#include <itkSimpleFuzzyConnectednessScalarImageFilter.h>
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 74 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.
Public Types | |
| typedef SmartPointer< const Self > | ConstPointer |
| typedef Superclass::IndexType | IndexType |
| typedef Superclass::PixelType | PixelType |
| typedef SmartPointer< Self > | Pointer |
| typedef SimpleFuzzyConnectednessScalarImageFilter | Self |
| typedef Superclass::SizeType | SizeType |
| typedef SimpleFuzzyConnectednessImageFilterBase< TInputImage, TOutputImage > | Superclass |
Public Member Functions | |
| virtual double | GetDiff_Mean () |
| virtual double | GetDiff_Variance () |
| virtual double | GetMean () |
| virtual const char * | GetNameOfClass () const |
| virtual double | GetVariance () |
| virtual void | SetDiff_Mean (double _arg) |
| virtual void | SetDiff_Variance (double _arg) |
| virtual void | SetMean (double _arg) |
| void | SetParameters (const double inmean, const double invar, const double indifmean, const double indifvar, const double inweight) |
| virtual void | SetVariance (double _arg) |
Static Public Member Functions | |
| static Pointer | New () |
Protected Member Functions | |
| virtual double | FuzzyAffinity (const PixelType f1, const PixelType f2) |
| virtual void | PrintSelf (std::ostream &os, Indent indent) const |
| SimpleFuzzyConnectednessScalarImageFilter () | |
| ~SimpleFuzzyConnectednessScalarImageFilter () | |
Protected Attributes | |
| double | m_Diff_Mean |
| double | m_Diff_Variance |
| double | m_Mean |
| double | m_Variance |
| typedef SmartPointer<const Self> itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::ConstPointer |
Definition at line 83 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.
| typedef Superclass::IndexType itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::IndexType |
Region, size, and pixel types.
Definition at line 90 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.
| typedef Superclass::PixelType itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::PixelType |
Definition at line 95 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.
| typedef SmartPointer<Self> itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::Pointer |
Definition at line 82 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.
| typedef SimpleFuzzyConnectednessScalarImageFilter itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::Self |
Standard class typedefs.
Definition at line 79 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.
| typedef Superclass::SizeType itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::SizeType |
Definition at line 94 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.
| typedef SimpleFuzzyConnectednessImageFilterBase<TInputImage,TOutputImage> itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::Superclass |
Definition at line 81 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.
| itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::SimpleFuzzyConnectednessScalarImageFilter | ( | ) | [protected] |
| itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::~SimpleFuzzyConnectednessScalarImageFilter | ( | ) | [protected] |
| virtual double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::FuzzyAffinity | ( | const PixelType | f1, | |
| const PixelType | f2 | |||
| ) | [protected, virtual] |
| virtual double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::GetDiff_Mean | ( | ) | [virtual] |
Get the Estimation of the mean difference between neighbor pixels for the object.
| virtual double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::GetDiff_Variance | ( | ) | [virtual] |
Get the Estimation of the variance of the difference between pixels for the object.
| virtual double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::GetMean | ( | ) | [virtual] |
Get the Estimation of the mean difference between neighbor pixels for the object.
| virtual const char* itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::GetNameOfClass | ( | ) | const [virtual] |
Run-time type information (and related methods).
| virtual double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::GetVariance | ( | ) | [virtual] |
Get the Estimation of the variance of the difference between pixels for the object.
| static Pointer itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::New | ( | ) | [static] |
Method for creation through the object factory.
| virtual void itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::PrintSelf | ( | std::ostream & | os, | |
| Indent | indent | |||
| ) | const [protected, virtual] |
| virtual void itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::SetDiff_Mean | ( | double | _arg | ) | [virtual] |
Set the Estimation of the mean difference between neighbor pixels for the object.
| 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.
| virtual void itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::SetMean | ( | double | _arg | ) | [virtual] |
Set the Estimation of the mean difference between neighbor pixels for the object.
| 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.
| virtual void itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::SetVariance | ( | double | _arg | ) | [virtual] |
Set the Estimation of the variance of the difference between pixels for the object.
double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::m_Diff_Mean [protected] |
Definition at line 140 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.
double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::m_Diff_Variance [protected] |
Definition at line 141 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.
double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::m_Mean [protected] |
Definition at line 138 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.
double itk::SimpleFuzzyConnectednessScalarImageFilter< TInputImage, TOutputImage >::m_Variance [protected] |
Definition at line 139 of file itkSimpleFuzzyConnectednessScalarImageFilter.h.
1.5.1 written by Dimitri van Heesch,
© 1997-2000