ITK  4.2.0
Insight Segmentation and Registration Toolkit
itkSqrtImageFilter.h
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3  * Copyright Insight Software Consortium
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5  * Licensed under the Apache License, Version 2.0 (the "License");
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14  * See the License for the specific language governing permissions and
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18 #ifndef __itkSqrtImageFilter_h
19 #define __itkSqrtImageFilter_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 Sqrt
35 {
36 public:
37  Sqrt() {}
38  ~Sqrt() {}
39  bool operator!=(const Sqrt &) const
40  {
41  return false;
42  }
44 
45  bool operator==(const Sqrt & other) const
46  {
47  return !( *this != other );
48  }
49 
50  inline TOutput operator()(const TInput & A) const
51  {
52  return (TOutput)vcl_sqrt( (double)A );
53  }
54 };
55 }
65 template< class TInputImage, class TOutputImage >
66 class ITK_EXPORT SqrtImageFilter:
67  public
68  UnaryFunctorImageFilter< TInputImage, TOutputImage,
69  Functor::Sqrt< typename TInputImage::PixelType,
70  typename TOutputImage::PixelType > >
71 {
72 public:
76  TInputImage, TOutputImage,
77  Functor::Sqrt< typename TInputImage::PixelType,
78  typename TOutputImage::PixelType > > Superclass;
79 
82 
84  itkNewMacro(Self);
85 
87  itkTypeMacro(SqrtImageFilter,
89 
90 #ifdef ITK_USE_CONCEPT_CHECKING
91 
92  itkConceptMacro( InputConvertibleToDoubleCheck,
94  itkConceptMacro( DoubleConvertibleToOutputCheck,
96 
98 #endif
99 protected:
101  virtual ~SqrtImageFilter() {}
102 private:
103  SqrtImageFilter(const Self &); //purposely not implemented
104  void operator=(const Self &); //purposely not implemented
105 };
106 } // end namespace itk
108 
109 #endif
110