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_EXPORT CannyEdgesFeatureGenerator : public FeatureGenerator<NDimension>
{
public:
  typedef CannyEdgesFeatureGenerator                        Self;
  typedef FeatureGenerator<NDimension>                      Superclass;
  typedef SmartPointer<Self>                                Pointer;
  typedef SmartPointer<const Self>                          ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(CannyEdgesFeatureGenerator, FeatureGenerator);

  itkStaticConstMacro(Dimension, unsigned int, NDimension);

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

  typedef typename NumericTraits<InputPixelType>::ScalarRealType ScalarRealType;
  typedef FixedArray< ScalarRealType, itkGetStaticConstMacro(Dimension) > SigmaArrayType;
  
  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();
  virtual ~CannyEdgesFeatureGenerator();
  void PrintSelf(std::ostream& os, Indent indent) const;

  void  GenerateData ();

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

  typedef float                                       InternalPixelType;
  typedef Image< InternalPixelType, Dimension >       InternalImageType;

  typedef InternalPixelType                           OutputPixelType;
  typedef InternalImageType                           OutputImageType;

  typedef ImageSpatialObject< NDimension, OutputPixelType >  OutputImageSpatialObjectType;

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

  typedef IntensityWindowingImageFilter<
    InternalImageType, InternalImageType >            RescaleFilterType;
  typedef typename RescaleFilterType::Pointer         RescaleFilterPointer;

  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