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itkSqrtImageFilter.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkSqrtImageFilter.h,v $
00005   Language:  C++
00006   Date:      $Date: 2009-04-01 14:36:34 $
00007   Version:   $Revision: 1.23 $
00008 
00009   Copyright (c) Insight Software Consortium. All rights reserved.
00010   See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
00011 
00012      This software is distributed WITHOUT ANY WARRANTY; without even 
00013      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00014      PURPOSE.  See the above copyright notices for more information.
00015 
00016 =========================================================================*/
00017 #ifndef __itkSqrtImageFilter_h
00018 #define __itkSqrtImageFilter_h
00019 
00020 #include "itkUnaryFunctorImageFilter.h"
00021 #include "vnl/vnl_math.h"
00022 
00023 namespace itk
00024 {
00025   
00031 namespace Function {  
00032   
00033 template< class TInput, class TOutput>
00034 class Sqrt
00035 {
00036 public:
00037   Sqrt() {}
00038   ~Sqrt() {}
00039   bool operator!=( const Sqrt & ) const
00040     {
00041     return false;
00042     }
00043   bool operator==( const Sqrt & other ) const
00044     {
00045     return !(*this != other);
00046     }
00047   inline TOutput operator()( const TInput & A ) const
00048     {
00049     return (TOutput)vcl_sqrt((double)A);
00050     }
00051 }; 
00052 }
00053 template <class TInputImage, class TOutputImage>
00054 class ITK_EXPORT SqrtImageFilter :
00055     public
00056 UnaryFunctorImageFilter<TInputImage,TOutputImage, 
00057                         Function::Sqrt< typename TInputImage::PixelType, 
00058                                         typename TOutputImage::PixelType>   >
00059 {
00060 public:
00062   typedef SqrtImageFilter                                Self;
00063   typedef UnaryFunctorImageFilter<
00064     TInputImage,TOutputImage, 
00065     Function::Sqrt< typename TInputImage::PixelType, 
00066                     typename TOutputImage::PixelType> >  Superclass;
00067   typedef SmartPointer<Self>                             Pointer;
00068   typedef SmartPointer<const Self>                       ConstPointer;
00069 
00071   itkNewMacro(Self);
00072 
00074   itkTypeMacro(SqrtImageFilter, 
00075                UnaryFunctorImageFilter);
00076 
00077 #ifdef ITK_USE_CONCEPT_CHECKING
00078 
00079   itkConceptMacro(InputConvertibleToDoubleCheck,
00080                   (Concept::Convertible<typename TInputImage::PixelType, double>));
00081   itkConceptMacro(DoubleConvertibleToOutputCheck,
00082                   (Concept::Convertible<double, typename TOutputImage::PixelType>));
00083 
00085 #endif
00086 
00087 protected:
00088   SqrtImageFilter() {}
00089   virtual ~SqrtImageFilter() {}
00090 
00091 private:
00092   SqrtImageFilter(const Self&); //purposely not implemented
00093   void operator=(const Self&); //purposely not implemented
00094 
00095 };
00096 
00097 } // end namespace itk
00098 
00099 
00100 #endif
00101 

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