NICE_SemSeg/semseg/SemSegContextTree.cpp

#include "SemSegContextTree.h"
#include "vislearning/baselib/Globals.h"
#include "vislearning/baselib/ProgressBar.h"
#include "core/basics/StringTools.h"

#include "vislearning/cbaselib/CachedExample.h"
#include "vislearning/cbaselib/PascalResults.h"
#include "vislearning/baselib/ColorSpace.h"
#include "objrec/segmentation/RSMeanShift.h"
#include "objrec/segmentation/RSGraphBased.h"
#include "core/basics/numerictools.h"

#include "core/basics/Timer.h"

#include <omp.h>
#include <iostream>

#define BOUND(x,min,max) (((x)<(min))?(min):((x)>(max)?(max):(x)))
#undef LOCALFEATS
//#define LOCALFEATS

using namespace OBJREC;

using namespace std;

using namespace NICE;



class MCImageAccess: public ValueAccess
{

public:
  virtual double getVal( const Features &feats, const int &x, const int &y, const int &channel )
  {
    return feats.feats->get( x, y, channel );
  }

  virtual string writeInfos()
  {
    return "raw";
  }
};

class ClassificationResultAcess: public ValueAccess
{

public:
  virtual double getVal( const Features &feats, const int &x, const int &y, const int &channel )
  {
    return ( *feats.tree )[feats.cfeats->get( x,y,feats.cTree )].dist[channel];
  }

  virtual string writeInfos()
  {
    return "context";
  }
};

class Minus: public Operation
{

public:
  virtual double getVal( const Features &feats, const int &x, const int &y )
  {
    int xsize, ysize;
    getXY( feats, xsize, ysize );
    double v1 = values->getVal( feats, BOUND( x + x1, 0, xsize - 1 ), BOUND( y + y1, 0, ysize - 1 ), channel1 );
    double v2 = values->getVal( feats, BOUND( x + x2, 0, xsize - 1 ), BOUND( y + y2, 0, ysize - 1 ), channel2 );
    return v1 -v2;
  }

  virtual Operation* clone()
  {
    return new Minus();
  }

  virtual string writeInfos()
  {
    string out = "Minus";

    if ( values != NULL )
      out += values->writeInfos();

    return out;
  }

  virtual OperationTypes getOps()
  {
    return MINUS;
  }
};

class MinusAbs: public Operation
{

public:
  virtual double getVal( const Features &feats, const int &x, const int &y )
  {
    int xsize, ysize;
    getXY( feats, xsize, ysize );
    double v1 = values->getVal( feats, BOUND( x + x1, 0, xsize - 1 ), BOUND( y + y1, 0, ysize - 1 ), channel1 );
    double v2 = values->getVal( feats, BOUND( x + x2, 0, xsize - 1 ), BOUND( y + y2, 0, ysize - 1 ), channel2 );
    return abs( v1 -v2 );
  }

  virtual Operation* clone()
  {
    return new MinusAbs();
  };

  virtual string writeInfos()
  {
    string out = "MinusAbs";

    if ( values != NULL )
      out += values->writeInfos();

    return out;
  }

  virtual OperationTypes getOps()
  {
    return MINUSABS;
  }
};

class Addition: public Operation
{

public:
  virtual double getVal( const Features &feats, const int &x, const int &y )
  {
    int xsize, ysize;
    getXY( feats, xsize, ysize );
    double v1 = values->getVal( feats, BOUND( x + x1, 0, xsize - 1 ), BOUND( y + y1, 0, ysize - 1 ), channel1 );
    double v2 = values->getVal( feats, BOUND( x + x2, 0, xsize - 1 ), BOUND( y + y2, 0, ysize - 1 ), channel2 );
    return v1 + v2;
  }

  virtual Operation* clone()
  {
    return new Addition();
  }

  virtual string writeInfos()
  {
    string out = "Addition";

    if ( values != NULL )
      out += values->writeInfos();

    return out;
  }

  virtual OperationTypes getOps()
  {
    return ADDITION;
  }
};

class Only1: public Operation
{

public:
  virtual double getVal( const Features &feats, const int &x, const int &y )
  {
    int xsize, ysize;
    getXY( feats, xsize, ysize );
    double v1 = values->getVal( feats, BOUND( x + x1, 0, xsize - 1 ), BOUND( y + y1, 0, ysize - 1 ), channel1 );
    return v1;
  }

  virtual Operation* clone()
  {
    return new Only1();
  }

  virtual string writeInfos()
  {
    string out = "Only1";

    if ( values != NULL )
      out += values->writeInfos();

    return out;
  }

  virtual OperationTypes getOps()
  {
    return ONLY1;
  }
};

class RelativeXPosition: public Operation
{

public:
  virtual double getVal( const Features &feats, const int &x, const int &y )
  {
    int xsize, ysize;
    getXY( feats, xsize, ysize );
    return ( double )x / ( double )xsize;
  }

  virtual Operation* clone()
  {
    return new RelativeXPosition();
  }

  virtual string writeInfos()
  {
    return "RelativeXPosition";
  }

  virtual OperationTypes getOps()
  {
    return RELATIVEXPOSITION;
  }
};

class RelativeYPosition: public Operation
{

public:
  virtual double getVal( const Features &feats, const int &x, const int &y )
  {
    int xsize, ysize;
    getXY( feats, xsize, ysize );
    return ( double )x / ( double )xsize;
  }

  virtual Operation* clone()
  {
    return new RelativeYPosition();
  }

  virtual string writeInfos()
  {
    return "RelativeYPosition";
  }

  virtual OperationTypes getOps()
  {
    return RELATIVEYPOSITION;
  }
};

