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itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage > Class Template Reference
[Fuzzy Connectedness-based Segmentation Filters]

#include <itkSimpleFuzzyConnectednessScalarImageFilter.h>

List of all members.

Public Types

typedef SimpleFuzzyConnectednessScalarImageFilter Self
typedef SimpleFuzzyConnectednessImageFilterBase<
TInputImage, TOutputImage > 
Superclass
typedef SmartPointer< SelfPointer
typedef SmartPointer< const
Self
ConstPointer
typedef Superclass::IndexType IndexType
typedef Superclass::SizeType SizeType
typedef Superclass::PixelType PixelType

Public Methods

virtual const char * GetClassName () const
virtual void SetDiff_Mean (double _arg)
virtual double GetDiff_Mean ()
virtual void SetDiff_Variance (double _arg)
virtual double GetDiff_Variance ()
virtual void SetMean (double _arg)
virtual double GetMean ()
virtual void SetVariance (double _arg)
virtual double GetVariance ()
void SetParameters (const double inmean, const double invar, const double indifmean, const double indifvar, const double inweight)

Static Public Methods

Pointer New ()

Protected Methods

 SimpleFuzzyConnectednessScalarImageFilter ()
 ~SimpleFuzzyConnectednessScalarImageFilter ()
virtual double FuzzyAffinity (const PixelType f1, const PixelType f2)

Protected Attributes

double m_Mean
double m_Variance
double m_Diff_Mean
double m_Diff_Variance


Detailed Description

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

/class FuzzyConnectednessRGBImageFilter

Perform the segmentation for a single channel (Grayscale) image via thresholding of a fuzzy connectedness scene. Used as a node of the segmentation toolkit. Fuzzy affinity is defined between two neighboor pixels, to reflect their similarity and assign a probability that these two pixels belong to the same object. A "path" between two pixels is a list of pixels that connect them, the strength of a particular path is defined as the weakest affinity between the neighboor pixels that form the path. The fuzzy connectedness between two pixels is defined as the strongest path strength between these two pixels. The segmentation based on fuzzy connectedness assumes that the fuzzy connectedness between any two pixels from a single object is significantly higher than those for pixels belonging to different objects. A fuzzy connectedness scene is first computed for a set of input seed points selected inside the object of interest. A threshold is then applied to the fuzzy scene to extract the binary segmented object. The fuzzy affinity here was defined as a gaussian function of the pixel difference and the difference of the estimated object mean and the mean of the two input pixels.

Input Parameters are: (1) Input image in the form itkImage (2) Seed points (3) Threshold value.

Usage: 1. use SetInput to import the input image object 2. use SetParameter, SetSeed, SetThreshold to set the parameters 3. run GenerateData() to perform the segmenation 4. threshold can be set using UpdateThreshold after the segmentation, and no computation will be redo. no need to run GenerateData. But if SetThreshold was used. MakeSegmentObject() should be called to get the updated result. 5. use GetOutput to obtain the resulted binary image Object. 6. GetFuzzyScene gives the pointer of Image<unsigned short> for the fuzzy scene.

Detailed information about this algorithm can be found in: "Fuzzy Connectedness and Object Definition: Theory, Algorithms, and Applications in Image Segmentation", J. Udupa and S. Samarasekera Graphical Models and Image Processing, Vol.58, No.3. pp 246-261, 1996.

Definition at line 73 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.


Member Typedef Documentation

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

Definition at line 82 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.

template<class TInputImage, class TOutputImage>
typedef Superclass::IndexType itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::IndexType
 

Region, size, and pixel types.

Definition at line 92 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.

template<class TInputImage, class TOutputImage>
typedef Superclass::PixelType itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::PixelType
 

Definition at line 94 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.

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

Definition at line 81 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.

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

Standard class typedefs.

Definition at line 78 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.

template<class TInputImage, class TOutputImage>
typedef Superclass::SizeType itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::SizeType
 

Definition at line 93 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.

template<class TInputImage, class TOutputImage>
typedef SimpleFuzzyConnectednessImageFilterBase<TInputImage,TOutputImage> itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::Superclass
 

Definition at line 80 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.


Constructor & Destructor Documentation

template<class TInputImage, class TOutputImage>
itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::SimpleFuzzyConnectednessScalarImageFilter   [protected]
 

template<class TInputImage, class TOutputImage>
itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::~SimpleFuzzyConnectednessScalarImageFilter   [protected]
 


Member Function Documentation

template<class TInputImage, class TOutputImage>
virtual double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::FuzzyAffinity const PixelType    f1,
const PixelType    f2
[protected, virtual]
 

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

Run-time type information (and related methods).

template<class TInputImage, class TOutputImage>
virtual double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::GetDiff_Mean   [virtual]
 

Get the Estimation of the mean difference between neighbor pixels for the object.

template<class TInputImage, class TOutputImage>
virtual double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::GetDiff_Variance   [virtual]
 

Get the Estimation of the variance of the difference between pixels for the object.

template<class TInputImage, class TOutputImage>
virtual double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::GetMean   [virtual]
 

Get the Estimation of the mean difference between neighbor pixels for the object.

template<class TInputImage, class TOutputImage>
virtual double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::GetVariance   [virtual]
 

Get the Estimation of the variance of the difference between pixels for the object.

template<class TInputImage, class TOutputImage>
Pointer itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::New   [static]
 

Method for creation through the object factory.

template<class TInputImage, class TOutputImage>
virtual void itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::SetDiff_Mean double    _arg [virtual]
 

Set the Estimation of the mean difference between neighbor pixels for the object.

template<class TInputImage, class TOutputImage>
virtual void itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::SetDiff_Variance double    _arg [virtual]
 

Set the Estimation of the variance of the difference between pixels for the object.

template<class TInputImage, class TOutputImage>
virtual void itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::SetMean double    _arg [virtual]
 

Set the Estimation of the mean difference between neighbor pixels for the object.

template<class TInputImage, class TOutputImage>
void itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::SetParameters const double    inmean,
const double    invar,
const double    indifmean,
const double    indifvar,
const double    inweight
 

Setting the parameters for segmentation.

template<class TInputImage, class TOutputImage>
virtual void itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::SetVariance double    _arg [virtual]
 

Set the Estimation of the variance of the difference between pixels for the object.


Member Data Documentation

template<class TInputImage, class TOutputImage>
double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::m_Diff_Mean [protected]
 

Definition at line 138 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.

template<class TInputImage, class TOutputImage>
double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::m_Diff_Variance [protected]
 

Definition at line 139 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.

template<class TInputImage, class TOutputImage>
double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::m_Mean [protected]
 

Definition at line 136 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.

template<class TInputImage, class TOutputImage>
double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::m_Variance [protected]
 

Definition at line 137 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.


The documentation for this class was generated from the following file:
Generated at Wed Mar 12 01:21:48 2003 for ITK by doxygen 1.2.15 written by Dimitri van Heesch, © 1997-2000