Preprocessor.h

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/*
 * This program 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.
 *
 * Written (W) 1999-2009 Soeren Sonnenburg
 * Written (W) 1999-2008 Gunnar Raetsch
 * Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society
 */

#ifndef PREPROCESSOR_H_
#define PREPROCESSOR_H_

#include <shogun/lib/config.h>

#include <shogun/lib/common.h>
#include <shogun/base/SGObject.h>
#include <shogun/features/FeatureTypes.h>
#include <shogun/features/Features.h>

namespace shogun
{

class CFeatures;

enum EPreprocessorType
{
    P_UNKNOWN=0,
    P_NORMONE=10,
    P_LOGPLUSONE=20,
    P_SORTWORDSTRING=30,
    P_SORTULONGSTRING=40,
    P_SORTWORD=50,
    P_PRUNEVARSUBMEAN=60,
    P_DECOMPRESSSTRING=70,
    P_DECOMPRESSCHARSTRING=80,
    P_DECOMPRESSBYTESTRING=90,
    P_DECOMPRESSWORDSTRING=100,
    P_DECOMPRESSULONGSTRING=110,
    P_RANDOMFOURIERGAUSS=120,
    P_PCA=130,
    P_KERNELPCA=140,
    P_NORMDERIVATIVELEM3=150,
    P_DIMENSIONREDUCTIONPREPROCESSOR=160,
    P_SUMONE=170,
    P_HOMOGENEOUSKERNELMAP = 180,
    P_PNORM = 190,
    P_RESCALEFEATURES = 200,
    P_FISHERLDA = 210,
    P_BAHSIC = 220
};

class CPreprocessor : public CSGObject
{
public:
    CPreprocessor() : CSGObject()
    {
    };

    virtual ~CPreprocessor()
    {
    }

    virtual bool init(CFeatures* features)=0;

    virtual CFeatures* apply(CFeatures* features)=0;

    virtual void cleanup()=0;

    virtual EFeatureType get_feature_type()=0;

    virtual EFeatureClass get_feature_class()=0;

    virtual EPreprocessorType get_type() const=0;
};
}
#endif // PREPROCESSOR_H_