// uses mean of classification in window given by (x1,y1) (x2,y2)

class IntegralOps: public Operation
{

public:
  virtual void set( int _x1, int _y1, int _x2, int _y2, int _channel1, int _channel2, ValueAccess *_values )
  {
    x1 = min( _x1, _x2 );
    y1 = min( _y1, _y2 );
    x2 = max( _x1, _x2 );
    y2 = max( _y1, _y2 );
    channel1 = _channel1;
    channel2 = _channel2;
    values = _values;
  }

  virtual double getVal( const Features &feats, const int &x, const int &y )
  {
    int xsize, ysize;
    getXY( feats, xsize, ysize );
    return computeMean( *feats.integralImg, BOUND( x + x1, 0, xsize - 1 ), BOUND( y + y1, 0, ysize - 1 ), BOUND( x + x2, 0, xsize - 1 ), BOUND( y + y2, 0, ysize - 1 ), channel1 );
  }

  inline double computeMean( const NICE::MultiChannelImageT<double> &intImg, const int &uLx, const int &uLy, const int &lRx, const int &lRy, const int &chan )
  {
    double val1 = intImg.get( uLx, uLy, chan );
    double val2 = intImg.get( lRx, uLy, chan );
    double val3 = intImg.get( uLx, lRy, chan );
    double val4 = intImg.get( lRx, lRy, chan );
    double area = ( lRx - uLx ) * ( lRy - uLy );

    if ( area == 0 )
      return 0.0;

    return ( val1 + val4 - val2 - val3 ) / area;
  }

  virtual Operation* clone()
  {
    return new IntegralOps();
  }

  virtual string writeInfos()
  {
    return "IntegralOps";
  }

  virtual OperationTypes getOps()
  {
    return INTEGRAL;
  }
};

//like a global bag of words to model the current appearance of classes in an image without local context

class GlobalFeats: public IntegralOps
{

public:
  virtual double getVal( const Features &feats, const int &x, const int &y )
  {
    int xsize, ysize;
    getXY( feats, xsize, ysize );
    return computeMean( *feats.integralImg, 0, 0, xsize - 1, ysize - 1, channel1 );
  }

  virtual Operation* clone()
  {
    return new GlobalFeats();
  }

  virtual string writeInfos()
  {
    return "GlobalFeats";
  }

  virtual OperationTypes getOps()
  {
    return GLOBALFEATS;
  }
};

//uses mean of Integral image given by x1, y1 with current pixel as center

class IntegralCenteredOps: public IntegralOps
{

public:
  virtual void set( int _x1, int _y1, int _x2, int _y2, int _channel1, int _channel2, ValueAccess *_values )
  {
    x1 = abs( _x1 );
    y1 = abs( _y1 );
    x2 = abs( _x2 );
    y2 = abs( _y2 );
    channel1 = _channel1;
    channel2 = _channel2;
    values = _values;
  }

  virtual double getVal( const Features &feats, const int &x, const int &y )
  {
    int xsize, ysize;
    getXY( feats, xsize, ysize );
    return computeMean( *feats.integralImg, BOUND( x - x1, 0, xsize - 1 ), BOUND( y - y1, 0, ysize - 1 ), BOUND( x + x1, 0, xsize - 1 ), BOUND( y + y1, 0, ysize - 1 ), channel1 );
  }

  virtual Operation* clone()
  {
    return new IntegralCenteredOps();
  }

  virtual string writeInfos()
  {
    return "IntegralCenteredOps";
  }

  virtual OperationTypes getOps()
  {
    return INTEGRALCENT;
  }
};

//uses different of mean of Integral image given by two windows, where (x1,y1) is the width and height of window1 and (x2,y2) of window 2

class BiIntegralCenteredOps: public IntegralCenteredOps
{

public:
  virtual void set( int _x1, int _y1, int _x2, int _y2, int _channel1, int _channel2, ValueAccess *_values )
  {
    x1 = min( abs( _x1 ), abs( _x2 ) );
    y1 = min( abs( _y1 ), abs( _y2 ) );
    x2 = max( abs( _x1 ), abs( _x2 ) );
    y2 = max( abs( _y1 ), abs( _y2 ) );
    channel1 = _channel1;
    channel2 = _channel2;
    values = _values;
  }

  virtual double getVal( const Features &feats, const int &x, const int &y )
  {
    int xsize, ysize;
    getXY( feats, xsize, ysize );
    return computeMean( *feats.integralImg, BOUND( x - x1, 0, xsize - 1 ), BOUND( y - y1, 0, ysize - 1 ), BOUND( x + x1, 0, xsize - 1 ), BOUND( y + y1, 0, ysize - 1 ), channel1 ) - computeMean( *feats.integralImg, BOUND( x - x2, 0, xsize - 1 ), BOUND( y - y2, 0, ysize - 1 ), BOUND( x + x2, 0, xsize - 1 ), BOUND( y + y2, 0, ysize - 1 ), channel1 );
  }

  virtual Operation* clone()
  {
    return new BiIntegralCenteredOps();
  }

  virtual string writeInfos()
  {
    return "BiIntegralCenteredOps";
  }

  virtual OperationTypes getOps()
  {
    return BIINTEGRALCENT;
  }
};

/** horizontal Haar features
 * ++
 * --
 */

class HaarHorizontal: public IntegralCenteredOps
{
  virtual double getVal( const Features &feats, const int &x, const int &y )
  {
    int xsize, ysize;
    getXY( feats, xsize, ysize );

    int tlx = BOUND( x - x1, 0, xsize - 1 );
    int tly = BOUND( y - y1, 0, ysize - 1 );
    int lrx = BOUND( x + x1, 0, xsize - 1 );
    int lry = BOUND( y + y1, 0, ysize - 1 );

    return computeMean( *feats.integralImg, tlx, tly, lrx, y, channel1 ) - computeMean( *feats.integralImg, tlx, y, lrx, lry, channel1 );
  }

  virtual Operation* clone()
  {
    return new HaarHorizontal();
  }

  virtual string writeInfos()
  {
    return "HaarHorizontal";
  }

  virtual OperationTypes getOps()
  {
    return HAARHORIZ;
  }
};

/** vertical Haar features
 * +-
 * +-
 */

class HaarVertical: public IntegralCenteredOps
{
  virtual double getVal( const Features &feats, const int &x, const int &y )
  {
    int xsize, ysize;
    getXY( feats, xsize, ysize );

    int tlx = BOUND( x - x1, 0, xsize - 1 );
    int tly = BOUND( y - y1, 0, ysize - 1 );
    int lrx = BOUND( x + x1, 0, xsize - 1 );
    int lry = BOUND( y + y1, 0, ysize - 1 );

    return computeMean( *feats.integralImg, tlx, tly, x, lry, channel1 ) - computeMean( *feats.integralImg, x, tly, lrx, lry, channel1 );
  }

  virtual Operation* clone()
  {
    return new HaarVertical();
  }

  virtual string writeInfos()
  {
    return "HaarVertical";
  }

  virtual OperationTypes getOps()
  {
    return HAARVERT;
  }
};

