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/*
* Copyright (C) 2005-2017 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 otbBinaryImageDensityFunction_h
#define otbBinaryImageDensityFunction_h
#include "itkImageFunction.h"
#include "itkNumericTraits.h"
namespace otb
{
/**
* \class BinaryImageDensityFunction
* \brief Calculate the density pixel of in the neighborhood of a pixel
*
* Calculate the variance pixel value over the standard 8, 26, etc. connected
* neighborhood. This calculation uses a ZeroFluxNeumannBoundaryCondition.
*
* If called with a ContinuousIndex or Point, the calculation is performed
* at the nearest neighbor.
*
* This class is templated over the input image type and the
* coordinate representation type (e.g. float or double ).
*
* \ingroup ImageFunctions
*
* \ingroup OTBImageManipulation
*/
template <class TInputImage, class TCoordRep = float>
class ITK_EXPORT BinaryImageDensityFunction :
public itk::ImageFunction<TInputImage, typename itk::NumericTraits<typename TInputImage::PixelType>::RealType,
TCoordRep>
{
public:
/** Standard class typedefs. */
typedef BinaryImageDensityFunction Self;
typedef itk::ImageFunction<TInputImage, typename itk::NumericTraits<typename TInputImage::PixelType>::RealType,
TCoordRep> Superclass;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer<const Self> ConstPointer;
/** Run-time type information (and related methods). */
itkTypeMacro(BinaryImageDensityFunction, itk::ImageFunction);
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** InputImageType typedef support. */
typedef TInputImage InputImageType;
typedef typename InputImageType::SizeType RadiusType;
typedef typename Superclass::OutputType OutputType;
typedef typename Superclass::IndexType IndexType;
typedef typename Superclass::ContinuousIndexType ContinuousIndexType;
typedef typename Superclass::PointType PointType;
itkStaticConstMacro(ImageDimension, unsigned int, InputImageType::ImageDimension);
/** Datatype used for the density */
typedef typename itk::NumericTraits<typename InputImageType::PixelType>::RealType
RealType;
/** Evalulate the function at specified index */
RealType EvaluateAtIndex(const IndexType& index) const override;
/** Evaluate the function at non-integer positions */
RealType Evaluate(const PointType& point) const override
{
IndexType index;
this->ConvertPointToNearestIndex(point, index);
return this->EvaluateAtIndex(index);
}
RealType EvaluateAtContinuousIndex(
const ContinuousIndexType& cindex) const override
{
IndexType index;
this->ConvertContinuousIndexToNearestIndex(cindex, index);
return this->EvaluateAtIndex(index);
}
/** Get/Set the radius of the neighborhood over which the
statistics are evaluated */
itkSetMacro(NeighborhoodRadius, RadiusType);
itkGetConstReferenceMacro(NeighborhoodRadius, RadiusType);
void SetNeighborhoodRadius(unsigned int rad)
{
m_NeighborhoodRadius.Fill(rad);
this->Modified();
}
protected:
BinaryImageDensityFunction();
~BinaryImageDensityFunction() override{}
void PrintSelf(std::ostream& os, itk::Indent indent) const override;
private:
BinaryImageDensityFunction(const Self &); //purposely not implemented
void operator =(const Self&); //purposely not implemented
RadiusType m_NeighborhoodRadius;
};
} // end namespace otb
#ifndef OTB_MANUAL_INSTANTIATION
# include "otbBinaryImageDensityFunction.txx"
#endif
#endif
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