Main Page   Groups   Namespace List   Class Hierarchy   Alphabetical List   Compound List   File List   Namespace Members   Compound Members   File Members   Concepts

itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram > Class Template Reference

This class computes texture feature coefficients from a grey level co-occurrence matrix. More...

#include <itkGreyLevelCooccurrenceMatrixTextureCoefficientsCalculator.h>

Inheritance diagram for itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >:

Inheritance graph
[legend]
Collaboration diagram for itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >:

Collaboration graph
[legend]
List of all members.

Public Types

typedef GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator Self
typedef Object Superclass
typedef SmartPointer< Self > Pointer
typedef SmartPointer< const
Self > 		ConstPointer
typedef THistogram HistogramType
typedef HistogramType::Pointer HistogramPointer
typedef HistogramType::ConstPointer HistogramConstPointer
typedef HistogramType::MeasurementType MeasurementType
typedef HistogramType::MeasurementVectorType MeasurementVectorType
typedef HistogramType::IndexType IndexType
typedef HistogramType::FrequencyType FrequencyType

Public Member Functions

virtual const char * GetNameOfClass () const
void Compute (void)
double GetFeature (TextureFeatureName feature)
virtual double GetEnergy ()
virtual double GetEntropy ()
virtual double GetCorrelation ()
virtual double GetInverseDifferenceMoment ()
virtual double GetInertia ()
virtual double GetClusterShade ()
virtual double GetClusterProminence ()
virtual double GetHaralickCorrelation ()
virtual void SetHistogram (HistogramType *_arg)
virtual HistogramType * GetHistogram ()

Static Public Member Functions

Pointer New ()

Protected Member Functions

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

Detailed Description

template<class THistogram>
class itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >

This class computes texture feature coefficients from a grey level co-occurrence matrix.

This class computes features that summarize image texture, given a grey level co-occurrence matrix (generated by a ScalarImageToGreyLevelCooccurrenceMatrixGenerator or related class).

The features calculated are as follows (where $ g(i, j) $ is the element in cell i, j of a a normalized GLCM):

"Energy" $ = f_1 = \sum_{i,j}g(i, j)^2 $

"Entropy" $ = f_2 = -\sum_{i,j}g(i, j) \log_2 g(i, j)$, or 0 if $g(i, j) = 0$

"Correlation" $ = f_3 = \sum_{i,j}\frac{(i - \mu)(j - \mu)g(i, j)}{\sigma^2} $

"Difference Moment" $= f_4 = \sum_{i,j}\frac{1}{1 + (i - j)^2}g(i, j) $

"Inertia" $ = f_5 = \sum_{i,j}(i - j)^2g(i, j) $ (sometimes called "contrast.")

"Cluster Shade" $ = f_6 = \sum_{i,j}((i - \mu) + (j - \mu))^3 g(i, j) $

"Cluster Prominence" $ = f_7 = \sum_{i,j}((i - \mu) + (j - \mu))^4 g(i, j) $

"Haralick's Correlation" $ = f_8 = \frac{\sum_{i,j}(i, j) g(i, j) -\mu_t^2}{\sigma_t^2} $ where $\mu_t$ and $\sigma_t$ are the mean and standard deviation of the row (or column, due to symmetry) sums.

Above, $ \mu = $ (weighted pixel average) $ = \sum_{i,j}i \cdot g(i, j) = \sum_{i,j}j \cdot g(i, j) $ (due to matrix summetry), and

$ \sigma = $ (weighted pixel variance) $ = \sum_{i,j}(i - \mu)^2 \cdot g(i, j) = \sum_{i,j}(j - \mu)^2 \cdot g(i, j) $ (due to matrix summetry)

A good texture feature set to use is the Conners, Trivedi and Harlow set: features 1, 2, 4, 5, 6, and 7. There is some correlation between the various features, so using all of them at the same time is not necessarialy a good idea.

NOTA BENE: The input histogram will be forcably normalized! This algorithm takes three passes through the input histogram if the histogram was already normalized, and four if not.

Web references:

http://www.cssip.uq.edu.au/meastex/www/algs/algs/algs.html http://www.ucalgary.ca/~mhallbey/texture/texture_tutorial.html

Print references:

Haralick, R.M., K. Shanmugam and I. Dinstein. 1973. Textural Features for Image Classification. IEEE Transactions on Systems, Man and Cybernetics. SMC-3(6):610-620.

Haralick, R.M. 1979. Statistical and Structural Approaches to Texture. Proceedings of the IEEE, 67:786-804.

R.W. Conners and C.A. Harlow. A Theoretical Comaprison of Texture Algorithms. IEEE Transactions on Pattern Analysis and Machine Intelligence, 2:204-222, 1980.

R.W. Conners, M.M. Trivedi, and C.A. Harlow. Segmentation of a High-Resolution Urban Scene using Texture Operators. Computer Vision, Graphics and Image Processing, 25:273-310, 1984.

