As such, LaplacianImageFilter 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::LaplacianImageFilter< TInputImage, TOutputImage >::GetNameOfClass (   )  const [virtual]

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

template<class TInputImage, class TOutputImage> virtual bool itk::LaplacianImageFilter< TInputImage, TOutputImage >::GetUseImageSpacing (   )  [virtual]

Set/Get whether or not the filter will use the spacing of the input image in its calculations

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

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

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

template<class TInputImage, class TOutputImage> void itk::LaplacianImageFilter< TInputImage, TOutputImage >::PrintSelf (  std::ostream &  , Indent  )  const [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 >.

template<class TInputImage, class TOutputImage> virtual void itk::LaplacianImageFilter< TInputImage, TOutputImage >::SetUseImageSpacing (  bool  _arg  )  [virtual]

Set/Get whether or not the filter will use the spacing of the input image in its calculations

template<class TInputImage, class TOutputImage> void itk::LaplacianImageFilter< TInputImage, TOutputImage >::SetUseImageSpacingOff (   )  [inline]

Ignore the image spacing. Use this option if you want derivatives in isotropic pixel space. Default is UseImageSpacingOn. Definition at line 101 of file itkLaplacianImageFilter.h.

template<class TInputImage, class TOutputImage> void itk::LaplacianImageFilter< TInputImage, TOutputImage >::SetUseImageSpacingOn (   )  [inline]

Use the image spacing information in calculations. Use this option if you want derivatives in physical space. Default is UseImageSpacingOn. Definition at line 96 of file itkLaplacianImageFilter.h.

---

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

• itkLaplacianImageFilter.h

---