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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#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
* \ingroup ITKEigen
*/
template< typename TInputImage, typename TEigenValueImage, typename TEigenVectorImage >
class ITK_TEMPLATE_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();
/** Get the Output image with the smallest eigenvalue */
EigenValueImageType * GetMinEigenValue();
/** Get the Output image with the eigen vector associated with
* the greatest eigen value */
EigenVectorImageType * GetMaxEigenVector();
/** Create the Output */
typedef ProcessObject::DataObjectPointerArraySizeType DataObjectPointerArraySizeType;
using Superclass::MakeOutput;
DataObject::Pointer MakeOutput(DataObjectPointerArraySizeType idx) ITK_OVERRIDE;
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro( VectorComponentHasNumericTraitsCheck,
( Concept::HasNumericTraits< VectorComponentType > ) );
// End concept checking
#endif
protected:
EigenAnalysis2DImageFilter();
virtual ~EigenAnalysis2DImageFilter() ITK_OVERRIDE {}
void GenerateData(void) ITK_OVERRIDE;
private:
ITK_DISALLOW_COPY_AND_ASSIGN(EigenAnalysis2DImageFilter);
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkEigenAnalysis2DImageFilter.hxx"
#endif
#endif
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