seriesstats.hh

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/* -*- mia-c++  -*-
 *
 * This file is part of MIA - a toolbox for medical image analysis 
 * Copyright (c) Leipzig, Madrid 1999-2017 Gert Wollny
 *
 * MIA is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with MIA; if not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef mia_2d_seriesstats_hh
#define mia_2d_seriesstats_hh


#include <mia/core/filter.hh>

NS_MIA_BEGIN

struct SIntensityStats {
        double sum; 
        double sumsq; 
        double mean; 
        double variation; 
        double min; 
        double max; 
        size_t n; 
}; 

class EXPORT_CORE FIntensityStatsAccumulator : public TFilter<void> {
public: 
        FIntensityStatsAccumulator(); 
        
        template <typename Container> 
        void operator () ( const Container& data); 
        

        const SIntensityStats& get_result() const; 
private: 
        mutable SIntensityStats m_stats; 
        mutable bool m_stats_valid; 
};  

template <typename Container> 
void FIntensityStatsAccumulator::operator () ( const Container& data)
{
        m_stats_valid = false; 
        m_stats.n += data.size(); 
        for (auto i = data.begin(); i != data.end(); ++i) {
                m_stats.sum += *i; 
                m_stats.sumsq += *i * *i; 
                if (m_stats.min > *i) 
                        m_stats.min = *i; 
                if (m_stats.max < *i) 
                        m_stats.max = *i; 
        }
}

NS_MIA_END

#endif