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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkEigenAnalysis2DImageFilter.h,v $
Language: C++
Date: $Date: 2007-10-27 19:51:42 $
Version: $Revision: 1.16 $
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 __itkEigenAnalysis2DImageFilter_h
#define __itkEigenAnalysis2DImageFilter_h
#include "itkImageToImageFilter.h"
namespace itk {
/** \class EigenAnalysis2DImageFilter
* \brief Computes pixel-wise the eigen values and eigen vectors
* of a 2D symmetrical matrix.
*
* The filter expects three inputs images { A, B, C } representing
* the component of the matrix
*
* | A B |
* | B c |
*
* The eigen values are stored in two output images, and the eigen
* vector associated with the maximum eigenvalue is stored in an
* image using vector as pixel type.
*
* \ingroup ShouldBeThreaded IntensityImageFilters
*/
template <class TInputImage, class TEigenValueImage, class TEigenVectorImage >
class ITK_EXPORT EigenAnalysis2DImageFilter:
public ImageToImageFilter<TInputImage,TEigenValueImage>
{
public:
/** Standard class typedefs. */
typedef EigenAnalysis2DImageFilter Self;
typedef ImageToImageFilter<TInputImage,TEigenValueImage> Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Run-time type information (and related methods). */
itkTypeMacro( EigenAnalysis2DImageFilter, ImageToImageFilter );
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Typedef for the vector type representing the eigen vectors */
typedef typename TEigenVectorImage::PixelType EigenVectorType;
typedef typename EigenVectorType::ValueType VectorComponentType;
/** Superclass typedefs. */
typedef typename Superclass::OutputImageRegionType OutputImageRegionType;
/** Some convenient typedefs. */
typedef TEigenValueImage EigenValueImageType;
typedef typename EigenValueImageType::Pointer EigenValueImagePointer;
typedef typename EigenValueImageType::RegionType EigenValueImageRegionType;
typedef typename EigenValueImageType::PixelType EigenValueImagePixelType;
typedef TEigenVectorImage EigenVectorImageType;
typedef typename EigenVectorImageType::Pointer EigenVectorImagePointer;
typedef typename EigenVectorImageType::RegionType EigenVectorImageRegionType;
typedef typename EigenVectorImageType::PixelType EigenVectorImagePixelType;
/** Image dimension. */
itkStaticConstMacro(ImageDimension, unsigned int,
TInputImage::ImageDimension);
/** Connect the image containting the elements [0,0]
* of the input 2D matrix */
void SetInput1( TInputImage * image1);
/** Connect the image containting the elements [0,1]
* of the input 2D matrix. This is the same [1,0]
* element given that the input matrix is expected
* to be symmetric */
void SetInput2( TInputImage * image2);
/** Connect the image containting the elements [1,1]
* of the input 2D matrix */
void SetInput3( TInputImage * image3);
/** Get the Output image with the greatest eigenvalue */
EigenValueImageType * GetMaxEigenValue( void );
/** Get the Output image with the smallest eigenvalue */
EigenValueImageType * GetMinEigenValue( void );
/** Get the Output image with the eigen vector associated with
* the greatest eigen value */
EigenVectorImageType * GetMaxEigenVector( void );
/** Create the Output */
DataObject::Pointer MakeOutput(unsigned int idx);
#ifdef ITK_USE_CONCEPT_CHECKING
/** Begin concept checking */
itkConceptMacro(VectorComponentHasNumericTraitsCheck,
(Concept::HasNumericTraits<VectorComponentType>));
/** End concept checking */
#endif
protected:
EigenAnalysis2DImageFilter();
virtual ~EigenAnalysis2DImageFilter() {};
void GenerateData( void );
private:
EigenAnalysis2DImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkEigenAnalysis2DImageFilter.txx"
#endif
#endif
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