sample_set.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 "sample_set.h"
  22
  23 SampleSet::SampleSet(int nb_features, int nb_samples) {
  24   _nb_features = nb_features;
  25   _nb_samples = nb_samples;
  26   _shared_feature_values = new SharedResponses(_nb_features, _nb_samples);
  27   _shared_feature_values->grab();
  28
  29   _labels = new int[_nb_samples];
  30   _feature_values = new scalar_t *[_nb_samples];
  31   for(int s = 0; s < _nb_samples; s++)
  32     _feature_values[s] = _shared_feature_values->_responses + _nb_features * s;
  33
  34 }
  35
  36 SampleSet::SampleSet(SampleSet *father, int nb, int *indexes) {
  37   _nb_features = father->_nb_features;
  38   _nb_samples = nb;
  39   _shared_feature_values = father->_shared_feature_values;
  40   _shared_feature_values->grab();
  41
  42   _labels = new int[_nb_samples];
  43   _feature_values = new scalar_t *[_nb_samples];
  44   for(int s = 0; s < _nb_samples; s++) {
  45     _feature_values[s] = father->_feature_values[indexes[s]];
  46     _labels[s] = father->_labels[indexes[s]];
  47   }
  48 }
  49
  50 SampleSet::~SampleSet() {
  51   _shared_feature_values->release();
  52   delete[] _feature_values;
  53   delete[] _labels;
  54 }
  55
  56 void SampleSet::set_sample(int n,
  57                            PiFeatureFamily *pi_feature_family,
  58                            RichImage *image,
  59                            PoseCell *cell, int label) {
  60   ASSERT(n >= 0 && n < _nb_samples);
  61   _labels[n] = label;
  62   PiReferential referential(cell);
  63   for(int f = 0; f < _nb_features; f++) {
  64     _feature_values[n][f] = pi_feature_family->get_feature(f)->response(image, &referential);
  65     ASSERT(!isnan(_feature_values[n][f]));
  66   }
  67 }