itkRobustAutomaticThresholdImageFilter.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 itkRobustAutomaticThresholdImageFilter_h
#define itkRobustAutomaticThresholdImageFilter_h
 
#include "itkImageToImageFilter.h"
#include "itkRobustAutomaticThresholdCalculator.h"
 
namespace itk
{
 
template <typename TInputImage, typename TGradientImage = TInputImage, typename TOutputImage = TInputImage>
class ITK_TEMPLATE_EXPORT RobustAutomaticThresholdImageFilter : public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(RobustAutomaticThresholdImageFilter);

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

  itkNewMacro(Self);

  itkOverrideGetNameOfClassMacro(RobustAutomaticThresholdImageFilter);

  using InputImageType = TInputImage;
  using GradientImageType = TGradientImage;

  using InputPixelType = typename TInputImage::PixelType;
  using OutputPixelType = typename TOutputImage::PixelType;
  using GradientPixelType = typename TGradientImage::PixelType;

  using InputImagePointer = typename TInputImage::Pointer;
  using OutputImagePointer = typename TOutputImage::Pointer;
  using GradientImagePointer = typename TGradientImage::Pointer;
 
  using InputSizeType = typename TInputImage::SizeType;
  using InputIndexType = typename TInputImage::IndexType;
  using InputImageRegionType = typename TInputImage::RegionType;
  using OutputSizeType = typename TOutputImage::SizeType;
  using OutputIndexType = typename TOutputImage::IndexType;
  using OutputImageRegionType = typename TOutputImage::RegionType;
 
  using CalculatorType = RobustAutomaticThresholdCalculator<TInputImage, TGradientImage>;

  static constexpr unsigned int InputImageDimension = TInputImage::ImageDimension;
  static constexpr unsigned int OutputImageDimension = TOutputImage::ImageDimension;

  itkSetMacro(OutsideValue, OutputPixelType);

  itkGetConstMacro(OutsideValue, OutputPixelType);

  itkSetMacro(InsideValue, OutputPixelType);

  itkGetConstMacro(InsideValue, OutputPixelType);

  itkGetConstMacro(Threshold, InputPixelType);
 
  itkSetMacro(Pow, double);
  itkGetConstMacro(Pow, double);
 
  itkConceptMacro(OutputComparableCheck, (Concept::Comparable<OutputPixelType>));
  itkConceptMacro(OutputOStreamWritableCheck, (Concept::OStreamWritable<OutputPixelType>));

  void
  SetGradientImage(GradientImageType * input)
  {
    // Process object is not const-correct so the const casting is required.
    this->SetNthInput(1, const_cast<GradientImageType *>(input));
  }

  GradientImageType *
  GetGradientImage()
  {
    return static_cast<GradientImageType *>(const_cast<DataObject *>(this->ProcessObject::GetInput(1)));
  }

  void
  SetInput1(TInputImage * input)
  {
    this->SetInput(input);
  }

  void
  SetInput2(GradientImageType * input)
  {
    this->SetGradientImage(input);
  }
 
protected:
  RobustAutomaticThresholdImageFilter();
  ~RobustAutomaticThresholdImageFilter() override = default;
  void
  PrintSelf(std::ostream & os, Indent indent) const override;
 
  void
  GenerateInputRequestedRegion() override;
 
  void
  GenerateData() override;
 
private:
  double          m_Pow{ 1 };
  InputPixelType  m_Threshold{};
  OutputPixelType m_InsideValue{};
  OutputPixelType m_OutsideValue{};
};
} // end namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkRobustAutomaticThresholdImageFilter.hxx"
#endif
 
#endif