itkZeroCrossingImageFilter.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 itkZeroCrossingImageFilter_h
#define itkZeroCrossingImageFilter_h
 
#include "itkImageToImageFilter.h"
namespace itk
{
template <typename TInputImage, typename TOutputImage>
class ITK_TEMPLATE_EXPORT ZeroCrossingImageFilter : public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(ZeroCrossingImageFilter);

  using Self = ZeroCrossingImageFilter;
  using Superclass = ImageToImageFilter<TInputImage, TOutputImage>;

  using InputImageType = TInputImage;
  using OutputImageType = TOutputImage;

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

  using InputImagePixelType = typename TInputImage::PixelType;
  using OutputImagePixelType = typename TOutputImage::PixelType;

  itkNewMacro(Self);

  using OutputImageRegionType = typename TOutputImage::RegionType;

  itkOverrideGetNameOfClassMacro(ZeroCrossingImageFilter);

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

  void
  GenerateInputRequestedRegion() override;

  itkSetMacro(ForegroundValue, OutputImagePixelType);
  itkGetConstMacro(ForegroundValue, OutputImagePixelType);

  itkSetMacro(BackgroundValue, OutputImagePixelType);
  itkGetConstMacro(BackgroundValue, OutputImagePixelType);
 
  itkConceptMacro(OutputEqualityComparableCheck, (Concept::EqualityComparable<OutputImagePixelType>));
  itkConceptMacro(SameDimensionCheck, (Concept::SameDimension<ImageDimension, OutputImageDimension>));
  itkConceptMacro(InputComparableCheck, (Concept::Comparable<InputImagePixelType>));
  itkConceptMacro(OutputOStreamWritableCheck, (Concept::OStreamWritable<OutputImagePixelType>));
 
protected:
  ZeroCrossingImageFilter();
  ~ZeroCrossingImageFilter() override = default;
  void
  PrintSelf(std::ostream & os, Indent indent) const override;
 
  OutputImagePixelType m_BackgroundValue{};
  OutputImagePixelType m_ForegroundValue{};

  void
  DynamicThreadedGenerateData(const OutputImageRegionType & outputRegionForThread) override;
};
} // end of namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkZeroCrossingImageFilter.hxx"
#endif
 
#endif