/** vertical Haar features
 * +-
 * -+
 */

class HaarDiag: public IntegralCenteredOps
{
  virtual double getVal( const Features &feats, const int &x, const int &y )
  {
    int xsize, ysize;
    getXY( feats, xsize, ysize );

    int tlx = BOUND( x - x1, 0, xsize - 1 );
    int tly = BOUND( y - y1, 0, ysize - 1 );
    int lrx = BOUND( x + x1, 0, xsize - 1 );
    int lry = BOUND( y + y1, 0, ysize - 1 );

    return computeMean( *feats.integralImg, tlx, tly, x, y, channel1 ) + computeMean( *feats.integralImg, x, y, lrx, lry, channel1 ) - computeMean( *feats.integralImg, tlx, y, x, lry, channel1 ) - computeMean( *feats.integralImg, x, tly, lrx, y, channel1 );
  }

  virtual Operation* clone()
  {
    return new HaarDiag();
  }

  virtual string writeInfos()
  {
    return "HaarDiag";
  }

  virtual OperationTypes getOps()
  {
    return HAARDIAG;
  }
};

/** horizontal Haar features
 * +++
 * ---
 * +++
 */

class Haar3Horiz: public BiIntegralCenteredOps
{
  virtual double getVal( const Features &feats, const int &x, const int &y )
  {
    int xsize, ysize;
    getXY( feats, xsize, ysize );

    int tlx = BOUND( x - x2, 0, xsize - 1 );
    int tly = BOUND( y - y2, 0, ysize - 1 );
    int mtly = BOUND( y - y1, 0, ysize - 1 );
    int mlry = BOUND( y + y1, 0, ysize - 1 );
    int lrx = BOUND( x + x2, 0, xsize - 1 );
    int lry = BOUND( y + y2, 0, ysize - 1 );

    return computeMean( *feats.integralImg, tlx, tly, lrx, mtly, channel1 ) - computeMean( *feats.integralImg, tlx, mtly, lrx, mlry, channel1 ) + computeMean( *feats.integralImg, tlx, mlry, lrx, lry, channel1 );
  }

  virtual Operation* clone()
  {
    return new Haar3Horiz();
  }

  virtual string writeInfos()
  {
    return "Haar3Horiz";
  }

  virtual OperationTypes getOps()
  {
    return HAAR3HORIZ;
  }
};

/** vertical Haar features
 * +-+
 * +-+
 * +-+
 */

class Haar3Vert: public BiIntegralCenteredOps
{
  virtual double getVal( const Features &feats, const int &x, const int &y )
  {
    int xsize, ysize;
    getXY( feats, xsize, ysize );

    int tlx = BOUND( x - x2, 0, xsize - 1 );
    int tly = BOUND( y - y2, 0, ysize - 1 );
    int mtlx = BOUND( x - x1, 0, xsize - 1 );
    int mlrx = BOUND( x + x1, 0, xsize - 1 );
    int lrx = BOUND( x + x2, 0, xsize - 1 );
    int lry = BOUND( y + y2, 0, ysize - 1 );

    return computeMean( *feats.integralImg, tlx, tly, mtlx, lry, channel1 ) - computeMean( *feats.integralImg, mtlx, tly, mlrx, lry, channel1 ) + computeMean( *feats.integralImg, mlrx, tly, lrx, lry, channel1 );
  }

  virtual Operation* clone()
  {
    return new Haar3Vert();
  }

  virtual string writeInfos()
  {
    return "Haar3Vert";
  }

  virtual OperationTypes getOps()
  {
    return HAAR3VERT;
  }
};

SemSegContextTree::SemSegContextTree( const Config *conf, const MultiDataset *md )
    : SemanticSegmentation( conf, &( md->getClassNames( "train" ) ) )
{
  this->conf = conf;
  string section = "SSContextTree";
  lfcw = new LFColorWeijer( conf );

  grid = conf->gI( section, "grid", 10 );

  maxSamples = conf->gI( section, "max_samples", 2000 );

  minFeats = conf->gI( section, "min_feats", 50 );

  maxDepth = conf->gI( section, "max_depth", 10 );

  windowSize = conf->gI( section, "window_size", 16 );

  featsPerSplit = conf->gI( section, "feats_per_split", 200 );

  useShannonEntropy = conf->gB( section, "use_shannon_entropy", true );

  nbTrees = conf->gI( section, "amount_trees", 1 );

  string segmentationtype = conf->gS( section, "segmentation_type", "meanshift" );

  useGaussian = conf->gB( section, "use_gaussian", true );

  if ( useGaussian )
    throw( "there something wrong with using gaussian! first fix it!" );

  pixelWiseLabeling = false;

  if ( segmentationtype == "meanshift" )
    segmentation = new RSMeanShift( conf );
  else if ( segmentationtype == "none" )
  {
    segmentation = NULL;
    pixelWiseLabeling = true;
  }
  else if ( segmentationtype == "felzenszwalb" )
    segmentation = new RSGraphBased( conf );
  else
    throw( "no valid segmenation_type\n please choose between none, meanshift and felzenszwalb\n" );

  ftypes = conf->gI( section, "features", 2 );;

  ops.push_back( new Minus() );
  ops.push_back( new MinusAbs() );
  ops.push_back( new Addition() );
  ops.push_back( new Only1() );
  ops.push_back( new RelativeXPosition() );
  ops.push_back( new RelativeYPosition() );

  cops.push_back( new BiIntegralCenteredOps() );
  cops.push_back( new IntegralCenteredOps() );
  cops.push_back( new IntegralOps() );
  cops.push_back( new HaarHorizontal() );
  cops.push_back( new HaarVertical() );
  cops.push_back( new HaarDiag() );
  cops.push_back( new Haar3Horiz() );
  cops.push_back( new Haar3Vert() );
  cops.push_back( new GlobalFeats() );

  opOverview = vector<int>( NBOPERATIONS, 0 );

  calcVal.push_back( new MCImageAccess() );
  calcVal.push_back( new ClassificationResultAcess() );

  classnames = md->getClassNames( "train" );

