1. Computer Vision and Image Processing Group, School of Science and Engineering, University of Dundee, Dundee DD1 4HN, UK
2. Forensic Medicine Unit, Department of Forensic Sciences, School of Medicine, University of Crete, 70013 Heraklion, Greece
3. Centre for Anatomy and Human Identification, School of Science and Engineering, University of Dundee, Dundee DD1 5EH, UK