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
|
/*=========================================================================
*
* 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.
*
*=========================================================================*/
/*=========================================================================
*
* Portions of this file are subject to the VTK Toolkit Version 3 copyright.
*
* Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
*
* For complete copyright, license and disclaimer of warranty information
* please refer to the NOTICE file at the top of the ITK source tree.
*
*=========================================================================*/
#ifndef itkRescaleIntensityImageFilter_hxx
#define itkRescaleIntensityImageFilter_hxx
#include "itkRescaleIntensityImageFilter.h"
#include "itkMinimumMaximumImageCalculator.h"
#include "itkMath.h"
namespace itk
{
template< typename TInputImage, typename TOutputImage >
RescaleIntensityImageFilter< TInputImage, TOutputImage >
::RescaleIntensityImageFilter() :
m_Scale( 1.0 ),
m_Shift( 0.0 ),
m_InputMinimum( NumericTraits< InputPixelType >::max() ),
m_InputMaximum( NumericTraits< InputPixelType >::ZeroValue() ),
m_OutputMinimum( NumericTraits< OutputPixelType >::NonpositiveMin() ),
m_OutputMaximum( NumericTraits< OutputPixelType >::max() )
{
}
template< typename TInputImage, typename TOutputImage >
void
RescaleIntensityImageFilter< TInputImage, TOutputImage >
::BeforeThreadedGenerateData()
{
if ( this->m_OutputMinimum > this->m_OutputMaximum )
{
itkExceptionMacro(<< "Minimum output value cannot be greater than Maximum output value.");
return;
}
typedef MinimumMaximumImageCalculator< TInputImage > CalculatorType;
typename CalculatorType::Pointer calculator = CalculatorType::New();
calculator->SetImage( this->GetInput() );
calculator->Compute();
this->m_InputMinimum = calculator->GetMinimum();
this->m_InputMaximum = calculator->GetMaximum();
if ( itk::Math::NotAlmostEquals(this->m_InputMinimum, this->m_InputMaximum) )
{
this->m_Scale =
( static_cast< RealType >( this->m_OutputMaximum )
- static_cast< RealType >( this->m_OutputMinimum ) )
/ ( static_cast< RealType >( this->m_InputMaximum )
- static_cast< RealType >( this->m_InputMinimum ) );
}
else if ( itk::Math::NotAlmostEquals(this->m_InputMaximum, NumericTraits<typename NumericTraits<InputPixelType>::ValueType >::ZeroValue()) )
{
this->m_Scale =
( static_cast< RealType >( this->m_OutputMaximum )
- static_cast< RealType >( this->m_OutputMinimum ) )
/ static_cast< RealType >( this->m_InputMaximum );
}
else
{
this->m_Scale = 0.0;
}
this->m_Shift =
static_cast< RealType >( this->m_OutputMinimum )
- static_cast< RealType >( this->m_InputMinimum ) * this->m_Scale;
// Set up the functor values
this->GetFunctor().SetMinimum(this->m_OutputMinimum);
this->GetFunctor().SetMaximum(this->m_OutputMaximum);
this->GetFunctor().SetFactor(this->m_Scale);
this->GetFunctor().SetOffset(this->m_Shift);
}
template< typename TInputImage, typename TOutputImage >
void
RescaleIntensityImageFilter< TInputImage, TOutputImage >
::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "Output Minimum: "
<< static_cast< typename NumericTraits< OutputPixelType >::PrintType >( this->m_OutputMinimum )
<< std::endl;
os << indent << "Output Maximum: "
<< static_cast< typename NumericTraits< OutputPixelType >::PrintType >( this->m_OutputMaximum )
<< std::endl;
}
} // end namespace itk
#endif
|
