pi_feature_family.cc

   1 /*
   2  *  folded-ctf is an implementation of the folded hierarchy of
   3  *  classifiers for object detection, developed by Francois Fleuret
   4  *  and Donald Geman.
   5  *
   6  *  Copyright (c) 2008 Idiap Research Institute, http://www.idiap.ch/
   7  *  Written by Francois Fleuret <francois.fleuret@idiap.ch>
   8  *
   9  *  This file is part of folded-ctf.
  10  *
  11  *  folded-ctf is free software: you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published
  13  *  by the Free Software Foundation, either version 3 of the License,
  14  *  or (at your option) any later version.
  15  *
  16  *  folded-ctf is distributed in the hope that it will be useful, but
  17  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  *  General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with folded-ctf.  If not, see <http://www.gnu.org/licenses/>.
  23  *
  24  */
  25
  26 #include "pi_feature_family.h"
  27
  28 PiFeatureFamily::PiFeatureFamily() {
  29   _nb_features = 0;
  30   _pi_features = 0;
  31 }
  32
  33 PiFeatureFamily::~PiFeatureFamily() {
  34   delete[] _pi_features;
  35 }
  36
  37 void PiFeatureFamily::read(istream *is) {
  38   delete[] _pi_features;
  39   read_var(is, &_nb_features);
  40   _pi_features = new PiFeature[_nb_features];
  41   is->read((char *) _pi_features, sizeof(PiFeature) * _nb_features);
  42 }
  43
  44 void PiFeatureFamily::write(ostream *os) {
  45   write_var(os, &_nb_features);
  46   os->write((char *) _pi_features, sizeof(PiFeature) * _nb_features);
  47 }
  48
  49 void PiFeatureFamily::resize(int nb_features) {
  50   delete[] _pi_features;
  51   _nb_features = nb_features;
  52   _pi_features = new PiFeature[_nb_features];
  53 }
  54
  55 void PiFeatureFamily::randomize(int level) {
  56   for(int f = 0; f < _nb_features; f++) _pi_features[f].randomize(level);
  57 }
  58
  59 void PiFeatureFamily::extract(PiFeatureFamily *pi_feature_family,
  60                               bool *used_features, int *new_feature_indexes) {
  61   delete[] _pi_features;
  62   _nb_features = 0;
  63
  64   for(int f = 0; f < pi_feature_family->nb_features(); f++)
  65     if(used_features[f]) _nb_features++;
  66
  67   _pi_features = new PiFeature[_nb_features];
  68
  69   int g = 0;
  70
  71   for(int f = 0; f < pi_feature_family->nb_features(); f++)
  72     if(used_features[f]) {
  73       _pi_features[g] = pi_feature_family->_pi_features[f];
  74       new_feature_indexes[f] = g;
  75       g++;
  76     } else new_feature_indexes[f] = -1;
  77 }