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

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

  using OutputPixelType = typename TOutputImage::PixelType;
  using OutputInternalPixelType = typename TOutputImage::InternalPixelType;
  using InputPixelType = typename TInputImage::PixelType;
  using InputInternalPixelType = typename TInputImage::InternalPixelType;

  static constexpr unsigned int ImageDimension = TOutputImage::ImageDimension;

  using InputImageType = TInputImage;
  using OutputImageType = TOutputImage;

  itkNewMacro(Self);

  itkOverrideGetNameOfClassMacro(DerivativeImageFilter);

  static_assert(NumericTraits<OutputPixelType>::is_signed);

  itkSetMacro(Order, unsigned int);
  itkGetConstMacro(Order, unsigned int);
  itkSetMacro(Direction, unsigned int);
  itkGetConstMacro(Direction, unsigned int);
  itkSetMacro(UseImageSpacing, bool);
  itkGetConstMacro(UseImageSpacing, bool);
  itkBooleanMacro(UseImageSpacing);
#if !defined(ITK_FUTURE_LEGACY_REMOVE)
  void
  SetUseImageSpacingOn()
  {
    this->SetUseImageSpacing(true);
  }

  void
  SetUseImageSpacingOff()
  {
    this->SetUseImageSpacing(false);
  }
#endif

  void
  GenerateInputRequestedRegion() override;
 
protected:
  DerivativeImageFilter()
    : m_Order(1)
    , m_UseImageSpacing(true)
  {}
 
  ~DerivativeImageFilter() override = default;
  void
  PrintSelf(std::ostream & os, Indent indent) const override;

  void
  GenerateData() override;
 
private:
  unsigned int m_Order{};

  unsigned int m_Direction{};
 
  bool m_UseImageSpacing{};
};
} // end namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkDerivativeImageFilter.hxx"
#endif
 
#endif