ITK  4.1.0
Insight Segmentation and Registration Toolkit
itkBinaryThresholdProjectionImageFilter.h
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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 __itkBinaryThresholdProjectionImageFilter_h
00019 #define __itkBinaryThresholdProjectionImageFilter_h
00020 
00021 #include "itkProjectionImageFilter.h"
00022 #include "itkConceptChecking.h"
00023 
00024 namespace itk
00025 {
00049 namespace Function
00050 {
00051 template< class TInputPixel, class TOutputPixel >
00052 class BinaryThresholdAccumulator
00053 {
00054 public:
00055   BinaryThresholdAccumulator(SizeValueType) {}
00056   ~BinaryThresholdAccumulator(){}
00057 
00058   inline void Initialize()
00059   {
00060     m_IsForeground = false;
00061   }
00062 
00063   inline void operator()(const TInputPixel & input)
00064   {
00065     if ( input >= m_ThresholdValue )
00066       {
00067       m_IsForeground = true;
00068       }
00069   }
00070 
00071   inline TOutputPixel GetValue()
00072   {
00073     if ( m_IsForeground )
00074       {
00075       return (TOutputPixel)m_ForegroundValue;
00076       }
00077     else
00078       {
00079       return m_BackgroundValue;
00080       }
00081   }
00082 
00083   bool m_IsForeground;
00084 
00085   TInputPixel  m_ThresholdValue;
00086   TInputPixel  m_ForegroundValue;
00087   TOutputPixel m_BackgroundValue;
00088 };
00089 } // end namespace Function
00090 
00091 template< class TInputImage, class TOutputImage >
00092 class ITK_EXPORT BinaryThresholdProjectionImageFilter:
00093   public ProjectionImageFilter< TInputImage, TOutputImage,
00094                                 Function::BinaryThresholdAccumulator<
00095                                   typename TInputImage::PixelType,
00096                                   typename TOutputImage::PixelType > >
00097 {
00098 public:
00099   typedef BinaryThresholdProjectionImageFilter Self;
00100   typedef ProjectionImageFilter< TInputImage, TOutputImage,
00101                                  Function::BinaryThresholdAccumulator<
00102                                    typename TInputImage::PixelType,
00103                                    typename TOutputImage::PixelType > > Superclass;
00104 
00105   typedef SmartPointer< Self >       Pointer;
00106   typedef SmartPointer< const Self > ConstPointer;
00107 
00109   itkTypeMacro(BinaryThresholdProjectionImageFilter, ProjectionImageFilter);
00110 
00112   itkNewMacro(Self);
00113 
00115   typedef TInputImage  InputImageType;
00116   typedef TOutputImage OutputImageType;
00117 
00119   typedef typename InputImageType::PixelType  InputPixelType;
00120   typedef typename OutputImageType::PixelType OutputPixelType;
00121 
00122   typedef typename Superclass::AccumulatorType AccumulatorType;
00123 
00126   itkSetMacro(ForegroundValue, InputPixelType);
00127   itkGetConstMacro(ForegroundValue, InputPixelType);
00129 
00132   itkSetMacro(BackgroundValue, OutputPixelType);
00133   itkGetConstMacro(BackgroundValue, OutputPixelType);
00135 
00138   itkSetMacro(ThresholdValue, InputPixelType);
00139   itkGetConstMacro(ThresholdValue, InputPixelType);
00141 
00142 #ifdef ITK_USE_CONCEPT_CHECKING
00143 
00144   itkConceptMacro( InputPixelTypeGreaterThanComparable,
00145                    ( Concept::GreaterThanComparable< InputPixelType > ) );
00146   itkConceptMacro( InputHasNumericTraitsCheck,
00147                    ( Concept::HasNumericTraits< InputPixelType > ) );
00148 
00150 #endif
00151 protected:
00152   BinaryThresholdProjectionImageFilter()
00153   {
00154     m_ForegroundValue = NumericTraits< InputPixelType >::max();
00155     m_BackgroundValue = NumericTraits< OutputPixelType >::NonpositiveMin();
00156     m_ThresholdValue = NumericTraits< InputPixelType >::Zero;
00157   }
00159 
00160   virtual ~BinaryThresholdProjectionImageFilter() {}
00161 
00162   void PrintSelf(std::ostream & os, Indent indent) const
00163   {
00164     Superclass::PrintSelf(os, indent);
00165 
00166     typedef typename NumericTraits< InputPixelType >::PrintType
00167     InputPixelPrintType;
00168 
00169     os << indent << "ForegroundValue: "
00170        << static_cast< InputPixelPrintType >( m_ForegroundValue )
00171        << std::endl;
00172 
00173     typedef typename NumericTraits< OutputPixelType >::PrintType
00174     OutputPixelPrintType;
00175 
00176     os << indent << "BackgroundValue: "
00177        << static_cast< OutputPixelPrintType >( m_BackgroundValue )
00178        << std::endl;
00179 
00180     os << indent << "ThresholdValue: "
00181        << static_cast< InputPixelPrintType >( m_ThresholdValue )
00182        << std::endl;
00183   }
00184 
00185   virtual AccumulatorType NewAccumulator(SizeValueType size) const
00186   {
00187     AccumulatorType accumulator(size);
00188 
00189     accumulator.m_ForegroundValue = m_ForegroundValue;
00190     accumulator.m_BackgroundValue = m_BackgroundValue;
00191     accumulator.m_ThresholdValue = m_ThresholdValue;
00192     return accumulator;
00193   }
00194 
00196   InputPixelType m_ForegroundValue;
00197 
00199   OutputPixelType m_BackgroundValue;
00200 
00202   OutputPixelType m_ThresholdValue;
00203 private:
00204   //purposely not implemented
00205   BinaryThresholdProjectionImageFilter(const Self &);
00206   void operator=(const Self &);
00207 };  // end BinaryThresholdProjectionImageFilter
00208 } //end namespace itk
00210 
00211 #endif
00212