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/*
* Copyright (C) 2005-2020 Centre National d'Etudes Spatiales (CNES)
* Copyright (C) 2007-2012 Institut Mines Telecom / Telecom Bretagne
*
* 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 otbEuclideanDistanceMetricWithMissingValue_h
#define otbEuclideanDistanceMetricWithMissingValue_h
#include "otbEuclideanDistanceMetricWithMissingValuePow2.h"
namespace otb
{
namespace Statistics
{
/** \class EuclideanDistanceMetricWithMissingValue
* \brief Euclidean distance function facing missing value.
*
* This class is derived from EuclideanDistanceMetricWithMissingValuePow2 class that handle the missing value
* functonnalities. Here, the square root is included in the evaluation...
*
* The class can be templated over any container that holds data elements, as
* for template of EuclideanDistanceMetric.
*
* The only restriction is that elements have to support NaN values.
*
* \sa EuclideanDistanceMetric
* \sa EuclideanDistanceMetricWithMissingValuePow2
*
* \ingroup OTBImageManipulation
*/
template <class TVector>
class ITK_EXPORT EuclideanDistanceMetricWithMissingValue : public otb::Statistics::EuclideanDistanceMetricWithMissingValuePow2<TVector>
{
public:
/** Standard "Self" typedef. */
typedef EuclideanDistanceMetricWithMissingValue Self;
typedef otb::Statistics::EuclideanDistanceMetricWithMissingValuePow2<TVector> Superclass;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer<const Self> ConstPointer;
typedef typename Superclass::MeasurementVectorSizeType MeasurementVectorSizeType;
/** Run-time type information (and related methods). */
itkTypeMacro(EuclideanDistanceMetricWithMissingValue, EuclideanDistanceMetricWithMissingValuePow2);
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Type of the component of a vector */
typedef typename TVector::ValueType ValueType;
/** Gets the distance between the origin and x */
double Evaluate(const TVector& x) const override
{
return ::std::sqrt(Superclass::Evaluate(x));
}
/** Gets the distance between x1 and x2 */
double Evaluate(const TVector& x1, const TVector& x2) const override
{
return ::std::sqrt(Superclass::Evaluate(x1, x2));
}
/** Gets the cooridnate distance between a and b. NOTE: a and b
* should be type of component */
double Evaluate(const ValueType& a, const ValueType& b) const
{
return ::std::sqrt(Superclass::Evaluate(a, b));
}
/** Returns true if the distance between x and the origin is less
* than radius */
bool IsWithinRange(const TVector& x, const double radius) const
{
return Superclass::IsWithinRange(x, radius);
}
protected:
EuclideanDistanceMetricWithMissingValue()
{
}
~EuclideanDistanceMetricWithMissingValue() override
{
}
}; // end of class
} // end namespace statistics
} // end namespace otb
#endif
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