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 version 3 as
  13  *  published by the Free Software Foundation.
  14  *
  15  *  folded-ctf is distributed in the hope that it will be useful, but
  16  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  *  General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with folded-ctf.  If not, see <http://www.gnu.org/licenses/>.
  22  *
  23  */
  24
  25 #include "pi_feature_family.h"
  26
  27 PiFeatureFamily::PiFeatureFamily() {
  28   _nb_features = 0;
  29   _pi_features = 0;
  30 }
  31
  32 PiFeatureFamily::~PiFeatureFamily() {
  33   delete[] _pi_features;
  34 }
  35
  36 void PiFeatureFamily::read(istream *is) {
  37   delete[] _pi_features;
  38   read_var(is, &_nb_features);
  39   _pi_features = new PiFeature[_nb_features];
  40   is->read((char *) _pi_features, sizeof(PiFeature) * _nb_features);
  41 }
  42
  43 void PiFeatureFamily::write(ostream *os) {
  44   write_var(os, &_nb_features);
  45   os->write((char *) _pi_features, sizeof(PiFeature) * _nb_features);
  46 }
  47
  48 void PiFeatureFamily::resize(int nb_features) {
  49   delete[] _pi_features;
  50   _nb_features = nb_features;
  51   _pi_features = new PiFeature[_nb_features];
  52 }
  53
  54 void PiFeatureFamily::randomize(int level) {
  55   for(int f = 0; f < _nb_features; f++) _pi_features[f].randomize(level);
  56 }
  57
  58 void PiFeatureFamily::extract(PiFeatureFamily *pi_feature_family,
  59                               bool *used_features, int *new_feature_indexes) {
  60   delete[] _pi_features;
  61   _nb_features = 0;
  62
  63   for(int f = 0; f < pi_feature_family->nb_features(); f++)
  64     if(used_features[f]) _nb_features++;
  65
  66   _pi_features = new PiFeature[_nb_features];
  67
  68   int g = 0;
  69
  70   for(int f = 0; f < pi_feature_family->nb_features(); f++)
  71     if(used_features[f]) {
  72       _pi_features[g] = pi_feature_family->_pi_features[f];
  73       new_feature_indexes[f] = g;
  74       g++;
  75     } else new_feature_indexes[f] = -1;
  76 }