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itkBackPropagationLayer.h

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00001 /*=========================================================================
00002 
00003 Program:   Insight Segmentation & Registration Toolkit
00004 Module:    $RCSfile: itkBackPropagationLayer.h,v $
00005 Language:  C++
00006 Date:      $Date: 2007-08-17 13:10:57 $
00007 Version:   $Revision: 1.7 $
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 __itkBackPropagationLayerBase_h
00018 #define __itkBackPropagationLayerBase_h
00019 
00020 #include "itkCompletelyConnectedWeightSet.h"
00021 #include "itkLayerBase.h"
00022 #include "itkObject.h"
00023 #include "itkMacro.h"
00024 
00025 namespace itk
00026 {
00027   namespace Statistics
00028     {
00029     template<class TMeasurementVector, class TTargetVector>
00030       class BackPropagationLayer : public LayerBase<TMeasurementVector, TTargetVector>
00031         {
00032       public:
00033         typedef BackPropagationLayer Self;
00034         typedef LayerBase<TMeasurementVector, TTargetVector> Superclass;
00035         typedef SmartPointer<Self> Pointer;
00036         typedef SmartPointer<const Self> ConstPointer;
00037 
00039         itkTypeMacro(BackPropagationLayer, LayerBase);
00040         itkNewMacro(Self);
00042 
00043         typedef typename Superclass::ValueType ValueType;
00044         typedef vnl_vector<ValueType> NodeVectorType;
00045         typedef typename Superclass::InternalVectorType InternalVectorType;
00046         typedef typename Superclass::OutputVectorType OutputVectorType;
00047         typedef typename Superclass::LayerInterfaceType LayerInterfaceType;
00048         typedef CompletelyConnectedWeightSet<TMeasurementVector,TTargetVector> WeightSetType;
00049 
00050         typedef typename Superclass::WeightSetInterfaceType WeightSetInterfaceType;
00051         typedef typename Superclass::InputFunctionInterfaceType InputFunctionInterfaceType;
00052         typedef typename Superclass::TransferFunctionInterfaceType TransferFunctionInterfaceType;
00053         //Member Functions
00054         virtual void SetNumberOfNodes(unsigned int numNodes);
00055         virtual ValueType GetInputValue(unsigned int i) const;
00056         virtual void SetInputValue(unsigned int i, ValueType value);
00057 
00058         virtual ValueType GetOutputValue(unsigned int) const;
00059         virtual void SetOutputValue(unsigned int, ValueType);
00060 
00061         virtual ValueType * GetOutputVector();
00062         void SetOutputVector(TMeasurementVector value);
00063 
00064         virtual void ForwardPropagate();
00065         virtual void ForwardPropagate(TMeasurementVector input);
00066 
00067         virtual void BackwardPropagate();
00068         virtual void BackwardPropagate(InternalVectorType errors);
00069 
00070         virtual void SetOutputErrorValues(TTargetVector);
00071         virtual ValueType GetOutputErrorValue(unsigned int node_id) const;
00072 
00073         virtual ValueType GetInputErrorValue(unsigned int node_id) const;
00074         virtual ValueType * GetInputErrorVector();
00075         virtual void SetInputErrorValue(ValueType, unsigned int node_id);
00076 
00077         virtual ValueType Activation(ValueType);
00078         virtual ValueType DActivation(ValueType);
00079 
00081         itkSetMacro( Bias, ValueType );
00082         itkGetConstReferenceMacro( Bias, ValueType );
00084 
00085       protected:
00086 
00087         BackPropagationLayer();
00088         virtual ~BackPropagationLayer();
00089 
00091         virtual void PrintSelf( std::ostream& os, Indent indent ) const;
00092 
00093       private:
00094 
00095         NodeVectorType   m_NodeInputValues;
00096         NodeVectorType   m_NodeOutputValues;
00097         NodeVectorType   m_InputErrorValues;
00098         NodeVectorType   m_OutputErrorValues;
00099         ValueType        m_Bias;
00100         };
00101 
00102     } // end namespace Statistics
00103 } // end namespace itk
00104 
00105 #ifndef ITK_MANUAL_INSTANTIATION
00106 #include "itkBackPropagationLayer.txx"
00107 #endif
00108 
00109 #endif
00110 

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