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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: 2006/03/19 04:36:57 $
00007   Version:   $Revision: 1.20 $
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 )
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<TInputImage,TOutputImage, 
00064                                   Function::Sqrt< typename TInputImage::PixelType, 
00065                                                   typename TOutputImage::PixelType> >  Superclass;
00066   typedef SmartPointer<Self>   Pointer;
00067   typedef SmartPointer<const Self>  ConstPointer;
00068 
00070   itkNewMacro(Self);
00071 
00072 #ifdef ITK_USE_CONCEPT_CHECKING
00073 
00074   itkConceptMacro(InputConvertibleToDoubleCheck,
00075                   (Concept::Convertible<typename TInputImage::PixelType, double>));
00076   itkConceptMacro(DoubleConvertibleToOutputCheck,
00077                   (Concept::Convertible<double, typename TOutputImage::PixelType>));
00078 
00080 #endif
00081 
00082 protected:
00083   SqrtImageFilter() {}
00084   virtual ~SqrtImageFilter() {}
00085 
00086 private:
00087   SqrtImageFilter(const Self&); //purposely not implemented
00088   void operator=(const Self&); //purposely not implemented
00089 
00090 };
00091 
00092 } // end namespace itk
00093 
00094 
00095 #endif
00096 

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