pi_feature_family.cc

   1
   2 ///////////////////////////////////////////////////////////////////////////
   3 // This program is free software: you can redistribute it and/or modify  //
   4 // it under the terms of the version 3 of the GNU General Public License //
   5 // as published by the Free Software Foundation.                         //
   6 //                                                                       //
   7 // This program is distributed in the hope that it will be useful, but   //
   8 // WITHOUT ANY WARRANTY; without even the implied warranty of            //
   9 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      //
  10 // General Public License for more details.                              //
  11 //                                                                       //
  12 // You should have received a copy of the GNU General Public License     //
  13 // along with this program. If not, see <http://www.gnu.org/licenses/>.  //
  14 //                                                                       //
  15 // Written by Francois Fleuret                                           //
  16 // (C) Idiap Research Institute                                          //
  17 //                                                                       //
  18 // Contact <francois.fleuret@idiap.ch> for comments & bug reports        //
  19 ///////////////////////////////////////////////////////////////////////////
  20
  21 #include "pi_feature_family.h"
  22
  23 PiFeatureFamily::PiFeatureFamily() {
  24   _nb_features = 0;
  25   _pi_features = 0;
  26 }
  27
  28 PiFeatureFamily::~PiFeatureFamily() {
  29   delete[] _pi_features;
  30 }
  31
  32 void PiFeatureFamily::read(istream *is) {
  33   delete[] _pi_features;
  34   read_var(is, &_nb_features);
  35   _pi_features = new PiFeature[_nb_features];
  36   is->read((char *) _pi_features, sizeof(PiFeature) * _nb_features);
  37 }
  38
  39 void PiFeatureFamily::write(ostream *os) {
  40   write_var(os, &_nb_features);
  41   os->write((char *) _pi_features, sizeof(PiFeature) * _nb_features);
  42 }
  43
  44 void PiFeatureFamily::resize(int nb_features) {
  45   delete[] _pi_features;
  46   _nb_features = nb_features;
  47   _pi_features = new PiFeature[_nb_features];
  48 }
  49
  50 void PiFeatureFamily::randomize(int level) {
  51   for(int f = 0; f < _nb_features; f++) _pi_features[f].randomize(level);
  52 }
  53
  54 void PiFeatureFamily::extract(PiFeatureFamily *pi_feature_family,
  55                               bool *used_features, int *new_feature_indexes) {
  56   delete[] _pi_features;
  57   _nb_features = 0;
  58
  59   for(int f = 0; f < pi_feature_family->nb_features(); f++)
  60     if(used_features[f]) _nb_features++;
  61
  62   _pi_features = new PiFeature[_nb_features];
  63
  64   int g = 0;
  65
  66   for(int f = 0; f < pi_feature_family->nb_features(); f++)
  67     if(used_features[f]) {
  68       _pi_features[g] = pi_feature_family->_pi_features[f];
  69       new_feature_indexes[f] = g;
  70       g++;
  71     } else new_feature_indexes[f] = -1;
  72 }