  ///////////////////////////////////
  // Train Segmentation Context Trees
  ///////////////////////////////////

  train( md );
}

SemSegContextTree::~SemSegContextTree()
{
}

double SemSegContextTree::getBestSplit( std::vector<NICE::MultiChannelImageT<double> > &feats, std::vector<NICE::MultiChannelImageT<int> > &currentfeats, std::vector<NICE::MultiChannelImageT<double> > &integralImgs, const std::vector<NICE::MatrixT<int> > &labels, int node, Operation *&splitop, double &splitval, const int &tree )
{
  int imgCount = 0, featdim = 0;

  try
  {
    imgCount = ( int )feats.size();
    featdim = feats[0].channels();
  }
  catch ( Exception )
  {
    cerr << "no features computed?" << endl;
  }

  double bestig = -numeric_limits< double >::max();

  splitop = NULL;
  splitval = -1.0;

  set<vector<int> >selFeats;
  map<int, int> e;
  int featcounter = forest[tree][node].featcounter;
  
  if ( featcounter < minFeats )
  {
    //cout << "only " << featcounter << " feats in current node -> it's a leaf" << endl;
    return 0.0;
  }

  vector<double> fraction( a.size(), 0.0 );

  for ( uint i = 0; i < fraction.size(); i++ )
  {
    if ( forbidden_classes.find( labelmapback[i] ) != forbidden_classes.end() )
      fraction[i] = 0;
    else
      fraction[i] = (( double )maxSamples ) / (( double )featcounter * a[i] * a.size() );

    //cout << "fraction["<<i<<"]: "<< fraction[i] << " a[" << i << "]: " << a[i] << endl;
  }

  featcounter = 0;

  for ( int iCounter = 0; iCounter < imgCount; iCounter++ )
  {
    int xsize = ( int )currentfeats[iCounter].width();
    int ysize = ( int )currentfeats[iCounter].height();

    for ( int x = 0; x < xsize; x++ )
    {
      for ( int y = 0; y < ysize; y++ )
      {
        if ( currentfeats[iCounter].get( x, y, tree ) == node )
        {
          int cn = labels[iCounter]( x, y );
          double randD = ( double )rand() / ( double )RAND_MAX;

          if ( randD < fraction[labelmap[cn]] )
          {
            vector<int> tmp( 3, 0 );
            tmp[0] = iCounter;
            tmp[1] = x;
            tmp[2] = y;
            featcounter++;
            selFeats.insert( tmp );
            e[cn]++;
          }
        }
      }
    }
  }

  //cout << "size: " << selFeats.size() << endl;
  //getchar();

  map<int, int>::iterator mapit;

  double globent = 0.0;

  for ( mapit = e.begin() ; mapit != e.end(); mapit++ )
  {
    //cout << "class: " << mapit->first << ": " << mapit->second << endl;
    double p = ( double )( *mapit ).second / ( double )featcounter;
    globent += p * log2( p );
  }

  globent = -globent;

  if ( globent < 0.5 )
  {
    //cout << "globent to small: " << globent << endl;
    return 0.0;
  }

  int classes = ( int )forest[tree][0].dist.size();

  featsel.clear();

  for ( int i = 0; i < featsPerSplit; i++ )
  {
    int x1, x2, y1, y2;
    int ft = ( int )(( double )rand() / ( double )RAND_MAX * ( double )ftypes );

    int tmpws = windowSize;

    if ( integralImgs[0].width() == 0 )
      ft = 0;

    if ( ft > 0 )
    {
      tmpws *= 4;
    }

    if ( useGaussian )
    {
      double sigma = ( double )tmpws / 2.0;
      x1 = randGaussDouble( sigma ) * ( double )tmpws;
      x2 = randGaussDouble( sigma ) * ( double )tmpws;
      y1 = randGaussDouble( sigma ) * ( double )tmpws;
      y2 = randGaussDouble( sigma ) * ( double )tmpws;
    }
    else
    {
      x1 = ( int )(( double )rand() / ( double )RAND_MAX * ( double )tmpws ) - tmpws / 2;
      x2 = ( int )(( double )rand() / ( double )RAND_MAX * ( double )tmpws ) - tmpws / 2;
      y1 = ( int )(( double )rand() / ( double )RAND_MAX * ( double )tmpws ) - tmpws / 2;
      y2 = ( int )(( double )rand() / ( double )RAND_MAX * ( double )tmpws ) - tmpws / 2;
    }

    if ( ft == 0 )
    {
      int f1 = ( int )(( double )rand() / ( double )RAND_MAX * ( double )featdim );
      int f2 = ( int )(( double )rand() / ( double )RAND_MAX * ( double )featdim );
      int o = ( int )(( double )rand() / ( double )RAND_MAX * ( double )ops.size() );
      Operation *op = ops[o]->clone();
      op->set( x1, y1, x2, y2, f1, f2, calcVal[ft] );
      featsel.push_back( op );
    }
    else if ( ft == 1 )
    {

      int opssize = ( int )ops.size();
      //opssize = 0;
      int o = ( int )(( double )rand() / ( double )RAND_MAX * ((( double )cops.size() ) + ( double )opssize ) );

      Operation *op;

      if ( o < opssize )
      {
        int chans = ( int )forest[0][0].dist.size();
        int f1 = ( int )(( double )rand() / ( double )RAND_MAX * ( double )chans );
        int f2 = ( int )(( double )rand() / ( double )RAND_MAX * ( double )chans );
        op = ops[o]->clone();
        op->set( x1, y1, x2, y2, f1, f2, calcVal[ft] );
      }
      else
      {
        int chans = integralImgs[0].channels();
        int f1 = ( int )(( double )rand() / ( double )RAND_MAX * ( double )chans );
        int f2 = ( int )(( double )rand() / ( double )RAND_MAX * ( double )chans );
        o -= opssize;
        op = cops[o]->clone();
        op->set( x1, y1, x2, y2, f1, f2, calcVal[ft] );
      }

      featsel.push_back( op );
    }
  }
  
#pragma omp parallel for private(mapit)
  for ( int f = 0; f < featsPerSplit; f++ )
  {
    double l_bestig = -numeric_limits< double >::max();
    double l_splitval = -1.0;
    set<vector<int> >::iterator it;
    vector<double> vals;

    for ( it = selFeats.begin() ; it != selFeats.end(); it++ )
    {
      Features feat;
      feat.feats = &feats[( *it )[0]];
      feat.cfeats = &currentfeats[( *it )[0]];
      feat.cTree = tree;
      feat.tree = &forest[tree];
      feat.integralImg = &integralImgs[( *it )[0]];
      vals.push_back( featsel[f]->getVal( feat, ( *it )[1], ( *it )[2] ) );
    }

    int counter = 0;

    for ( it = selFeats.begin() ; it != selFeats.end(); it++ , counter++ )
    {
      set<vector<int> >::iterator it2;
      double val = vals[counter];

      map<int, int> eL, eR;
      int counterL = 0, counterR = 0;
      int counter2 = 0;

