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+
+///////////////////////////////////////////////////////////////////////////
+// This program is free software: you can redistribute it and/or modify  //
+// it under the terms of the version 3 of the GNU General Public License //
+// as published by the Free Software Foundation.                         //
+//                                                                       //
+// This program is distributed in the hope that it will be useful, but   //
+// WITHOUT ANY WARRANTY; without even the implied warranty of            //
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      //
+// General Public License for more details.                              //
+//                                                                       //
+// You should have received a copy of the GNU General Public License     //
+// along with this program. If not, see <http://www.gnu.org/licenses/>.  //
+//                                                                       //
+// Written by Francois Fleuret, (C) IDIAP                                //
+// Contact <francois.fleuret@idiap.ch> for comments & bug reports        //
+///////////////////////////////////////////////////////////////////////////
+
+/*
+
+  This is the main class, a folded hierarchy of classifiers.
+
+*/
+
+#ifndef DETECTOR_H
+#define DETECTOR_H
+
+#include "storable.h"
+#include "boosted_classifier.h"
+#include "labelled_image_pool.h"
+#include "parsing_pool.h"
+#include "pose_cell_scored_set.h"
+
+class Detector : public Storable {
+public:
+  PoseCellHierarchy *_hierarchy;
+  int _nb_levels, _nb_classifiers_per_level, _nb_classifiers;
+  scalar_t *_thresholds;
+  Classifier **_classifiers;
+  PiFeatureFamily **_pi_feature_families;
+
+  void free();
+
+  virtual void train_classifier(int level,
+                                LossMachine *loss_machine,
+                                ParsingPool *parsing,
+                                PiFeatureFamily *pi_feature_family,
+                                Classifier *classifier);
+
+  virtual void parse_rec(RichImage *image, int level,
+                         PoseCell *cell, scalar_t response,
+                         PoseCellScoredSet *result);
+
+public:
+
+  Detector();
+  virtual ~Detector();
+
+  inline int nb_levels() { return _nb_levels; }
+
+  // The validation set is only used to save ROCs curves during
+  // training for monitoring the learning
+
+  virtual void train(LabelledImagePool *train_pool,
+                     LabelledImagePool *validation_pool,
+                     LabelledImagePool *hierarchy_pool);
+
+  virtual void compute_thresholds(LabelledImagePool *validation_pool, scalar_t wanted_tp);
+
+  virtual void parse(RichImage *image, PoseCellScoredSet *result_cell_set);
+
+  virtual void read(istream *is);
+  virtual void write(ostream *os);
+};
+
+#endif