itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage > Class Template Reference
[Image Enhancement Filters, Multithreaded Filters]

Denoise an image using min/max curvature flow. More...

#include <itkMinMaxCurvatureFlowImageFilter.h>

Inheritance diagram for itk::MinMaxCurvatureFlowImageFilter:

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

[legend]List of all members.

Public Types
typedef MinMaxCurvatureFlowImageFilter	Self
typedef CurvatureFlowImageFilter< TInputImage, TOutputImage >	Superclass
typedef SmartPointer< Self >	Pointer
typedef SmartPointer< const Self >	ConstPointer
typedef Superclass::FiniteDifferenceFunctionType	FiniteDifferenceFunctionType
typedef Superclass::OutputImageType	OutputImageType
typedef MinMaxCurvatureFlowFunction< OutputImageType >	MinMaxCurvatureFlowFunctionType
typedef FiniteDifferenceFunctionType::RadiusType	RadiusType
typedef RadiusType::SizeValueType	RadiusValueType
Public Methods
virtual const char *	GetClassName () const
	itkStaticConstMacro (ImageDimension, unsigned int, Superclass::ImageDimension)
virtual void	SetStencilRadius (RadiusValueType _arg)
virtual RadiusValueType	GetStencilRadius ()
Static Public Methods
Pointer	New ()
Protected Methods
	MinMaxCurvatureFlowImageFilter ()
	~MinMaxCurvatureFlowImageFilter ()
void	PrintSelf (std::ostream &os, Indent indent) const
virtual void	InitializeIteration ()

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Detailed Description

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

Denoise an image using min/max curvature flow.

MinMaxCurvatureFlowImageFilter implements a curvature driven image denoising algorithm. Iso-brightness contours in the grayscale input image are viewed as a level set. The level set is then evolved using a curvature-based speed function:

where if is less than or equal to and , otherwise. is the mean curvature of the iso-brightness contour at point .

In min/max curvature flow, movement is turned on or off depending on the scale of the noise one wants to remove. Switching depends on the average image value of a region of radius around each point. The choice of , the stencil radius, governs the scale of the noise to be removed.

The threshold value is the average intensity obtained in the direction perpendicular to the gradient at point at the extrema of the local neighborhood.

This filter make use of the multi-threaded finite difference solver hierarchy. Updates are computed using a MinMaxCurvatureFlowFunction object. A zero flux Neumann boundary condition is used when computing derivatives near the data boundary.

Warning:

This filter assumes that the input and output types have the same dimensions. This filter also requires that the output image pixels are of a real type. This filter works for any dimensional images, however for dimensions greater than 3D, an expensive brute-force search is used to compute the local threshold.

Reference: "Level Set Methods and Fast Marching Methods", J.A. Sethian, Cambridge Press, Chapter 16, Second edition, 1999.

See also:

MinMaxCurvatureFlowFunction , CurvatureFlowImageFilter , BinaryMinMaxCurvatureFlowImageFilter

Definition at line 75 of file itkMinMaxCurvatureFlowImageFilter.h.

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Member Typedef Documentation

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

Reimplemented from itk::CurvatureFlowImageFilter< TInputImage, TOutputImage >. Reimplemented in itk::BinaryMinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >. Definition at line 84 of file itkMinMaxCurvatureFlowImageFilter.h.

template<class TInputImage, class TOutputImage> typedef Superclass::FiniteDifferenceFunctionType itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::FiniteDifferenceFunctionType

Inherit typedefs from Superclass. Reimplemented from itk::CurvatureFlowImageFilter< TInputImage, TOutputImage >. Reimplemented in itk::BinaryMinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >. Definition at line 95 of file itkMinMaxCurvatureFlowImageFilter.h.

template<class TInputImage, class TOutputImage> typedef MinMaxCurvatureFlowFunction<OutputImageType> itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::MinMaxCurvatureFlowFunctionType

MinMaxCurvatureFlowFunction type. Definition at line 100 of file itkMinMaxCurvatureFlowImageFilter.h.

template<class TInputImage, class TOutputImage> typedef Superclass::OutputImageType itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::OutputImageType

OutputImage type. Reimplemented from itk::CurvatureFlowImageFilter< TInputImage, TOutputImage >. Reimplemented in itk::BinaryMinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >. Definition at line 96 of file itkMinMaxCurvatureFlowImageFilter.h.

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

Reimplemented from itk::CurvatureFlowImageFilter< TInputImage, TOutputImage >. Reimplemented in itk::BinaryMinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >. Definition at line 83 of file itkMinMaxCurvatureFlowImageFilter.h.

template<class TInputImage, class TOutputImage> typedef FiniteDifferenceFunctionType::RadiusType itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::RadiusType

Typedef support for the neighbour radius. Definition at line 108 of file itkMinMaxCurvatureFlowImageFilter.h.

template<class TInputImage, class TOutputImage> typedef RadiusType::SizeValueType itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::RadiusValueType

Definition at line 109 of file itkMinMaxCurvatureFlowImageFilter.h. Referenced by itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::~MinMaxCurvatureFlowImageFilter().

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

Standard class typedefs. Reimplemented from itk::CurvatureFlowImageFilter< TInputImage, TOutputImage >. Reimplemented in itk::BinaryMinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >. Definition at line 80 of file itkMinMaxCurvatureFlowImageFilter.h.

template<class TInputImage, class TOutputImage> typedef CurvatureFlowImageFilter<TInputImage, TOutputImage> itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::Superclass

Reimplemented from itk::CurvatureFlowImageFilter< TInputImage, TOutputImage >. Reimplemented in itk::BinaryMinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >. Definition at line 82 of file itkMinMaxCurvatureFlowImageFilter.h.

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Constructor & Destructor Documentation

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

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

Definition at line 118 of file itkMinMaxCurvatureFlowImageFilter.h. References itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::RadiusValueType.

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Member Function Documentation

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

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

template<class TInputImage, class TOutputImage> virtual RadiusValueType itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::GetStencilRadius (    )  [virtual]

Set/Get the stencil radius.

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

Initialize the state of filter and equation before each iteration. Progress feeback is implemented as part of this method. Reimplemented from itk::CurvatureFlowImageFilter< TInputImage, TOutputImage >. Reimplemented in itk::BinaryMinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >.

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

Dimensionality of input and output data is assumed to be the same. It is inherited from the superclass. Reimplemented from itk::CurvatureFlowImageFilter< TInputImage, TOutputImage >. Reimplemented in itk::BinaryMinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >.

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

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

template<class TInputImage, class TOutputImage> void itk::MinMaxCurvatureFlowImageFilter< 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::CurvatureFlowImageFilter< TInputImage, TOutputImage >. Reimplemented in itk::BinaryMinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >.

template<class TInputImage, class TOutputImage> virtual void itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::SetStencilRadius (  RadiusValueType    _arg )  [virtual]

Set/Get the stencil radius.

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

• itkMinMaxCurvatureFlowImageFilter.h

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