1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkOtsuMultipleThresholdsCalculator.h
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkOtsuMultipleThresholdsCalculator_h
#define __itkOtsuMultipleThresholdsCalculator_h
#include "itkHistogramAlgorithmBase.h"
#include "itkHistogram.h"
namespace itk
{
/** \class OtsuMultipleThresholdsCalculator
* \brief Computes Otsu's thresholds for a histogram.
*
* You plug in the target histogram using SetInputHistogram method and
* specify the number of thresholds you want to be computed. Then call
* the GenerateData method to run the alogithm.
*
* The thresholds are computed so that the between-class variance is
* maximized.
*
* \ingroup Calculators
*/
template< class TInputHistogram >
class ITK_EXPORT OtsuMultipleThresholdsCalculator :
public HistogramAlgorithmBase< TInputHistogram >
{
public:
/**Standard class typedefs. */
typedef OtsuMultipleThresholdsCalculator Self;
typedef HistogramAlgorithmBase<TInputHistogram> Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
typedef typename TInputHistogram::MeasurementType MeasurementType;
#ifdef ITK_USE_REVIEW_STATISTICS
typedef typename TInputHistogram::AbsoluteFrequencyType FrequencyType;
#else
typedef typename TInputHistogram::FrequencyType FrequencyType;
#endif
typedef typename NumericTraits<MeasurementType>::RealType MeanType;
typedef typename NumericTraits<MeasurementType>::RealType VarianceType;
typedef std::vector<MeanType> MeanVectorType;
typedef std::vector<FrequencyType> FrequencyVectorType;
typedef typename TInputHistogram::InstanceIdentifier InstanceIdentifierType;
typedef std::vector<InstanceIdentifierType> InstanceIdentifierVectorType;
/**Standard Macros */
itkTypeMacro(OtsuMultipleThresholdsCalculator, HistogramAlgorithmsBase);
itkNewMacro(Self);
/** Typedef for the thresholds output */
typedef std::vector<MeasurementType> OutputType;
/** Returns the thresholds vector */
const OutputType& GetOutput();
/** Set/Get the number of thresholds. */
itkSetClampMacro(NumberOfThresholds, unsigned long, 1, NumericTraits<unsigned long>::max() );
itkGetConstMacro(NumberOfThresholds,unsigned long);
protected:
OtsuMultipleThresholdsCalculator();
virtual ~OtsuMultipleThresholdsCalculator() {}
void PrintSelf(std::ostream& os, Indent indent) const;
/** Calculates the thresholds and save them */
void GenerateData();
/** Increment the thresholds of one position */
bool IncrementThresholds(InstanceIdentifierVectorType& thresholdIds, MeanType totalMean, MeanVectorType& classMean, FrequencyVectorType& classFrequency);
private:
/** Internal thresholds storage */
unsigned long m_NumberOfThresholds;
OutputType m_Output;
}; // end of class
} // end of namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkOtsuMultipleThresholdsCalculator.txx"
#endif
#endif
|
