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diff --git a/pose_cell.h b/pose_cell.h
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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 POSE_CELL_H
+#define POSE_CELL_H
+
+#include "pose.h"
+#include "interval.h"
+
+class PoseCell {
+public:
+
+  Interval _head_xc, _head_yc, _head_radius, _head_tilt;
+  Interval _body_xc, _body_yc;
+
+  // The cell contains the pose
+
+  bool contains(Pose *pose);
+
+  // The pose is far enough from the cell to accept the cell as a
+  // negative sample
+
+  bool negative_for_train(Pose *pose);
+
+  // Copies into pose the average pose of that cell
+
+  void get_centroid(Pose *pose);
+
+  void print(ostream *out);
+};
+
+#endif