itkComposeDisplacementFieldsImageFilter.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 itkComposeDisplacementFieldsImageFilter_h
#define itkComposeDisplacementFieldsImageFilter_h
 
#include "itkImageToImageFilter.h"
#include "itkVectorInterpolateImageFunction.h"
 
namespace itk
{

 
template <typename TInputImage, typename TOutputImage = TInputImage>
class ITK_TEMPLATE_EXPORT ComposeDisplacementFieldsImageFilter : public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(ComposeDisplacementFieldsImageFilter);
 
  using Self = ComposeDisplacementFieldsImageFilter;
  using Superclass = ImageToImageFilter<TInputImage, TOutputImage>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  itkNewMacro(Self);

  static constexpr unsigned int ImageDimension = TInputImage::ImageDimension;
 
  using InputFieldType = TInputImage;
  using OutputFieldType = TOutputImage;

  using PixelType = typename OutputFieldType::PixelType;
  using VectorType = typename OutputFieldType::PixelType;
  using RegionType = typename OutputFieldType::RegionType;
  using IndexType = typename OutputFieldType::IndexType;
 
  using PointType = typename OutputFieldType::PointType;
  using SpacingType = typename OutputFieldType::SpacingType;
  using OriginType = typename OutputFieldType::PointType;
  using SizeType = typename OutputFieldType::SizeType;
  using DirectionType = typename OutputFieldType::DirectionType;

  using RealType = typename VectorType::ComponentType;
  using InterpolatorType = VectorInterpolateImageFunction<InputFieldType, RealType>;

  itkGetModifiableObjectMacro(Interpolator, InterpolatorType);

  void
  SetDisplacementField(const InputFieldType * field)
  {
    itkDebugMacro("setting displacement field to " << field);
    if (field != this->GetInput(0))
    {
      this->SetInput(0, field);
      this->Modified();
      if (!this->m_Interpolator.IsNull())
      {
        this->m_Interpolator->SetInputImage(field);
      }
    }
  }

  const InputFieldType *
  GetDisplacementField() const
  {
    return this->GetInput(0);
  }

  void
  SetWarpingField(const InputFieldType * field)
  {
    itkDebugMacro("setting warping field to " << field);
    if (field != this->GetInput(1))
    {
      this->SetInput(1, field);
    }
  }

  const InputFieldType *
  GetWarpingField() const
  {
    return this->GetInput(1);
  }
 
  /* Set the interpolator. */
  virtual void
  SetInterpolator(InterpolatorType * interpolator);
 
protected:
  ComposeDisplacementFieldsImageFilter();

  ~ComposeDisplacementFieldsImageFilter() override = default;

  void
  PrintSelf(std::ostream & os, Indent indent) const override;

  void
  BeforeThreadedGenerateData() override;

  void
  DynamicThreadedGenerateData(const RegionType &) override;
 
 
private:
  typename InterpolatorType::Pointer m_Interpolator{};
};
 
} // end namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkComposeDisplacementFieldsImageFilter.hxx"
#endif
 
#endif