otbLocalHistogramImageFunction.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 otbLocalHistogramImageFunction_h
#define otbLocalHistogramImageFunction_h
 
#include "itkImageFunction.h"
#include "itkHistogram.h"
#include "itkNumericTraits.h"
 
namespace otb
{
 
template <class TInputImage, class TCoordRep = double>
class ITK_EXPORT LocalHistogramImageFunction
    : public itk::ImageFunction<TInputImage, typename itk::Statistics::Histogram<typename TInputImage::PixelType>::Pointer, TCoordRep>
{
public:
  typedef LocalHistogramImageFunction Self;
  typedef itk::ImageFunction<TInputImage, typename itk::Statistics::Histogram<typename TInputImage::PixelType>::Pointer, TCoordRep> Superclass;
  typedef itk::SmartPointer<Self>       Pointer;
  typedef itk::SmartPointer<const Self> ConstPointer;
 
  itkTypeMacro(LocalHistogramImageFunction, ImageFunction);
 
  itkNewMacro(Self);
 
  typedef TInputImage                              InputImageType;
  typedef typename Superclass::IndexType           IndexType;
  typedef typename Superclass::ContinuousIndexType ContinuousIndexType;
  typedef typename Superclass::PointType           PointType;
 
  typedef typename Superclass::OutputType                             OutputType;
  typedef itk::Statistics::Histogram<typename TInputImage::PixelType> HistogramType;
  typedef typename HistogramType::Pointer                             HistogramPointer;
 
  typedef TCoordRep CoordRepType;
 
  itkStaticConstMacro(ImageDimension, unsigned int, InputImageType::ImageDimension);
 
  OutputType EvaluateAtIndex(const IndexType& index) const override;
 
  OutputType Evaluate(const PointType& point) const override
  {
    IndexType index;
    this->ConvertPointToNearestIndex(point, index);
    return this->EvaluateAtIndex(index);
  }
  OutputType EvaluateAtContinuousIndex(const ContinuousIndexType& cindex) const override
  {
    IndexType index;
    this->ConvertContinuousIndexToNearestIndex(cindex, index);
    return this->EvaluateAtIndex(index);
  }
 
  itkSetMacro(NeighborhoodRadius, unsigned int);
  itkGetConstReferenceMacro(NeighborhoodRadius, unsigned int);
 
  itkSetClampMacro(NumberOfHistogramBins, unsigned long, 1, itk::NumericTraits<unsigned long>::max());
  itkGetConstMacro(NumberOfHistogramBins, unsigned long);
 
  itkSetMacro(HistogramMin, double);
  itkGetConstReferenceMacro(HistogramMin, double);
 
  itkSetMacro(HistogramMax, double);
  itkGetConstReferenceMacro(HistogramMax, double);
 
  itkSetMacro(GaussianSmoothing, bool);
  itkGetConstReferenceMacro(GaussianSmoothing, bool);
  itkBooleanMacro(GaussianSmoothing);
 
protected:
  LocalHistogramImageFunction();
  ~LocalHistogramImageFunction() override
  {
  }
  void PrintSelf(std::ostream& os, itk::Indent indent) const override;
 
private:
  LocalHistogramImageFunction(const Self&) = delete;
  void operator=(const Self&) = delete;
 
  unsigned int  m_NeighborhoodRadius;
  unsigned long m_NumberOfHistogramBins;
  double        m_HistogramMin;
  double        m_HistogramMax;
  bool          m_GaussianSmoothing;
};
 
} // namespace otb
 
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbLocalHistogramImageFunction.hxx"
#endif
 
#endif