      for ( it2 = selFeats.begin() ; it2 != selFeats.end(); it2++, counter2++ )
      {
        int cn = labels[( *it2 )[0]](( *it2 )[1], ( *it2 )[2] );
        //cout << "vals[counter2] " << vals[counter2] << " val: " <<  val << endl;

        if ( vals[counter2] < val )
        {
          //left entropie:
          eL[cn] = eL[cn] + 1;
          counterL++;
        }
        else
        {
          //right entropie:
          eR[cn] = eR[cn] + 1;
          counterR++;
        }
      }

      double leftent = 0.0;

      for ( mapit = eL.begin() ; mapit != eL.end(); mapit++ )
      {
        double p = ( double )( *mapit ).second / ( double )counterL;
        leftent -= p * log2( p );
      }

      double rightent = 0.0;

      for ( mapit = eR.begin() ; mapit != eR.end(); mapit++ )
      {
        double p = ( double )( *mapit ).second / ( double )counterR;
        rightent -= p * log2( p );
      }

      //cout << "rightent: " << rightent << " leftent: " << leftent << endl;

      double pl = ( double )counterL / ( double )( counterL + counterR );

      double ig = globent - ( 1.0 - pl ) * rightent - pl * leftent;

      //double ig = globent - rightent - leftent;

      if ( useShannonEntropy )
      {
        double esplit = - ( pl * log( pl ) + ( 1 - pl ) * log( 1 - pl ) );
        ig = 2 * ig / ( globent + esplit );
      }

      if ( ig > l_bestig )
      {
        l_bestig = ig;
        l_splitval = val;
      }
    }

#pragma omp critical
    {
      //cout << "globent: " << globent <<  " bestig " << bestig << " splitfeat: " << splitfeat << " splitval: " << splitval << endl;
      //cout << "globent: " << globent <<  " l_bestig " << l_bestig << " f: " << p << " l_splitval: " << l_splitval << endl;
      //cout << "p: " << featsubset[f] << endl;

      if ( l_bestig > bestig )
      {
        bestig = l_bestig;
        splitop = featsel[f];
        splitval = l_splitval;
      }
    }
  }
  //getchar();
  //splitop->writeInfos();
  //cout<< "ig: " << bestig << endl;
  //FIXME: delete all features!
  /*for(int i = 0; i < featsPerSplit; i++)
  {
   if(featsel[i] != splitop)
    delete featsel[i];
  }*/
#ifdef debug
  cout << "globent: " << globent <<  " bestig " << bestig << " splitval: " << splitval << endl;

#endif
  return bestig;
}

inline double SemSegContextTree::getMeanProb( const int &x, const int &y, const int &channel, const MultiChannelImageT<int> &currentfeats )
{
  double val = 0.0;

  for ( int tree = 0; tree < nbTrees; tree++ )
  {
    val += forest[tree][currentfeats.get( x,y,tree )].dist[channel];
  }

  return val / ( double )nbTrees;
}

void SemSegContextTree::computeIntegralImage( const NICE::MultiChannelImageT<int> &currentfeats, const NICE::MultiChannelImageT<double> &lfeats, NICE::MultiChannelImageT<double> &integralImage )
{
  int xsize = currentfeats.width();
  int ysize = currentfeats.height();

  int channels = ( int )forest[0][0].dist.size();
#pragma omp parallel for
  for ( int c = 0; c < channels; c++ )
  {
    integralImage.set( 0, 0, getMeanProb( 0, 0, c, currentfeats ), c );

    //first column

    for ( int y = 1; y < ysize; y++ )
    {
      integralImage.set( 0, y, getMeanProb( 0, y, c, currentfeats ) + integralImage.get( 0, y, c ), c );
    }

    //first row
    for ( int x = 1; x < xsize; x++ )
    {
      integralImage.set( x, 0, getMeanProb( x, 0, c, currentfeats ) + integralImage.get( x, 0, c ), c );
    }

    //rest
    for ( int y = 1; y < ysize; y++ )
    {
      for ( int x = 1; x < xsize; x++ )
      {
        double val = getMeanProb( x, y, c, currentfeats ) + integralImage.get( x, y - 1, c ) + integralImage.get( x - 1, y, c ) - integralImage.get( x - 1, y - 1, c );
        integralImage.set( x, y, val, c );
      }
    }
  }

  int channels2 = ( int )lfeats.channels();

  xsize = lfeats.width();
  ysize = lfeats.height();

  if ( integralImage.get( xsize - 1, ysize - 1, channels ) == 0.0 )
  {
#pragma omp parallel for
    for ( int c1 = 0; c1 < channels2; c1++ )
    {
      int c = channels + c1;
      integralImage.set( 0, 0, lfeats.get( 0, 0, c1 ), c );

      //first column

      for ( int y = 1; y < ysize; y++ )
      {
        integralImage.set( 0, y, lfeats.get( 0, y, c1 ) + integralImage.get( 0, y, c ), c );
      }

      //first row
      for ( int x = 1; x < xsize; x++ )
      {
        integralImage.set( x, 0, lfeats.get( x, 0, c1 ) + integralImage.get( x, 0, c ), c );
      }

      //rest
      for ( int y = 1; y < ysize; y++ )
      {
        for ( int x = 1; x < xsize; x++ )
        {
          double val = lfeats.get( x, y, c1 ) + integralImage.get( x, y - 1, c ) + integralImage.get( x - 1, y, c ) - integralImage.get( x - 1, y - 1, c );
          integralImage.set( x, y, val, c );
        }
      }
    }
  }
}

void SemSegContextTree::train( const MultiDataset *md )
{
  const LabeledSet train = * ( *md )["train"];
  const LabeledSet *trainp = &train;

  ProgressBar pb( "compute feats" );
  pb.show();

  //TODO: Speichefresser!, lohnt sich sparse?
  vector<MultiChannelImageT<double> > allfeats;
  vector<MultiChannelImageT<int> > currentfeats;
  vector<MatrixT<int> > labels;

  std::string forbidden_classes_s = conf->gS( "analysis", "donttrain", "" );

  if ( forbidden_classes_s == "" )
  {
    forbidden_classes_s = conf->gS( "analysis", "forbidden_classes", "" );
  }

  classnames.getSelection( forbidden_classes_s, forbidden_classes );

  int imgcounter = 0;

