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/*
* Copyright (C) 2005-2020 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 otbReduceSpectralResponse_h
#define otbReduceSpectralResponse_h
#include "itkDataObject.h"
#include <itkObjectFactory.h>
#include <vector>
#include <utility>
#include <limits>
namespace otb
{
/** \class ReduceSpectralResponse
* \brief This class computes the reduced spectral response of each band of a sensor
*
* It takes the spectral response of an object and the relative
* spectral response of a satellite (one response per band) to
* compute the satellite spectral bands.
*
* There are 2 operating modes:
* - radiance mode (default): integrates the spectral response over each band
* - reflectance mode (needs to call SetReflectanceMode(true)): takes into account
* the solar irradiance in the integration
*
* The two templates indicate:
* - the SpectralResponse input
* - the relative spectral response (RSR) of a sensor
*
* The computation assumes that the RSR of the sensor has a
* wavelength resolution similar or better than the spectral
* response to be reduced. If this is not the case, it is wise to
* oversample it (by linear interpolation, for instance).
*
* The method CalculateResponse must be called.
*
* \sa itk::DataObject
* \sa SpectralResponse
* \sa SatelliteRSR
*
*
* \ingroup OTBSimulation
*/
template <class TSpectralResponse, class TRSR>
class ReduceSpectralResponse : public itk::DataObject
{
public:
/** Standard class typedefs */
typedef ReduceSpectralResponse Self;
typedef itk::DataObject Superclass;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer<const Self> ConstPointer;
/** Template parameters typedef */
typedef TSpectralResponse InputSpectralResponseType;
typedef TRSR InputRSRType;
typedef typename InputSpectralResponseType::PairType PairType;
typedef typename InputRSRType::Pointer InputRSRPointerType;
typedef typename InputSpectralResponseType::Pointer InputSpectralResponsePointerType;
typedef typename InputRSRType::PrecisionType PrecisionType;
typedef typename InputRSRType::ValuePrecisionType ValuePrecisionType;
typedef typename InputSpectralResponseType::VectorPairType VectorPairType;
// TODO need a specific class for the integration of stectral responses (now it is in the functor)
typedef typename InputRSRType::RSRVectorType RSRVectorType;
typedef typename std::vector<ValuePrecisionType> ReduceSpectralResponseVectorType;
/** Standard macros */
itkNewMacro(Self);
;
itkTypeMacro(ReduceSpectralResponse, DataObject);
;
itkGetConstObjectMacro(InputSatRSR, InputRSRType);
;
itkSetObjectMacro(InputSatRSR, InputRSRType);
;
itkGetConstObjectMacro(InputSpectralResponse, InputSpectralResponseType);
;
itkSetObjectMacro(InputSpectralResponse, InputSpectralResponseType);
;
/** The GetReduceResponse method gives the output. The first value in the pair is the central wavelength of the band (see SpectralResponse). */
itkGetObjectMacro(ReduceResponse, InputSpectralResponseType);
;
itkSetMacro(ReflectanceMode, bool);
itkGetConstMacro(ReflectanceMode, bool);
/** Clear the vector data */
virtual bool Clear();
/** PrintSelf method */
void PrintSelf(std::ostream& os, itk::Indent indent) const override;
/**
* \param PrecisionType
* \return The integrated value of the RSR for the input spectral response.
*/
inline ValuePrecisionType operator()(const unsigned int numBand);
/** Calculate the vector response for each band of the sensor*/
void CalculateResponse();
/** Create and load Spectral response and satellite RSR from files*/
void LoadInputsFromFiles(const std::string& spectralResponseFile, const std::string& RSRFile, const unsigned int nbRSRBands,
ValuePrecisionType coefNormSpectre = 1.0, ValuePrecisionType coefNormRSR = 1.0);
protected:
/** Constructor */
ReduceSpectralResponse();
/** Constructor from a ASCII file */
// ReduceSpectralResponse( const std::string & filename );
/** Destructor */
~ReduceSpectralResponse() override{};
/** PrintSelf method */
// void PrintSelf(std::ostream& os, itk::Indent indent) const;
/** Input relative spectral sensor model of response */
InputRSRPointerType m_InputSatRSR;
/** Input spectral response (usually from a library) */
InputSpectralResponsePointerType m_InputSpectralResponse;
private:
ReduceSpectralResponse(const Self&) = delete;
void operator=(const Self&) = delete;
/** the computed response */
InputSpectralResponsePointerType m_ReduceResponse;
/** Choose between reflectance or radiance mode */
bool m_ReflectanceMode;
};
} // end namespace otb
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbReduceSpectralResponse.hxx"
#endif
#endif
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