otbHarrisImageFilter.h

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/*
 * Copyright (C) 2005-2022 Centre National d'Etudes Spatiales (CNES)
 *
 * This file is part of Orfeo Toolbox
 *
 *     https://www.orfeo-toolbox.org/
 *
 * 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
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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 otbHarrisImageFilter_h
#define otbHarrisImageFilter_h
 
#include "itkImageToImageFilter.h"
#include "itkHessianRecursiveGaussianImageFilter.h"
#include "otbHessianToScalarImageFilter.h"
#include "otbMultiplyByScalarImageFilter.h"
#include "otbMath.h"
 
namespace otb
{
 
template <class TInputImage, class TOutputImage>
class HarrisImageFilter : public itk::ImageToImageFilter<TInputImage, TOutputImage>
{
public:
  itkStaticConstMacro(InputImageDimension, unsigned int, TInputImage::ImageDimension);
  itkStaticConstMacro(OutputImageDimension, unsigned int, TOutputImage::ImageDimension);
 
  typedef TInputImage  InputImageType;
  typedef TOutputImage OutputImageType;
 
  typedef HarrisImageFilter Self;
  typedef itk::ImageToImageFilter<InputImageType, OutputImageType> Superclass;
  typedef itk::SmartPointer<Self>       Pointer;
  typedef itk::SmartPointer<const Self> ConstPointer;
 
  itkNewMacro(Self);
 
  itkTypeMacro(HarrisImageFilter, ImageToImageFilter);
 
  typedef typename InputImageType::PixelType InputPixelType;
  typedef typename InputImageType::SizeType  SizeType;
 
  typedef typename OutputImageType::PixelType OutputPixelType;
 
  //  typedef typename InputImageType::SizeType SizeType;
 
  typedef itk::Image<itk::SymmetricSecondRankTensor<typename itk::NumericTraits<InputPixelType>::RealType, InputImageDimension>, InputImageDimension>
      TensorType;
 
  typedef itk::HessianRecursiveGaussianImageFilter<InputImageType, TensorType> HessianFilterType;
 
  typedef itk::RecursiveGaussianImageFilter<TensorType, TensorType>          GaussianFilterType;
  typedef otb::HessianToScalarImageFilter<TensorType, OutputImageType>       HessianToScalarFilterType;
  typedef otb::MultiplyByScalarImageFilter<OutputImageType, OutputImageType> MultiplyScalarFilterType;
 
  itkSetMacro(SigmaD, double);
  itkGetConstReferenceMacro(SigmaD, double);
  itkSetMacro(SigmaI, double);
  itkGetConstReferenceMacro(SigmaI, double);
  itkSetMacro(Alpha, double);
  itkGetConstReferenceMacro(Alpha, double);
 
protected:
  HarrisImageFilter();
  ~HarrisImageFilter() override
  {
  }
 
  void GenerateData() override;
 
  void PrintSelf(std::ostream& os, itk::Indent indent) const override;
 
private:
  HarrisImageFilter(const Self&) = delete;
  void operator=(const Self&) = delete;
 
  double m_SigmaD;
  double m_SigmaI;
  double m_Alpha;
 
  typename HessianFilterType::Pointer         m_HessianFilter;
  typename GaussianFilterType::Pointer        m_GaussianFilter0;
  typename GaussianFilterType::Pointer        m_GaussianFilter1;
  typename HessianToScalarFilterType::Pointer m_HessianToScalarFilter;
  typename MultiplyScalarFilterType::Pointer  m_MultiplyScalarFilter;
};
} // end namespace otb
 
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbHarrisImageFilter.hxx"
#endif
 
#endif