ITK  4.2.0
Insight Segmentation and Registration Toolkit
itkLogImageFilter.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
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  *
17  *=========================================================================*/
18 #ifndef __itkLogImageFilter_h
19 #define __itkLogImageFilter_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 Log
35 {
36 public:
37  Log() {}
38  ~Log() {}
39  bool operator!=(const Log &) const
40  {
41  return false;
42  }
44 
45  bool operator==(const Log & other) const
46  {
47  return !( *this != other );
48  }
49 
50  inline TOutput operator()(const TInput & A) const
51  {
52  return static_cast< TOutput >( vcl_log( static_cast< double >( A ) ) );
53  }
54 };
55 }
63 template< class TInputImage, class TOutputImage >
64 class ITK_EXPORT LogImageFilter:
65  public
66  UnaryFunctorImageFilter< TInputImage, TOutputImage,
67  Functor::Log< typename TInputImage::PixelType,
68  typename TOutputImage::PixelType > >
69 {
70 public:
74  TInputImage, TOutputImage,
75  Functor::Log< typename TInputImage::PixelType,
76  typename TOutputImage::PixelType > > Superclass;
77 
80 
82  itkNewMacro(Self);
83 
85  itkTypeMacro(LogImageFilter,
87 
88 #ifdef ITK_USE_CONCEPT_CHECKING
89 
90  itkConceptMacro( InputConvertibleToDoubleCheck,
92  itkConceptMacro( DoubleConvertibleToOutputCheck,
94 
96 #endif
97 protected:
99  virtual ~LogImageFilter() {}
100 private:
101  LogImageFilter(const Self &); //purposely not implemented
102  void operator=(const Self &); //purposely not implemented
103 };
104 } // end namespace itk
106 
107 #endif
108