ITK  4.1.0
Insight Segmentation and Registration Toolkit
itkRGBToLuminanceImageFilter.h
Go to the documentation of this file.
00001 /*=========================================================================
00002  *
00003  *  Copyright Insight Software Consortium
00004  *
00005  *  Licensed under the Apache License, Version 2.0 (the "License");
00006  *  you may not use this file except in compliance with the License.
00007  *  You may obtain a copy of the License at
00008  *
00009  *         http://www.apache.org/licenses/LICENSE-2.0.txt
00010  *
00011  *  Unless required by applicable law or agreed to in writing, software
00012  *  distributed under the License is distributed on an "AS IS" BASIS,
00013  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  *  See the License for the specific language governing permissions and
00015  *  limitations under the License.
00016  *
00017  *=========================================================================*/
00018 #ifndef __itkRGBToLuminanceImageFilter_h
00019 #define __itkRGBToLuminanceImageFilter_h
00020 
00021 #include "itkUnaryFunctorImageFilter.h"
00022 
00023 namespace itk
00024 {
00036 namespace Functor
00037 {
00038 template< class TInput, class TOutput >
00039 class RGBToLuminance
00040 {
00041 public:
00042   typedef typename TInput::ComponentType                         ComponentType;
00043   typedef typename itk::NumericTraits< ComponentType >::RealType RealType;
00044 
00045   RGBToLuminance() {}
00046   ~RGBToLuminance() {}
00047   bool operator!=(const RGBToLuminance &) const
00048   {
00049     return false;
00050   }
00051 
00052   bool operator==(const RGBToLuminance & other) const
00053   {
00054     return !( *this != other );
00055   }
00056 
00057   inline TOutput operator()(const TInput & A) const
00058   { return static_cast< TOutput >( A.GetLuminance() ); }
00059 };
00060 }
00061 
00062 template< class TInputImage, class TOutputImage >
00063 class ITK_EXPORT RGBToLuminanceImageFilter:
00064   public
00065   UnaryFunctorImageFilter< TInputImage, TOutputImage,
00066                            Functor::RGBToLuminance<
00067                              typename TInputImage::PixelType,
00068                              typename TOutputImage::PixelType >   >
00069 {
00070 public:
00072   typedef RGBToLuminanceImageFilter Self;
00073   typedef UnaryFunctorImageFilter<
00074     TInputImage, TOutputImage,
00075     Functor::RGBToLuminance< typename TInputImage::PixelType,
00076                              typename TOutputImage::PixelType > >  Superclass;
00077 
00078   typedef SmartPointer< Self >       Pointer;
00079   typedef SmartPointer< const Self > ConstPointer;
00080 
00082   itkNewMacro(Self);
00083 
00085   itkTypeMacro(RGBToLuminanceImageFilter,
00086                UnaryFunctorImageFilter);
00087 
00088 #ifdef ITK_USE_CONCEPT_CHECKING
00089 
00090   itkConceptMacro( InputHasNumericTraitsCheck,
00091                    ( Concept::HasNumericTraits< typename TInputImage::PixelType::ComponentType > ) );
00092 
00094 #endif
00095 protected:
00096   RGBToLuminanceImageFilter() {}
00097   virtual ~RGBToLuminanceImageFilter() {}
00098 private:
00099   RGBToLuminanceImageFilter(const Self &); //purposely not implemented
00100   void operator=(const Self &);            //purposely not implemented
00101 };
00102 } // end namespace itk
00104 
00105 #endif
00106