itkHoughTransform2DLinesImageFilter.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 itkHoughTransform2DLinesImageFilter_h
#define itkHoughTransform2DLinesImageFilter_h


#include "itkImageToImageFilter.h"
#include "itkLineSpatialObject.h"

namespace itk
{
template< typename TInputPixelType, typename TOutputPixelType >
class ITK_TEMPLATE_EXPORT HoughTransform2DLinesImageFilter:
  public ImageToImageFilter< Image< TInputPixelType, 2 >, Image< TOutputPixelType, 2 > >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(HoughTransform2DLinesImageFilter);

  using Self = HoughTransform2DLinesImageFilter;

  using InputImageType = Image< TInputPixelType, 2 >;
  using InputImagePointer = typename InputImageType::Pointer;
  using InputImageConstPointer = typename InputImageType::ConstPointer;

  using OutputImageType = Image< TOutputPixelType, 2 >;
  using OutputImagePointer = typename OutputImageType::Pointer;

  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  using LineType = LineSpatialObject< 2 >;
  using LinePointer = typename LineType::Pointer;
  using LinesListType = std::list< LinePointer >;
  using LinePointType = LineType::LinePointType;

  using LinesListSizeType = typename LinesListType::size_type;

  using Superclass = ImageToImageFilter< InputImageType, OutputImageType >;

  using IndexType = typename InputImageType::IndexType;

  using PixelType = typename InputImageType::PixelType;

  using OutputImageRegionType = typename InputImageType::RegionType;

  itkTypeMacro( HoughTransform2DLinesImageFilter, ImageToImageFilter );

  itkNewMacro( Self );

  void GenerateData() override;

  itkSetMacro( Threshold, double );
  itkGetConstMacro( Threshold, double );

  itkSetMacro( AngleResolution, double );
  itkGetConstMacro( AngleResolution, double );

  void Simplify();

  itkGetModifiableObjectMacro( SimplifyAccumulator, OutputImageType );

  LinesListType & GetLines();

  itkSetMacro( NumberOfLines, LinesListSizeType );
  itkGetConstMacro( NumberOfLines, LinesListSizeType );

  itkSetMacro( DiscRadius, double );
  itkGetConstMacro( DiscRadius, double );

  itkSetMacro( Variance, double );
  itkGetConstMacro( Variance, double );

#ifdef ITK_USE_CONCEPT_CHECKING
  // Begin concept checking
  itkConceptMacro( IntConvertibleToOutputCheck,
                   ( Concept::Convertible< int, TOutputPixelType > ) );
  itkConceptMacro( InputGreaterThanFloatCheck,
                   ( Concept::GreaterThanComparable< PixelType, float > ) );
  itkConceptMacro( OutputPlusIntCheck,
                   ( Concept::AdditiveOperators< TOutputPixelType, int > ) );
  // End concept checking
#endif

protected:

  HoughTransform2DLinesImageFilter();
  ~HoughTransform2DLinesImageFilter() override = default;

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

  void GenerateInputRequestedRegion() override;

  void GenerateOutputInformation() override;

  void EnlargeOutputRequestedRegion( DataObject *output ) override;

private:

  double             m_AngleResolution{ 500 };
  double             m_Threshold{ 0 };

  OutputImagePointer m_SimplifyAccumulator;
  LinesListType      m_LinesList;
  LinesListSizeType  m_NumberOfLines{ 1 };
  double             m_DiscRadius{ 10 };
  double             m_Variance{ 5 };
  ModifiedTimeType   m_OldModifiedTime{ 0 };
};
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkHoughTransform2DLinesImageFilter.hxx"
#endif

#endif