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itkMultiplyByConstantImageFilter.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkMultiplyByConstantImageFilter.h,v $
00005   Language:  C++
00006   Date:      $Date: 2009-02-24 19:03:15 $
00007   Version:   $Revision: 1.4 $
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 
00018 #ifndef __itkMultiplyByConstantImageFilter_h
00019 #define __itkMultiplyByConstantImageFilter_h
00020 
00021 #include "itkUnaryFunctorImageFilter.h"
00022 #include "itkNumericTraits.h"
00023 
00024 namespace itk
00025 {
00026   
00043 namespace Functor {  
00044   
00045 template< class TInput, class TConstant, class TOutput>
00046 class MultiplyByConstant
00047 {
00048 public:
00049   MultiplyByConstant() : m_Constant(NumericTraits<TConstant>::One) {};
00050   ~MultiplyByConstant() {};
00051   bool operator!=( const MultiplyByConstant & other ) const
00052     {
00053     return !(*this == other);
00054     }
00055   bool operator==( const MultiplyByConstant & other ) const
00056     {
00057     return other.m_Constant == m_Constant;
00058     }
00059   inline TOutput operator()( const TInput & A ) const
00060     {
00061     // Because the user has to specify the constant we don't
00062     // check if the cte is not 0;
00063     return static_cast<TOutput>( A * m_Constant );
00064     }
00065   void SetConstant(TConstant ct) {this->m_Constant = ct; }
00066   const TConstant & GetConstant() const { return m_Constant; }
00067   
00068   TConstant m_Constant;
00069 };
00070 }
00071 
00072 template <class TInputImage, class TConstant, class TOutputImage>
00073 class ITK_EXPORT MultiplyByConstantImageFilter :
00074       public
00075 UnaryFunctorImageFilter<TInputImage,TOutputImage, 
00076                         Functor::MultiplyByConstant< 
00077    typename TInputImage::PixelType, TConstant,
00078    typename TOutputImage::PixelType> >
00079 {
00080 public:
00082   typedef MultiplyByConstantImageFilter                 Self;
00083   typedef UnaryFunctorImageFilter<
00084     TInputImage,TOutputImage, 
00085     Functor::MultiplyByConstant< 
00086       typename TInputImage::PixelType, TConstant,
00087       typename TOutputImage::PixelType>   >             Superclass;
00088   typedef SmartPointer<Self>                            Pointer;
00089   typedef SmartPointer<const Self>                      ConstPointer;
00090 
00092   itkNewMacro(Self);
00093 
00095   itkTypeMacro(MultiplyByConstantImageFilter, UnaryFunctorImageFilter);
00096 
00097   
00099   void SetConstant(TConstant ct)
00100     {
00101     if( ct != this->GetFunctor().GetConstant() )
00102       {
00103       this->GetFunctor().SetConstant(ct);
00104       this->Modified();
00105       }
00106     }
00107   const TConstant & GetConstant() const
00108     {
00109     return this->GetFunctor().GetConstant();
00110     }
00112 
00113 
00114 #ifdef ITK_USE_CONCEPT_CHECKING
00115 
00116   itkConceptMacro(InputConvertibleToOutputCheck,
00117                   (Concept::Convertible<typename TInputImage::PixelType,
00118                    typename TOutputImage::PixelType>));
00119   itkConceptMacro(Input1Input2OutputMultiplyOperatorCheck,
00120                   (Concept::MultiplyOperator<typename TInputImage::PixelType,
00121                    TConstant,
00122                    typename TOutputImage::PixelType>));
00123 
00125 #endif
00126 
00127 protected:
00128   MultiplyByConstantImageFilter() {};
00129   virtual ~MultiplyByConstantImageFilter() {};
00130    
00131   void PrintSelf(std::ostream &os, Indent indent) const
00132     {
00133     Superclass::PrintSelf(os, indent);
00134     os << indent << "Constant: " 
00135        << static_cast<typename NumericTraits<TConstant>::PrintType>(this->GetConstant())
00136        << std::endl;
00137     }
00138 
00139 private:
00140   MultiplyByConstantImageFilter(const Self&); //purposely not implemented
00141   void operator=(const Self&); //purposely not implemented
00142 
00143 };
00144 
00145 
00146 } // end namespace itk
00147 
00148 #endif
00149 

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