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

Denoise a binary image using min/max curvature flow. More...

#include <itkBinaryMinMaxCurvatureFlowImageFilter.h>

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

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

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List of all members.

Public Types

typedef BinaryMinMaxCurvatureFlowImageFilter Self
typedef MinMaxCurvatureFlowImageFilter<
TInputImage, TOutputImage > 		Superclass
typedef SmartPointer< Self > Pointer
typedef SmartPointer< const
Self > 		ConstPointer
typedef Superclass::FiniteDifferenceFunctionType FiniteDifferenceFunctionType
typedef Superclass::OutputImageType OutputImageType
typedef BinaryMinMaxCurvatureFlowFunction<
OutputImageType > 		BinaryMinMaxCurvatureFlowFunctionType

Public Member Functions

virtual const char * GetClassName () const
 itkStaticConstMacro (ImageDimension, unsigned int, Superclass::ImageDimension)
virtual void SetThreshold (double _arg)
virtual double GetThreshold ()

Static Public Member Functions

Pointer New ()

Protected Member Functions

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

Detailed Description

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

Denoise a binary image using min/max curvature flow.

BinaryMinMaxCurvatureFlowImageFilter implements a curvature driven image denosing algorithm. This filter assumes that the image is essentially binary: consisting of two classes. Iso-brightness contours in the 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}} = \min(\kappa,0) $ if $ \mbox{Avg}_{\mbox{stencil}}(x) $ is less than or equal to $ T_{thresold} $ and $ \max(\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 a user specified value which discriminates between the two pixel classes.

This filter make use of the multi-threaded finite difference solver hierarchy. Updates are computed using a BinaryMinMaxCurvatureFlowFunction 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.
Reference: "Level Set Methods and Fast Marching Methods", J.A. Sethian, Cambridge Press, Chapter 16, Second edition, 1999.

See also:
BinaryMinMaxCurvatureFlowFunction

CurvatureFlowImageFilter

MinMaxCurvatureFlowImageFilter

Definition at line 74 of file itkBinaryMinMaxCurvatureFlowImageFilter.h.

Member Typedef Documentation

template<class TInputImage, class TOutputImage>
typedef BinaryMinMaxCurvatureFlowFunction<OutputImageType> itk::BinaryMinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::BinaryMinMaxCurvatureFlowFunctionType
 

BinaryMinMaxCurvatureFlowFunction type. Definition at line 99 of file itkBinaryMinMaxCurvatureFlowImageFilter.h.

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

Reimplemented from itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >.

Definition at line 83 of file itkBinaryMinMaxCurvatureFlowImageFilter.h.

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

Inherit typedefs from Superclass.

Reimplemented from itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >.

Definition at line 94 of file itkBinaryMinMaxCurvatureFlowImageFilter.h.

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

OutputImage type.

Reimplemented from itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >.

Definition at line 95 of file itkBinaryMinMaxCurvatureFlowImageFilter.h.

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

Reimplemented from itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >.

Definition at line 82 of file itkBinaryMinMaxCurvatureFlowImageFilter.h.

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

Standard class typedefs.

Reimplemented from itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >.

Definition at line 79 of file itkBinaryMinMaxCurvatureFlowImageFilter.h.

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

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

Reimplemented from itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >.

Definition at line 81 of file itkBinaryMinMaxCurvatureFlowImageFilter.h.

Constructor & Destructor Documentation

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

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

Definition at line 112 of file itkBinaryMinMaxCurvatureFlowImageFilter.h.

References itk::BinaryMinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::Self.

Member Function Documentation

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

Run-time type information (and related methods).

Reimplemented from itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >.

template<class TInputImage, class TOutputImage>
virtual double itk::BinaryMinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::GetThreshold (   )  [virtual]
 

Set/Get the threshold value.

template<class TInputImage, class TOutputImage>
virtual void itk::BinaryMinMaxCurvatureFlowImageFilter< 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::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >.

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

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

Method for creation through the object factory.

Reimplemented from itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >.

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

template<class TInputImage, class TOutputImage>
virtual void itk::BinaryMinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::SetThreshold (  double  _arg  )  [virtual]
 

Set/Get the threshold value.

The documentation for this class was generated from the following file:
Generated at Sat Mar 31 02:36:21 2007 for ITK by doxygen 1.3.8 written by Dimitri van Heesch, © 1997-2000