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diff --git a/pose_cell.cc b/pose_cell.cc
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+++ b/pose_cell.cc
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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        //
+///////////////////////////////////////////////////////////////////////////
+
+#include "pose_cell.h"
+#include "global.h"
+#include "tools.h"
+
+bool PoseCell::contains(Pose *pose) {
+  return
+    _head_xc.contains(pose->_head_xc) &&
+    _head_yc.contains(pose->_head_yc) &&
+    _head_radius.contains(pose->_head_radius) &&
+    _body_xc.contains(pose->_body_xc) &&
+    _body_yc.contains(pose->_body_yc);
+}
+
+bool PoseCell::negative_for_train(Pose *pose) {
+  const scalar_t r_tolerance = 3;
+  scalar_t r = pose->_head_radius;
+  return
+    r <= _head_radius.min / r_tolerance ||
+    r >= _head_radius.max * r_tolerance ||
+    pose->_head_xc <= _head_xc.min - r ||
+    pose->_head_xc >= _head_xc.max + r ||
+    pose->_head_yc <= _head_yc.min - r ||
+    pose->_head_yc >= _head_yc.max + r;
+}
+
+void PoseCell::get_centroid(Pose *pose) {
+  pose->_bounding_box_xmin = -1;
+  pose->_bounding_box_ymin = -1;
+  pose->_bounding_box_xmax = -1;
+  pose->_bounding_box_ymax = -1;
+  pose->_head_radius = sqrt(_head_radius.min * _head_radius.max);
+  pose->_head_xc = _head_xc.middle();
+  pose->_head_yc = _head_yc.middle();
+  pose->_body_xc = _body_xc.middle();
+  pose->_body_yc = _body_yc.middle();
+}
+
+void PoseCell::print(ostream *out) {
+  (*out) << "  _head_xc " << _head_xc << endl;
+  (*out) << "  _head_yc " << _head_yc << endl;
+  (*out) << "  _head_radius " << _head_radius << endl;
+  (*out) << "  _head_tilt " << _head_tilt << endl;
+  (*out) << "  _body_xc " << _body_xc << endl;
+  (*out) << "  _body_yc " << _body_yc << endl;
+}