itkBinaryNotImageFilter.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 itkBinaryNotImageFilter_h
#define itkBinaryNotImageFilter_h
 
#include "itkUnaryFunctorImageFilter.h"
#include "itkNumericTraits.h"
 
 
namespace itk
{

namespace Functor
{
 
template <typename TPixel>
class BinaryNot
{
public:
  bool
  operator==(const BinaryNot &) const
  {
    return true;
  }
 
  ITK_UNEQUAL_OPERATOR_MEMBER_FUNCTION(BinaryNot);
 
  inline TPixel
  operator()(const TPixel & A) const
  {
    const bool a = (A == m_ForegroundValue);
    if (!a)
    {
      return m_ForegroundValue;
    }
    return m_BackgroundValue;
  }
 
  TPixel m_ForegroundValue;
  TPixel m_BackgroundValue;
};
 
} // namespace Functor
template <typename TImage>
class BinaryNotImageFilter
  : public UnaryFunctorImageFilter<TImage, TImage, Functor::BinaryNot<typename TImage::PixelType>>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(BinaryNotImageFilter);

  using Self = BinaryNotImageFilter;
  using Superclass = UnaryFunctorImageFilter<TImage, TImage, Functor::BinaryNot<typename TImage::PixelType>>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  itkNewMacro(Self);

  itkOverrideGetNameOfClassMacro(BinaryNotImageFilter);
 
  using PixelType = typename TImage::PixelType;

  itkSetMacro(ForegroundValue, PixelType);
  itkGetConstMacro(ForegroundValue, PixelType);

  itkSetMacro(BackgroundValue, PixelType);
  itkGetConstMacro(BackgroundValue, PixelType);
 
protected:
  BinaryNotImageFilter()
  {
    m_ForegroundValue = NumericTraits<PixelType>::max();
    m_BackgroundValue = NumericTraits<PixelType>::NonpositiveMin();
  }
  ~BinaryNotImageFilter() override = default;
 
  void
  PrintSelf(std::ostream & os, Indent indent) const override
  {
    Superclass::PrintSelf(os, indent);
 
    using PixelPrintType = typename NumericTraits<PixelType>::PrintType;
 
    os << indent << "ForegroundValue: " << static_cast<PixelPrintType>(m_ForegroundValue) << std::endl;
 
    os << indent << "BackgroundValue: " << static_cast<PixelPrintType>(m_BackgroundValue) << std::endl;
  }
 
  void
  GenerateData() override
  {
    this->GetFunctor().m_ForegroundValue = m_ForegroundValue;
    this->GetFunctor().m_BackgroundValue = m_BackgroundValue;
    Superclass::GenerateData();
  }
 
private:
  PixelType m_ForegroundValue{};
  PixelType m_BackgroundValue{};
};
 
} // end namespace itk
 
 
#endif