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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        //
+///////////////////////////////////////////////////////////////////////////
+
+#ifndef PARSING_H
+#define PARSING_H
+
+/*
+
+  A Parsing is associated to a LabelledImage and stores responses over
+  cells.
+
+*/
+
+#include "fusion_sort.h"
+#include "pose_cell_hierarchy.h"
+#include "classifier.h"
+#include "labelled_image.h"
+
+class Parsing {
+  LabelledImagePool *_image_pool;
+  int _image_index;
+  int _nb_cells, _nb_positives, _nb_negatives;
+
+  PoseCell *_cells;
+  scalar_t *_responses;
+  int *_labels;
+
+public:
+
+  Parsing(LabelledImagePool *image_pool,
+          PoseCellHierarchy *hierarchy,
+          scalar_t proportion_negative_cells,
+          int image_index);
+
+  ~Parsing();
+
+  //////////////////////////////////////////////////////////////////////
+
+  inline int nb_cells() {
+    return _nb_cells;
+  }
+
+  inline int nb_positive_cells() {
+    return _nb_positives;
+  }
+
+  inline int nb_negative_cells() {
+    return _nb_negatives;
+  }
+
+  inline scalar_t response(int c) {
+    ASSERT(c >= 0 && c < _nb_cells);
+    return _responses[c];
+  }
+
+  inline int label(int c) {
+    ASSERT(c >= 0 && c < _nb_cells);
+    return _labels[c];
+  }
+
+  void down_one_level(PoseCellHierarchy *hierarchy, int level, int *sample_nb_occurences, scalar_t *sample_responses);
+
+  void update_cell_responses(PiFeatureFamily *pi_feature_family,
+                             Classifier *classifier);
+
+  void collect_samples(SampleSet *samples,
+                       PiFeatureFamily *pi_feature_family,
+                       int s,
+                       int *to_collect);
+};
+
+#endif