ITK  4.2.0
Insight Segmentation and Registration Toolkit
itkExpImageFilter.h
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1 /*=========================================================================
2  *
3  * Copyright Insight Software Consortium
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0.txt
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11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
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14  * See the License for the specific language governing permissions and
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16  *
17  *=========================================================================*/
18 #ifndef __itkExpImageFilter_h
19 #define __itkExpImageFilter_h
20 
22 #include "vnl/vnl_math.h"
23 
24 namespace itk
25 {
26 namespace Functor
27 {
33 template< class TInput, class TOutput >
34 class Exp
35 {
36 public:
37  Exp() {}
38  ~Exp() {}
39  bool operator!=(const Exp &) const
40  {
41  return false;
42  }
44 
45  bool operator==(const Exp & other) const
46  {
47  return !( *this != other );
48  }
49 
50  inline TOutput operator()(const TInput & A) const
51  {
52  return (TOutput)vcl_exp( (double)A );
53  }
54 };
55 }
66 template< class TInputImage, class TOutputImage >
67 class ITK_EXPORT ExpImageFilter:
68  public
69  UnaryFunctorImageFilter< TInputImage, TOutputImage,
70  Functor::Exp<
71  typename TInputImage::PixelType,
72  typename TOutputImage::PixelType > >
73 {
74 public:
78  TInputImage, TOutputImage,
79  Functor::Exp< typename TInputImage::PixelType,
80  typename TOutputImage::PixelType > > Superclass;
81 
84 
86  itkNewMacro(Self);
87 
89  itkTypeMacro(ExpImageFilter,
91 
92 #ifdef ITK_USE_CONCEPT_CHECKING
93 
94  itkConceptMacro( InputConvertibleToDoubleCheck,
96  itkConceptMacro( DoubleConvertibleToOutputCheck,
98 
100 #endif
101 protected:
103  virtual ~ExpImageFilter() {}
104 private:
105  ExpImageFilter(const Self &); //purposely not implemented
106  void operator=(const Self &); //purposely not implemented
107 };
108 } // end namespace itk
110 
111 #endif
112