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. //
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. //
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/>. //
15 // Written by Francois Fleuret //
16 // (C) Idiap Research Institute //
18 // Contact <francois.fleuret@idiap.ch> for comments & bug reports //
19 ///////////////////////////////////////////////////////////////////////////
23 This class is almost purely virtual. It represents a classifier that
24 can be trained from a SampleSet and able to provide a scalar
25 response on any test sample. Additional methods are required for
26 persistence and select the possibly very few used features.
34 #include "pi_feature_family.h"
35 #include "sample_set.h"
36 #include "pose_cell_hierarchy.h"
37 #include "labelled_image_pool.h"
38 #include "loss_machine.h"
40 class Classifier : public Storable {
42 virtual ~Classifier();
44 // Evaluate on a sample
45 virtual scalar_t response(SampleSet *sample_set, int n_sample) = 0;
47 // Train the classifier
48 virtual void train(LossMachine *loss_machine, SampleSet *train, scalar_t *response) = 0;
50 // Tag in the boolean array which features are actually used
51 virtual void tag_used_features(bool *used) = 0;
52 // Change the indexes of the used features
53 virtual void re_index_features(int *new_indexes) = 0;
56 virtual void read(istream *is) = 0;
57 virtual void write(ostream *os) = 0;
59 void extract_pi_feature_family(PiFeatureFamily *full_pi_feature_family,
60 PiFeatureFamily *extracted_pi_feature_family);