  /*
  MultiChannelImageT<int> ttmp2(0,0,0);
  MultiChannelImageT<double> ttmp1(100,100,1);
  MultiChannelImageT<double> tint(100,100,1);
  ttmp1.setAll(1.0);
  tint.setAll(0.0);
  computeIntegralImage(ttmp2,ttmp1,tint);


  for(int i = 0; i < cops.size(); i++)
  {
   Features feats;
   feats.feats = &tint;
   feats.cfeats = &ttmp2;
   feats.cTree = 0;
   feats.tree = new vector<TreeNode>;
   feats.integralImg = &tint;
   cops[i]->set(-10, -6, 8, 9, 0, 0, new MCImageAccess());
   cout << "for: " << cops[i]->writeInfos() << endl;
   int y = 50;
   for(int x = 40; x < 44; x++)
   {
    cout << "x: " << x << " val: " << cops[i]->getVal(feats, x, y) << endl;
   }
  }

  getchar();*/

  int amountPixels = 0;
  
  LOOP_ALL_S( *trainp )
  {
    EACH_INFO( classno, info );

    NICE::ColorImage img;

    std::string currentFile = info.img();

    CachedExample *ce = new CachedExample( currentFile );

    const LocalizationResult *locResult = info.localization();

    if ( locResult->size() <= 0 )
    {
      fprintf( stderr, "WARNING: NO ground truth polygons found for %s !\n",
               currentFile.c_str() );
      continue;
    }

    fprintf( stderr, "SemSegCsurka: Collecting pixel examples from localization info: %s\n", currentFile.c_str() );

    int xsize, ysize;
    ce->getImageSize( xsize, ysize );
    amountPixels += xsize*ysize;

    MatrixT<int> tmpMat( xsize, ysize );

    currentfeats.push_back( MultiChannelImageT<int>( xsize, ysize, nbTrees ) );
    currentfeats[imgcounter].setAll( 0 );

    labels.push_back( tmpMat );

    try {
      img = ColorImage( currentFile );
    } catch ( Exception ) {
      cerr << "SemSeg: error opening image file <" << currentFile << ">" << endl;
      continue;
    }

    Globals::setCurrentImgFN( currentFile );

    //TODO: resize image?!
    MultiChannelImageT<double> feats;
    allfeats.push_back( feats );
#ifdef LOCALFEATS
    lfcw->getFeats( img, allfeats[imgcounter] );
#else
    allfeats[imgcounter].reInit( xsize, ysize, 3, true );

    for ( int x = 0; x < xsize; x++ )
    {
      for ( int y = 0; y < ysize; y++ )
      {
        for ( int r = 0; r < 3; r++ )
        {
          allfeats[imgcounter].set( x, y, img.getPixel( x, y, r ), r );
        }
      }
    }

    allfeats[imgcounter] = ColorSpace::rgbtolab(allfeats[imgcounter]);
#endif

    // getting groundtruth
    NICE::Image pixelLabels( xsize, ysize );

    pixelLabels.set( 0 );

    locResult->calcLabeledImage( pixelLabels, ( *classNames ).getBackgroundClass() );

    for ( int x = 0; x < xsize; x++ )
    {
      for ( int y = 0; y < ysize; y++ )
      {
        classno = pixelLabels.getPixel( x, y );
        labels[imgcounter]( x, y ) = classno;

        if ( forbidden_classes.find( classno ) != forbidden_classes.end() )
          continue;

        labelcounter[classno]++;

      }
    }

    imgcounter++;

    pb.update( trainp->count() );
    delete ce;
  }

  pb.hide();

  map<int, int>::iterator mapit;
  int classes = 0;

  for ( mapit = labelcounter.begin(); mapit != labelcounter.end(); mapit++ )
  {
    labelmap[mapit->first] = classes;

    labelmapback[classes] = mapit->first;
    classes++;
  }

  //balancing
  int featcounter = 0;

  a = vector<double>( classes, 0.0 );

  for ( int iCounter = 0; iCounter < imgcounter; iCounter++ )
  {
    int xsize = ( int )currentfeats[iCounter].width();
    int ysize = ( int )currentfeats[iCounter].height();

    for ( int x = 0; x < xsize; x++ )
    {
      for ( int y = 0; y < ysize; y++ )
      {
        featcounter++;
        int cn = labels[iCounter]( x, y );
        a[labelmap[cn]] ++;
      }
    }
  }

  for ( int i = 0; i < ( int )a.size(); i++ )
  {
    a[i] /= ( double )featcounter;
  }

#ifdef DEBUG
  for ( int i = 0; i < ( int )a.size(); i++ )
  {
    cout << "a[" << i << "]: " << a[i] << endl;
  }

  cout << "a.size: " << a.size() << endl;

#endif

  int depth = 0;

  for ( int t = 0; t < nbTrees; t++ )
  {
    vector<TreeNode> tree;
    tree.push_back( TreeNode() );
    tree[0].dist = vector<double>( classes, 0.0 );
    tree[0].depth = depth;
    tree[0].featcounter = amountPixels;
    forest.push_back( tree );
  }

  vector<int> startnode( nbTrees, 0 );

  bool allleaf = false;
  //int baseFeatSize = allfeats[0].size();

  vector<MultiChannelImageT<double> > integralImgs( imgcounter, MultiChannelImageT<double>() );

  while ( !allleaf && depth < maxDepth )
  {
    allleaf = true;
    vector<MultiChannelImageT<int> > lastfeats = currentfeats;

#if 1
    Timer timer;
    timer.start();
#endif

    for ( int tree = 0; tree < nbTrees; tree++ )
    {
      int t = ( int ) forest[tree].size();
      int s = startnode[tree];
      startnode[tree] = t;
      //TODO vielleicht parallel wenn nächste schleife trotzdem noch parallelsiert würde, die hat mehr gewicht
      //#pragma omp parallel for
#if 0
          timer.stop();
          cout << "time before tree: " << timer.getLast() << endl;
          timer.start();
#endif
      for ( int i = s; i < t; i++ )
      {
        if ( !forest[tree][i].isleaf && forest[tree][i].left < 0 )
        {
#if 0
                    timer.stop();
          cout << "time 1: " << timer.getLast() << endl;
          timer.start();
#endif
          Operation *splitfeat = NULL;
          double splitval;
          double bestig = getBestSplit( allfeats, lastfeats, integralImgs, labels, i, splitfeat, splitval, tree );
#if 0
          timer.stop();
          cout << "time 2: " << timer.getLast() << endl;
          timer.start();
#endif
          forest[tree][i].feat = splitfeat;
          forest[tree][i].decision = splitval;

