itkCannyEdgesFeatureGenerator.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    itkCannyEdgesFeatureGenerator.h
  Language:  C++
  Date:      $Date$
  Version:   $Revision$

  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 itkCannyEdgesFeatureGenerator_h
#define itkCannyEdgesFeatureGenerator_h

#include "itkFeatureGenerator.h"
#include "itkImage.h"
#include "itkImageSpatialObject.h"
#include "itkCastImageFilter.h"
#include "itkCannyEdgeDetectionRecursiveGaussianImageFilter.h"
#include "itkIntensityWindowingImageFilter.h"

namespace itk
{

template <unsigned int NDimension>
class ITK_TEMPLATE_EXPORT CannyEdgesFeatureGenerator : public FeatureGenerator<NDimension>
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(CannyEdgesFeatureGenerator);

  using Self = CannyEdgesFeatureGenerator;
  using Superclass = FeatureGenerator<NDimension>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  itkNewMacro(Self);

  itkTypeMacro(CannyEdgesFeatureGenerator, FeatureGenerator);

  static constexpr unsigned int Dimension = NDimension;

  using InputPixelType = signed short;
  using InputImageType = Image< InputPixelType, Dimension >;
  using InputImageSpatialObjectType = ImageSpatialObject< NDimension, InputPixelType >;
  using InputImageSpatialObjectPointer = typename InputImageSpatialObjectType::Pointer;
  using SpatialObjectType = typename Superclass::SpatialObjectType;

  using ScalarRealType = typename NumericTraits<InputPixelType>::ScalarRealType;
  using SigmaArrayType = FixedArray< ScalarRealType, itkGetStaticConstMacro(Dimension) >;

  using ProcessObject::SetInput;
  void SetInput( const SpatialObjectType * input );
  const SpatialObjectType * GetInput() const;

  const SpatialObjectType * GetFeature() const;

  void SetSigmaArray( const SigmaArrayType & sigmas );
  void SetSigma( ScalarRealType sigma );
  SigmaArrayType GetSigmaArray() const;
  ScalarRealType GetSigma() const;

  itkSetMacro( UpperThreshold, double );
  itkGetMacro( UpperThreshold, double );
  itkSetMacro( LowerThreshold, double );
  itkGetMacro( LowerThreshold, double );

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

  void  GenerateData () override;

private:
  using InternalPixelType = float;
  using InternalImageType = Image< InternalPixelType, Dimension >;

  using OutputPixelType = InternalPixelType;
  using OutputImageType = InternalImageType;

  using OutputImageSpatialObjectType = ImageSpatialObject< NDimension, OutputPixelType >;

  using CastFilterType = CastImageFilter<
    InputImageType, InternalImageType >;
  using CastFilterPointer = typename CastFilterType::Pointer;
  using CannyEdgeFilterType = CannyEdgeDetectionRecursiveGaussianImageFilter<
    InternalImageType, InternalImageType >;
  using CannyEdgeFilterPointer = typename CannyEdgeFilterType::Pointer;

  using RescaleFilterType = IntensityWindowingImageFilter<
    InternalImageType, InternalImageType >;
  using RescaleFilterPointer = typename RescaleFilterType::Pointer;

  CastFilterPointer                   m_CastFilter;
  RescaleFilterPointer                m_RescaleFilter;
  CannyEdgeFilterPointer              m_CannyFilter;

  double                              m_UpperThreshold;
  double                              m_LowerThreshold;

  SigmaArrayType                      m_Sigma;
};

} // end namespace itk

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

#endif