itkHessianToObjectnessMeasureImageFilter.h

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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 __itkHessianToObjectnessMeasureImageFilter_h
#define __itkHessianToObjectnessMeasureImageFilter_h

#include "itkSymmetricSecondRankTensor.h"
#include "itkImageToImageFilter.h"

namespace itk
{
template< typename TInputImage, typename TOutputImage >
class ITK_EXPORT HessianToObjectnessMeasureImageFilter:public
  ImageToImageFilter< TInputImage, TOutputImage >
{
public:
  typedef HessianToObjectnessMeasureImageFilter Self;

  typedef ImageToImageFilter< TInputImage, TOutputImage > Superclass;

  typedef SmartPointer< Self >       Pointer;
  typedef SmartPointer< const Self > ConstPointer;

  typedef typename Superclass::InputImageType  InputImageType;
  typedef typename Superclass::OutputImageType OutputImageType;
  typedef typename InputImageType::PixelType   InputPixelType;
  typedef typename OutputImageType::PixelType  OutputPixelType;
  typedef typename OutputImageType::RegionType OutputImageRegionType;

  itkStaticConstMacro(ImageDimension, unsigned int, ::itk::GetImageDimension< InputImageType >::ImageDimension);

  typedef double                                                                    EigenValueType;
  typedef itk::FixedArray< EigenValueType, itkGetStaticConstMacro(ImageDimension) > EigenValueArrayType;

  itkNewMacro(Self);

  itkTypeMacro(HessianToObjectnessMeasureImageFilter, ImageToImageFilter);

  itkSetMacro(Alpha, double);
  itkGetConstMacro(Alpha, double);

  itkSetMacro(Beta, double);
  itkGetConstMacro(Beta, double);

  itkSetMacro(Gamma, double);
  itkGetConstMacro(Gamma, double);

  itkSetMacro(ScaleObjectnessMeasure, bool);
  itkGetConstMacro(ScaleObjectnessMeasure, bool);
  itkBooleanMacro(ScaleObjectnessMeasure);

  itkSetMacro(ObjectDimension, unsigned int);
  itkGetConstMacro(ObjectDimension, unsigned int);

  itkSetMacro(BrightObject, bool);
  itkGetConstMacro(BrightObject, bool);
  itkBooleanMacro(BrightObject);

#ifdef ITK_USE_CONCEPT_CHECKING

  itkConceptMacro( DoubleConvertibleToOutputCheck, ( Concept::Convertible< double, OutputPixelType > ) );

#endif
protected:
  HessianToObjectnessMeasureImageFilter();
  ~HessianToObjectnessMeasureImageFilter() {}
  void PrintSelf(std::ostream & os, Indent indent) const;

  void BeforeThreadedGenerateData(void);

  void ThreadedGenerateData(const OutputImageRegionType & outputRegionForThread, ThreadIdType threadId);

private:
  HessianToObjectnessMeasureImageFilter(const Self &); //purposely not
                                                       // implemented
  void operator=(const Self &);                        //purposely not
                                                       // implemented

  // functor used to sort the eigenvalues are to be sorted
  // |e1|<=|e2|<=...<=|eN|
  struct AbsLessEqualCompare {
    bool operator()(EigenValueType a, EigenValueType b)
    {
      return vnl_math_abs(a) <= vnl_math_abs(b);
    }
  };

  double       m_Alpha;
  double       m_Beta;
  double       m_Gamma;
  unsigned int m_ObjectDimension;
  bool         m_BrightObject;
  bool         m_ScaleObjectnessMeasure;
};
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkHessianToObjectnessMeasureImageFilter.hxx"
#endif

#endif