itkImagePCADecompositionCalculator.h

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/*=========================================================================

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkImagePCADecompositionCalculator.h,v $
  Language:  C++
  Date:      $Date: 2005-03-21 23:04:03 $
  Version:   $Revision: 1.5 $

  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/

#ifndef __itkImagePCADecompositionCalculator_h
#define __itkImagePCADecompositionCalculator_h

#include "itkObject.h"
#include "itkImagePCAShapeModelEstimator.h"
#include "vnl/vnl_vector.h"
#include "vnl/vnl_matrix.h"

namespace itk
{

template <class TInputImage, 
    class TBasisImage = Image<double, ::itk::GetImageDimension<TInputImage>::ImageDimension> >
class ITK_EXPORT ImagePCADecompositionCalculator : public Object 
{
public:
  typedef ImagePCADecompositionCalculator Self;
  typedef Object  Superclass;
  typedef SmartPointer<Self>   Pointer;
  typedef SmartPointer<const Self>  ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(ImagePCADecompositionCalculator, Object);

  typedef TInputImage  InputImageType;
  typedef TBasisImage  BasisImageType;

  typedef typename TInputImage::Pointer  InputImagePointer;
  typedef typename TBasisImage::Pointer  BasisImagePointer;

  typedef typename TInputImage::ConstPointer InputImageConstPointer;
  typedef typename TBasisImage::ConstPointer BasisImageConstPointer;

  typedef typename TBasisImage::PixelType BasisPixelType;

  itkStaticConstMacro(InputImageDimension, unsigned int,
                      TInputImage::ImageDimension); 

  itkStaticConstMacro(BasisImageDimension, unsigned int,
                      TBasisImage::ImageDimension); 

  
  typedef std::vector< BasisImagePointer > BasisImagePointerVector;

  typedef vnl_matrix<BasisPixelType> BasisMatrixType;
  typedef vnl_vector<BasisPixelType> BasisVectorType;

  itkSetConstObjectMacro(Image, InputImageType);
  itkGetConstObjectMacro(Image, InputImageType);

  itkSetConstObjectMacro(MeanImage, BasisImageType);
  itkGetConstObjectMacro(MeanImage, BasisImageType);

  void SetBasisImages(const BasisImagePointerVector &);
  BasisImagePointerVector GetBasisImages() { return m_BasisImages; }

  typedef typename ImagePCAShapeModelEstimator<TInputImage,
    TBasisImage>::Pointer ModelPointerType;

  void SetBasisFromModel(ModelPointerType model);

  void Compute(void);

  itkGetMacro(Projection,BasisVectorType);


protected:
  ImagePCADecompositionCalculator();
  virtual ~ImagePCADecompositionCalculator() {};
  void PrintSelf(std::ostream& os, Indent indent) const;
  void CalculateBasisMatrix(void);
  void CalculateRecenteredImageAsVector(void);
  
private:
  typedef typename BasisImageType::SizeType BasisSizeType;
    
  ImagePCADecompositionCalculator(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented
  
  BasisVectorType m_Projection;
  BasisVectorType m_ImageAsVector;
  BasisImagePointerVector  m_BasisImages;
  BasisImageConstPointer m_MeanImage;
  BasisSizeType m_Size;
  InputImageConstPointer  m_Image;
  BasisMatrixType  m_BasisMatrix;
  bool m_BasisMatrixCalculated;
  unsigned long m_NumPixels;
};

} // end namespace itk


#ifndef ITK_MANUAL_INSTANTIATION
#include "itkImagePCADecompositionCalculator.txx"
#endif

#endif

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