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/***************************************************************************\
 * Copyright (C) by University Paris-Est - MISS team
 * ConvolutionAverageOperator.hpp created in 10 2008.
 * Mail : biri@univ-mlv.fr
 *
 * This file is part of the OpenKraken-image.
 *
 * The OpenKraken-image is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * The OpenKraken-image is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.      If not, see <http://www.gnu.org/licenses/>.
 *
\***************************************************************************/

/*
 * Anti-doublon
 */
#ifndef __OPENKN_IMAGE__CONVOLUTIONAVERAGEOPERATOR_HPP__
#define __OPENKN_IMAGE__CONVOLUTIONAVERAGEOPERATOR_HPP__


/*
 * External Includes
 */


/*
 * Internal Includes
 */
#include "ImageException.hpp"
#include "ConvolutionOperator.hpp"

/*
 * Namespace
 */
namespace kn{
                /*
                 * Class definition
                 */
                class ConvolutionAverageOperator : public ConvolutionOperator {
                public:
                        /*
                         * Constructor & destructors
                         */
                        inline ConvolutionAverageOperator(){
                                sum = 0.0;
                                kernelSum = 0.0;
                        }

                        inline ConvolutionAverageOperator(const ConvolutionAverageOperator& e) : ConvolutionOperator(e){
                                sum = e.sum;
                                kernelSum = e.kernelSum;
                        }
                        inline ~ConvolutionAverageOperator(){}

                protected:
                        double sum;                                     
                        double kernelSum;               



                public:
                        inline void initialize(){
                                sum = 0.0;
                                kernelSum = 0.0;
                        }
                        
                        inline double getResult() {
                                if(kernelSum == 0)
                                        throw ImageException("kernel sum null");
                                return sum/kernelSum;
                        }

                        inline void operator()(double kernelValue, double imageValue){
                                sum+=kernelValue*imageValue;
                                kernelSum+=kernelValue;
                        }
                
                        inline ConvolutionAverageOperator* clone() const{
                                return new ConvolutionAverageOperator(*this);
                        }
                };

                /*
                 * End of Namespace
                 */
}

/*
 * End of Anti-doublon
 */
#endif

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