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_TEMPLATE_EXPORT HessianToObjectnessMeasureImageFilter:public
  ImageToImageFilter< TInputImage, TOutputImage >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(HessianToObjectnessMeasureImageFilter);

  using Self = HessianToObjectnessMeasureImageFilter;
  using Superclass = ImageToImageFilter< TInputImage, TOutputImage >;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  using InputImageType = typename Superclass::InputImageType;
  using OutputImageType = typename Superclass::OutputImageType;
  using InputPixelType = typename InputImageType::PixelType;
  using OutputPixelType = typename OutputImageType::PixelType;
  using OutputImageRegionType = typename OutputImageType::RegionType;

  static constexpr unsigned int ImageDimension = InputImageType ::ImageDimension;

  using EigenValueType = double;
  using EigenValueArrayType = itk::FixedArray< EigenValueType, Self::ImageDimension >;

  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
  // Begin concept checking
  itkConceptMacro( DoubleConvertibleToOutputCheck, ( Concept::Convertible< double, OutputPixelType > ) );
  // End concept checking
#endif

protected:
  HessianToObjectnessMeasureImageFilter();
  ~HessianToObjectnessMeasureImageFilter() override = default;
  void PrintSelf(std::ostream & os, Indent indent) const override;

  void VerifyPreconditions() ITKv5_CONST override;

  void DynamicThreadedGenerateData(const OutputImageRegionType & outputRegionForThread) override;


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

  double       m_Alpha{0.5};
  double       m_Beta{0.5};
  double       m_Gamma{5.0};
  unsigned int m_ObjectDimension{1};
  bool         m_BrightObject{true};
  bool         m_ScaleObjectnessMeasure{true};
};
} // end namespace itk

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

#endif