          if ( splitfeat != NULL )
          {
            allleaf = false;
            int left = forest[tree].size();
            forest[tree].push_back( TreeNode() );
            forest[tree].push_back( TreeNode() );
            int right = left + 1;
            forest[tree][i].left = left;
            forest[tree][i].right = right;
            forest[tree][left].dist = vector<double>( classes, 0.0 );
            forest[tree][right].dist = vector<double>( classes, 0.0 );
            forest[tree][left].depth = depth + 1;
            forest[tree][right].depth = depth + 1;
            forest[tree][left].featcounter = 0;
            forest[tree][right].featcounter = 0;
#if 0
                      timer.stop();
          cout << "time 3: " << timer.getLast() << endl;
          timer.start();
#endif
#pragma omp parallel for
            for ( int iCounter = 0; iCounter < imgcounter; iCounter++ )
            {
              int xsize = currentfeats[iCounter].width();
              int ysize = currentfeats[iCounter].height();

              for ( int x = 0; x < xsize; x++ )
              {
                for ( int y = 0; y < ysize; y++ )
                {
                  if ( currentfeats[iCounter].get( x, y, tree ) == i )
                  {
                    Features feat;
                    feat.feats = &allfeats[iCounter];
                    feat.cfeats = &lastfeats[iCounter];
                    feat.cTree = tree;
                    feat.tree = &forest[tree];
                    feat.integralImg = &integralImgs[iCounter];
                    double val = splitfeat->getVal( feat, x, y );

                    if ( val < splitval )
                    {
                      currentfeats[iCounter].set( x, y, left, tree );
                      forest[tree][left].dist[labelmap[labels[iCounter]( x, y )]]++;
                      forest[tree][left].featcounter++;
                    }
                    else
                    {
                      currentfeats[iCounter].set( x, y, right, tree );
                      forest[tree][right].dist[labelmap[labels[iCounter]( x, y )]]++;
                    }
                  }
                }
              }
            }
#if 0
            timer.stop();
          cout << "time 4: " << timer.getLast() << endl;
          timer.start();
#endif
            forest[tree][right].featcounter = forest[tree][i].featcounter - forest[tree][left].featcounter;
            
            double lcounter = 0.0, rcounter = 0.0;

            for ( uint d = 0; d < forest[tree][left].dist.size(); d++ )
            {
              if ( forbidden_classes.find( labelmapback[d] ) != forbidden_classes.end() )
              {
                forest[tree][left].dist[d] = 0;
                forest[tree][right].dist[d] = 0;
              }
              else
              {
                forest[tree][left].dist[d] /= a[d];
                lcounter += forest[tree][left].dist[d];
                forest[tree][right].dist[d] /= a[d];
                rcounter += forest[tree][right].dist[d];
              }
            }
#if 0
            timer.stop();
          cout << "time 5: " << timer.getLast() << endl;
          timer.start();
#endif       
            if ( lcounter <= 0 || rcounter <= 0 )
            {
              cout << "lcounter : " << lcounter << " rcounter: " << rcounter << endl;
              cout << "splitval: " << splitval << " splittype: " << splitfeat->writeInfos() << endl;
              cout << "bestig: " << bestig << endl;

              for ( int iCounter = 0; iCounter < imgcounter; iCounter++ )
              {
                int xsize = currentfeats[iCounter].width();
                int ysize = currentfeats[iCounter].height();
                int counter = 0;

                for ( int x = 0; x < xsize; x++ )
                {
                  for ( int y = 0; y < ysize; y++ )
                  {
                    if ( lastfeats[iCounter].get( x, y, tree ) == i )
                    {
                      if ( ++counter > 30 )
                        break;

                      Features feat;

                      feat.feats = &allfeats[iCounter];

                      feat.cfeats = &lastfeats[iCounter];

                      feat.cTree = tree;

                      feat.tree = &forest[tree];

                      feat.integralImg = &integralImgs[iCounter];

                      double val = splitfeat->getVal( feat, x, y );

                      cout << "splitval: " << splitval << " val: " << val << endl;
                    }
                  }
                }
              }

              assert( lcounter > 0 && rcounter > 0 );
            }

            for ( uint d = 0; d < forest[tree][left].dist.size(); d++ )
            {
              forest[tree][left].dist[d] /= lcounter;
              forest[tree][right].dist[d] /= rcounter;
            }
          }
          else
          {
            forest[tree][i].isleaf = true;
          }
        }
      }
#if 0
           timer.stop();
          cout << "time after tree: " << timer.getLast() << endl;
          timer.start();
#endif
    }

    //TODO: features neu berechnen!

    //compute integral image
    int channels = classes + allfeats[0].channels();
#if 0
              timer.stop();
          cout << "time for part0: " << timer.getLast() << endl;
          timer.start();
#endif
    
    if ( integralImgs[0].width() == 0 )
    {
      for ( int i = 0; i < imgcounter; i++ )
      {
        int xsize = allfeats[i].width();
        int ysize = allfeats[i].height();
        integralImgs[i].reInit( xsize, ysize, channels );
        integralImgs[i].setAll( 0.0 );
      }
    }
#if 0
          timer.stop();
          cout << "time for part1: " << timer.getLast() << endl;
          timer.start();
#endif     


#pragma omp parallel for
    for ( int i = 0; i < imgcounter; i++ )
    {
      computeIntegralImage( currentfeats[i], allfeats[i], integralImgs[i] );
    }

#if 1
    timer.stop();

    cout << "time for depth " << depth << ": " << timer.getLast() << endl;

#endif
    depth++;

#ifdef DEBUG
    cout << "depth: " << depth << endl;
#endif
  }

#ifdef DEBUG
  for ( int tree = 0; tree < nbTrees; tree++ )
  {
    int t = ( int ) forest[tree].size();

    for ( int i = 0; i < t; i++ )
    {
      printf( "tree[%i]: left: %i, right: %i", i, forest[tree][i].left, forest[tree][i].right );

      if ( !forest[tree][i].isleaf && forest[tree][i].left != -1 )
      {
        cout <<  ", feat: " << forest[tree][i].feat->writeInfos() << " ";
        opOverview[forest[tree][i].feat->getOps()]++;
      }

      for ( int d = 0; d < ( int )forest[tree][i].dist.size(); d++ )
      {
        cout << " " << forest[tree][i].dist[d];
      }

      cout << endl;
    }
  }

  for ( uint c = 0; c < ops.size(); c++ )
  {
    cout << ops[c]->writeInfos() << ": " << opOverview[ops[c]->getOps()] << endl;
  }

  for ( uint c = 0; c < cops.size(); c++ )
  {
    cout << cops[c]->writeInfos() << ": " << opOverview[cops[c]->getOps()] << endl;
  }

