File: itkPolylineMaskImageFilter.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 itkPolylineMaskImageFilter_h
#define itkPolylineMaskImageFilter_h

#include "itkImageToImageFilter.h"
#include "itkImageRegionIteratorWithIndex.h"

namespace itk
{
/**
 * \class PolylineMaskImageFilter
 * \brief Implements image masking operation constrained by a polyline on a plane
 * perpendicular to certain viewing direction.
 *
 * This class is parameterized over the types of the input image, polyline, vector
 * and output image.
 *
 * \ingroup ImageToImageFilter
 * \ingroup ITKImageIntensity
 */
template <typename TInputImage, typename TPolyline, typename TVector, typename TOutputImage>
class ITK_TEMPLATE_EXPORT PolylineMaskImageFilter : public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(PolylineMaskImageFilter);

  /** Standard class type aliases. */
  using Self = PolylineMaskImageFilter;
  using Superclass = ImageToImageFilter<TInputImage, TOutputImage>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  /** Method for creation through the object factory. */
  itkNewMacro(Self);

  /** \see LightObject::GetNameOfClass() */
  itkOverrideGetNameOfClassMacro(PolylineMaskImageFilter);

  /** Number of dimensions. */
  static constexpr unsigned int NDimensions = TInputImage::ImageDimension;

  static constexpr unsigned int InputDimension = 3;

  /** Some convenient type alias for input image. */
  using InputImageType = TInputImage;
  using InputImagePointer = typename InputImageType::ConstPointer;
  using InputImageRegionType = typename InputImageType::RegionType;
  using InputImagePixelType = typename InputImageType::PixelType;
  using PointType = Point<double, 3>;
  using ProjPlanePointType = Point<double, 2>;

  /** Standard matrix type for this class. */
  using MatrixType = Matrix<double, Self::InputDimension, Self::InputDimension>;

  /** type alias for the vector type. */
  using VectorType = TVector;

  /** type alias for the polyline type. */
  using PolylineType = TPolyline;

  /** type alias for the output image. */
  using OutputImageType = TOutputImage;
  using OutputImagePointer = typename OutputImageType::Pointer;
  using OutputImageRegionType = typename OutputImageType::RegionType;
  using OutputImagePixelType = typename OutputImageType::PixelType;

  /** Set input image. */
  void
  SetInput1(const InputImageType * input);

  /** Set input polyline. */
  void
  SetInput2(const PolylineType * input);

  /** Set/Get viewing direction vector. */
  itkSetMacro(ViewVector, VectorType);
  itkGetConstMacro(ViewVector, VectorType);

  /** Set/Get up direction vector. */
  itkSetMacro(UpVector, VectorType);
  itkGetConstMacro(UpVector, VectorType);

  /** Set/Get camera center point. */
  itkSetMacro(CameraCenterPoint, PointType);
  itkGetConstMacro(CameraCenterPoint, PointType);

  /** Set/Get focal distance of the camera. */
  itkSetMacro(FocalDistance, double);
  itkGetConstMacro(FocalDistance, double);

  /** Set/Get camera focal point on the projection plane. */
  itkSetMacro(FocalPoint, ProjPlanePointType);
  itkGetConstMacro(FocalPoint, ProjPlanePointType);

  /** Generate 3D rotation matrix using the viewing and up vectors. */
  void
  GenerateRotationMatrix();

  /** 3D rotation and perspective projection transform. */
  ProjPlanePointType
  TransformProjectPoint(PointType inputPoint);

#ifdef ITK_USE_CONCEPT_CHECKING
  // Begin concept checking
  itkConceptMacro(VectorHasNumericTraitsCheck, (Concept::HasNumericTraits<typename VectorType::ValueType>));
  // End concept checking
#endif

protected:
  PolylineMaskImageFilter();
  ~PolylineMaskImageFilter() override = default;
  void
  PrintSelf(std::ostream & os, Indent indent) const override;

  void
  GenerateData() override;

private:
  VectorType m_ViewVector{};
  VectorType m_UpVector{};

  MatrixType m_RotationMatrix{};

  PointType m_CameraCenterPoint{};

  ProjPlanePointType m_FocalPoint{};

  double m_FocalDistance{ 0.0 };
};
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkPolylineMaskImageFilter.hxx"
#endif

#endif