See also:
ScalarImageToGreyLevelCooccurrenceMatrixGenerator

MaskedScalarImageToGreyLevelCooccurrenceMatrixGenerator

ScalarImageTextureCalculator

Author: Zachary Pincus

Definition at line 103 of file itkGreyLevelCooccurrenceMatrixTextureCoefficientsCalculator.h.

Member Typedef Documentation

template<class THistogram>
typedef SmartPointer<const Self> itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::ConstPointer
 

Reimplemented from itk::Object.

Definition at line 110 of file itkGreyLevelCooccurrenceMatrixTextureCoefficientsCalculator.h.

template<class THistogram>
typedef HistogramType::FrequencyType itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::FrequencyType
 

Definition at line 124 of file itkGreyLevelCooccurrenceMatrixTextureCoefficientsCalculator.h.

template<class THistogram>
typedef HistogramType::ConstPointer itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::HistogramConstPointer
 

Definition at line 120 of file itkGreyLevelCooccurrenceMatrixTextureCoefficientsCalculator.h.

template<class THistogram>
typedef HistogramType::Pointer itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::HistogramPointer
 

Definition at line 119 of file itkGreyLevelCooccurrenceMatrixTextureCoefficientsCalculator.h.

Referenced by itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::~GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator().

template<class THistogram>
typedef THistogram itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::HistogramType
 

Definition at line 118 of file itkGreyLevelCooccurrenceMatrixTextureCoefficientsCalculator.h.

template<class THistogram>
typedef HistogramType::IndexType itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::IndexType
 

Definition at line 123 of file itkGreyLevelCooccurrenceMatrixTextureCoefficientsCalculator.h.

template<class THistogram>
typedef HistogramType::MeasurementType itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::MeasurementType
 

Definition at line 121 of file itkGreyLevelCooccurrenceMatrixTextureCoefficientsCalculator.h.

template<class THistogram>
typedef HistogramType::MeasurementVectorType itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::MeasurementVectorType
 

Definition at line 122 of file itkGreyLevelCooccurrenceMatrixTextureCoefficientsCalculator.h.

template<class THistogram>
typedef SmartPointer<Self> itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::Pointer
 

Reimplemented from itk::Object.

Definition at line 109 of file itkGreyLevelCooccurrenceMatrixTextureCoefficientsCalculator.h.

template<class THistogram>
typedef GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::Self
 

Standard typedefs

Reimplemented from itk::Object.

Definition at line 107 of file itkGreyLevelCooccurrenceMatrixTextureCoefficientsCalculator.h.

template<class THistogram>
typedef Object itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::Superclass
 

Reimplemented from itk::Object.

Definition at line 108 of file itkGreyLevelCooccurrenceMatrixTextureCoefficientsCalculator.h.

Constructor & Destructor Documentation

template<class THistogram>
itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator (   )  [inline, protected]
 

Definition at line 149 of file itkGreyLevelCooccurrenceMatrixTextureCoefficientsCalculator.h.

template<class THistogram>
virtual itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::~GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator (   )  [inline, protected, virtual]
 

Definition at line 150 of file itkGreyLevelCooccurrenceMatrixTextureCoefficientsCalculator.h.

References itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::HistogramPointer.

Member Function Documentation

template<class THistogram>
void itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::Compute (  void   ) 
 

Triggers the Computation of the histogram

template<class THistogram>
virtual double itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::GetClusterProminence (   )  [virtual]
 

template<class THistogram>
virtual double itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::GetClusterShade (   )  [virtual]
 

template<class THistogram>
virtual double itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::GetCorrelation (   )  [virtual]
 

template<class THistogram>
virtual double itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::GetEnergy (   )  [virtual]
 

template<class THistogram>
virtual double itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::GetEntropy (   )  [virtual]
 

template<class THistogram>
double itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::GetFeature (  TextureFeatureName  feature  ) 
 

Methods to return the feature values.

Warning:
These outputs are only valid after the Compute() method has been invoked
See also:
Compute

template<class THistogram>
virtual double itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::GetHaralickCorrelation (   )  [virtual]
 

template<class THistogram>
virtual HistogramType* itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::GetHistogram (   )  [virtual]
 

Connects the GLCM histogram over which the features are going to be computed

template<class THistogram>
virtual double itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::GetInertia (   )  [virtual]
 

template<class THistogram>
virtual double itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::GetInverseDifferenceMoment (   )  [virtual]
 

template<class THistogram>
virtual const char* itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::GetNameOfClass (   )  const [virtual]
 

Run-time type information (and related methods).

Reimplemented from itk::Object.

template<class THistogram>
Pointer itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::New (   )  [static]
 

standard New() method support

Reimplemented from itk::Object.

template<class THistogram>
void itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::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::Object.

template<class THistogram>
virtual void itk::Statistics::GreyLevelCooccurrenceMatrixTextureCoefficientsCalculator< THistogram >::SetHistogram (  HistogramType *  _arg  )  [virtual]
 

Connects the GLCM histogram over which the features are going to be computed

The documentation for this class was generated from the following file:
Generated at Thu May 25 03:05:01 2006 for ITK by doxygen 1.3.5 written by Dimitri van Heesch, © 1997-2000