#endif
}

void SemSegContextTree::semanticseg( CachedExample *ce, NICE::Image & segresult, NICE::MultiChannelImageT<double> & probabilities )
{
  int xsize;
  int ysize;
  ce->getImageSize( xsize, ysize );

  int numClasses = classNames->numClasses();

  fprintf( stderr, "ContextTree classification !\n" );

  probabilities.reInit( xsize, ysize, numClasses, true );
  probabilities.setAll( 0 );

  NICE::ColorImage img;

  std::string currentFile = Globals::getCurrentImgFN();

  try {
    img = ColorImage( currentFile );
  } catch ( Exception ) {
    cerr << "SemSeg: error opening image file <" << currentFile << ">" << endl;
    return;
  }

  //TODO: resize image?!

  MultiChannelImageT<double> feats;

#ifdef LOCALFEATS
  lfcw->getFeats( img, feats );

#else
  feats.reInit( xsize, ysize, 3, true );

  for ( int x = 0; x < xsize; x++ )
  {
    for ( int y = 0; y < ysize; y++ )
    {
      for ( int r = 0; r < 3; r++ )
      {
        feats.set( x, y, img.getPixel( x, y, r ), r );
      }
    }
  }
  
  feats = ColorSpace::rgbtolab(feats);
#endif

  bool allleaf = false;

  MultiChannelImageT<double> integralImg;

  MultiChannelImageT<int> currentfeats( xsize, ysize, nbTrees );

  currentfeats.setAll( 0 );

  int depth = 0;

  while ( !allleaf )
  {
    allleaf = true;
    //TODO vielleicht parallel wenn nächste schleife auch noch parallelsiert würde, die hat mehr gewicht
    //#pragma omp parallel for
    MultiChannelImageT<int> lastfeats = currentfeats;

    for ( int tree = 0; tree < nbTrees; tree++ )
    {
      for ( int x = 0; x < xsize; x++ )
      {
        for ( int y = 0; y < ysize; y++ )
        {
          int t = currentfeats.get( x, y, tree );

          if ( forest[tree][t].left > 0 )
          {
            allleaf = false;
            Features feat;
            feat.feats = &feats;
            feat.cfeats = &lastfeats;
            feat.cTree = tree;
            feat.tree = &forest[tree];
            feat.integralImg = &integralImg;

            double val = forest[tree][t].feat->getVal( feat, x, y );

            if ( val < forest[tree][t].decision )
            {
              currentfeats.set( x, y, forest[tree][t].left, tree );
            }
            else
            {
              currentfeats.set( x, y, forest[tree][t].right, tree );
            }
          }
        }
      }

      //compute integral image
      int channels = ( int )labelmap.size() + feats.channels();

      if ( integralImg.width() == 0 )
      {
        int xsize = feats.width();
        int ysize = feats.height();

        integralImg.reInit( xsize, ysize, channels );
      }
    }

    computeIntegralImage( currentfeats, feats, integralImg );

    depth++;
  }

  if ( pixelWiseLabeling )
  {
    //finales labeln:
    long int offset = 0;

    for ( int x = 0; x < xsize; x++ )
    {
      for ( int y = 0; y < ysize; y++, offset++ )
      {
        double maxvalue = - numeric_limits<double>::max(); //TODO: das muss nur pro knoten gemacht werden, nicht pro pixel
        int maxindex = 0;
        uint s = forest[0][0].dist.size();

        for ( uint i = 0; i < s; i++ )
        {
          probabilities.data[labelmapback[i]][offset] = getMeanProb( x, y, i, currentfeats );

          if ( probabilities.data[labelmapback[i]][offset] > maxvalue )
          {
            maxvalue = probabilities.data[labelmapback[i]][offset];
            maxindex = labelmapback[i];
          }

          segresult.setPixel( x, y, maxindex );
        }

        if ( maxvalue > 1 )
          cout << "maxvalue: " << maxvalue << endl;
      }
    }
  }
  else
  {
    //final labeling using segmentation
    //TODO: segmentation
    Matrix regions;
    int regionNumber = segmentation->segRegions( img, regions );
    cout << "regions: " << regionNumber << endl;
    int dSize = forest[0][0].dist.size();
    vector<vector<double> > regionProbs( regionNumber, vector<double>( dSize, 0.0 ) );
    vector<int> bestlabels( regionNumber, 0 );

    /*
    for(int r = 0; r < regionNumber; r++)
    {
     Image over(img.width(), img.height());
     for(int y = 0; y < img.height(); y++)
     {
      for(int x = 0; x < img.width(); x++)
      {
       if(((int)regions(x,y)) == r)
        over.setPixel(x,y,1);
       else
        over.setPixel(x,y,0);
      }
     }
     cout << "r: " << r << endl;
     showImageOverlay(img, over);
    }
    */

    for ( int y = 0; y < img.height(); y++ )
    {
      for ( int x = 0; x < img.width(); x++ )
      {
        int cregion = regions( x, y );

        for ( int d = 0; d < dSize; d++ )
        {
          regionProbs[cregion][d] += getMeanProb( x, y, d, currentfeats );
        }
      }
    }

    int roi = 38;

    for ( int r = 0; r < regionNumber; r++ )
    {
      double maxval = regionProbs[r][0];
      bestlabels[r] = 0;

      if ( roi == r )
      {
        cout << "r: " << r << endl;
        cout << "0: " << regionProbs[r][0] << endl;
      }

      for ( int d = 1; d < dSize; d++ )
      {
        if ( maxval < regionProbs[r][d] )
        {
          maxval = regionProbs[r][d];
          bestlabels[r] = d;
        }

        if ( roi == r )
        {
          cout << d << ": " << regionProbs[r][d] << endl;
        }
      }

      if ( roi == r )
      {
        cout << "bestlabel: " << bestlabels[r] << " danach: " << labelmapback[bestlabels[r]] << endl;
      }

      bestlabels[r] = labelmapback[bestlabels[r]];
    }

    for ( int y = 0; y < img.height(); y++ )
    {
      for ( int x = 0; x < img.width(); x++ )
      {

        segresult.setPixel( x, y, bestlabels[regions( x,y )] );
      }
    }
  }
}