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
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkDivideOrZeroOutImageFilter_h
#define itkDivideOrZeroOutImageFilter_h
#include "itkBinaryFunctorImageFilter.h"
#include "itkNumericTraits.h"
#include "itkMath.h"
namespace itk
{
namespace Functor {
template< typename TNumerator, typename TDenominator=TNumerator, typename TOutput=TNumerator >
class DivideOrZeroOut
{
public:
DivideOrZeroOut()
{
m_Threshold = 1e-5 * NumericTraits< TDenominator >::OneValue();
m_Constant = NumericTraits< TOutput >::ZeroValue();
};
~DivideOrZeroOut() {};
bool operator!=( const DivideOrZeroOut & other ) const
{
return !(*this == other);
}
bool operator==( const DivideOrZeroOut & itkNotUsed(other) ) const
{
// Always return true for now. Do a comparison to m_Threshold if it is
// every made set-able.
return true;
}
inline TOutput operator()( const TNumerator & n, const TDenominator & d )
{
if ( d < m_Threshold )
{
return m_Constant;
}
return static_cast< TOutput >( n ) / static_cast< TOutput >( d );
}
TDenominator m_Threshold;
TOutput m_Constant;
};
} // end namespace functor
/** \class DivideOrZeroOutImageFilter
* \brief
*
* \author Gaetan Lehmann. Biologie du Developpement et de la
* Reproduction, INRA de Jouy-en-Josas, France.
*
* \ingroup IntensityImageFilters Multithreaded
* \ingroup ITKImageIntensity
*
*/
template< typename TInputImage1,
typename TInputImage2=TInputImage1,
typename TOutputImage=TInputImage1 >
class DivideOrZeroOutImageFilter :
public BinaryFunctorImageFilter< TInputImage1, TInputImage2, TOutputImage,
Functor::DivideOrZeroOut<
typename TInputImage1::PixelType,
typename TInputImage2::PixelType,
typename TOutputImage::PixelType > >
{
public:
/** Standard class typedefs. */
typedef DivideOrZeroOutImageFilter Self;
typedef BinaryFunctorImageFilter<TInputImage1, TInputImage2, TOutputImage,
Functor::DivideOrZeroOut<
typename TInputImage1::PixelType,
typename TInputImage2::PixelType,
typename TOutputImage::PixelType > > Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
typedef typename TInputImage1::PixelType NumeratorPixelType;
typedef typename TInputImage2::PixelType DenominatorPixelType;
typedef typename TOutputImage::PixelType OutputPixelType;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Runtime information support. */
itkTypeMacro(DivideOrZeroOutImageFilter, BinaryFunctorImageFilter);
/** Print internal ivars */
void PrintSelf(std::ostream& os, Indent indent) const ITK_OVERRIDE
{
Superclass::PrintSelf(os, indent);
os << indent << "Threshold: " << GetThreshold() << std::endl;
}
/** Set/get the threshold below which pixels in the denominator will
* be considered zero. */
void SetThreshold( DenominatorPixelType threshold )
{
if ( Math::NotExactlyEquals(threshold, this->GetFunctor().m_Threshold) )
{
this->GetFunctor().m_Threshold = threshold;
this->Modified();
}
}
DenominatorPixelType GetThreshold() const
{
return this->GetFunctor().m_Threshold;
}
/** Set/get the constant value returned when the denominator input
* value is considered zero. */
void SetConstant( OutputPixelType constant )
{
if ( Math::NotExactlyEquals(constant, this->GetFunctor().m_Constant) )
{
this->GetFunctor().m_Constant = constant;
this->Modified();
}
}
OutputPixelType GetConstant() const
{
return this->GetFunctor().m_Constant;
}
protected:
DivideOrZeroOutImageFilter() {};
virtual ~DivideOrZeroOutImageFilter() {};
private:
DivideOrZeroOutImageFilter(const Self&) ITK_DELETE_FUNCTION;
void operator=(const Self&) ITK_DELETE_FUNCTION;
};
} // end namespace itk
#endif
|
