itkHoughTransform2DLinesImageFilter.h

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/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  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
 *
 *         https://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_MOVE(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;

  itkOverrideGetNameOfClassMacro(HoughTransform2DLinesImageFilter);

  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);
 
  itkConceptMacro(IntConvertibleToOutputCheck, (Concept::Convertible<int, TOutputPixelType>));
  itkConceptMacro(InputGreaterThanFloatCheck, (Concept::GreaterThanComparable<PixelType, float>));
  itkConceptMacro(OutputPlusIntCheck, (Concept::AdditiveOperators<TOutputPixelType, int>));
 
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