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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< TInputImage, TOutputImage >:

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Collaboration diagram for itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >:

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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 Member Functions

virtual const char * GetClassName () const
 itkStaticConstMacro (ImageDimension, unsigned int, Superclass::ImageDimension)
virtual void SetStencilRadius (RadiusValueType _arg)
virtual RadiusValueType GetStencilRadius ()

Static Public Member Functions

Pointer New ()

Protected Member Functions

 MinMaxCurvatureFlowImageFilter ()
 ~MinMaxCurvatureFlowImageFilter ()
void PrintSelf (std::ostream &os, Indent indent) const
virtual void InitializeIteration ()

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:

\[ I_t = F_{\mbox{minmax}} |\nabla I| \]

where $ F_{\mbox{minmax}} = \max(\kappa,0) $ if $ \mbox{Avg}_{\mbox{stencil}}(x) $ is less than or equal to $ T_{thresold} $ and $ \min(\kappa,0) $, otherwise. $ \kappa $ is the mean curvature of the iso-brightness contour at point $ x $.

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 $ R $ around each point. The choice of $ R $, the stencil radius, governs the scale of the noise to be removed.

The threshold value $ T_{threshold} $ is the average intensity obtained in the direction perpendicular to the gradient at point $ x $ 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.

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.

Referenced by itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::~MinMaxCurvatureFlowImageFilter().

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.

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, and itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::Self.

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.

The documentation for this class was generated from the following file:
Generated at Sat Mar 31 02:39:14 2007 for ITK by doxygen 1.3.8 written by Dimitri van Heesch, © 1997-2000