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Automated comparisons of bullet striations based on 3D topography
Institution:1. National Instituut voor Criminalistiek en Criminologie (INCC/NICC), Vilvoordsesteenweg 98-100, B-1120 Brussels, Belgium;2. Institut de Police Scientifique et de Criminologie, University of Lausanne, Bâtiment de Chimie, CH-1015 Lausanne-Dorigny, Switzerland;1. School of Mechatronics Engineering, Harbin Institute of Technology (HIT), Harbin, 150001, China;2. Physical Measurement Laboratory, National Institute of Standards and Technology (NIST), Gaithersburg, MD 20899, USA;1. Department of Forensic and Investigative Science, West Virginia University, P.O. Box 6121, Morgantown, WV 26506, United States;2. Department of Statistics, West Virginia University, P.O. Box 6330, Morgantown, WV 26506, United States;1. Laboratorio di Balistica Forense, via Don Gnocchi 78, 37016 Garda, Verona, Italy;2. Forensic Firearm Examiner, Novara, Italy;3. Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo 1, 35131 Padova, Italy;1. EPSRC Future Metrology Hub, University of Huddersfield, UK;2. Swords and Pistols Ltd., UK
Abstract:A system capable of comparing the signatures on bullets in the field of firearms identification is presented. It is based on the recording of the topography of a bullet using laser profilometry. A procedure to derive a one-dimensional array of characteristics out of the recorded data is presented. These so-called feature vectors are compared with similar quantities from other bullets using a correlation technique. Good results were obtained for weapons leaving well-defined characteristics.
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