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Proceedings Paper

3D imaging for ballistics analysis using chromatic white light sensor
Author(s): Andrey Makrushin; Mario Hildebrandt; Jana Dittmann; Eric Clausing; Robert Fischer; Claus Vielhauer
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Paper Abstract

The novel application of sensing technology, based on chromatic white light (CWL), gives a new insight into ballistic analysis of cartridge cases. The CWL sensor uses a beam of white light to acquire highly detailed topography and luminance data simultaneously. The proposed 3D imaging system combines advantages of 3D and 2D image processing algorithms in order to automate the extraction of firearm specific toolmarks shaped on fired specimens. The most important characteristics of a fired cartridge case are the type of the breech face marking as well as size, shape and location of extractor, ejector and firing pin marks. The feature extraction algorithm normalizes the casing surface and consistently searches for the appropriate distortions on the rim and on the primer. The location of the firing pin mark in relation to the lateral scratches on the rim provides unique rotation invariant characteristics of the firearm mechanisms. Additional characteristics are the volume and shape of the firing pin mark. The experimental evaluation relies on the data set of 15 cartridge cases fired from three 9mm firearms of different manufacturers. The results show very high potential of 3D imaging systems for casing-based computer-aided firearm identification, which is prospectively going to support human expertise.

Paper Details

Date Published: 30 January 2012
PDF: 12 pages
Proc. SPIE 8290, Three-Dimensional Image Processing (3DIP) and Applications II, 829016 (30 January 2012); doi: 10.1117/12.908105
Show Author Affiliations
Andrey Makrushin, Otto-von-Guericke-Univ. of Magdeburg (Germany)
Mario Hildebrandt, Otto-von-Guericke-Univ. of Magdeburg (Germany)
Jana Dittmann, Otto-von-Guericke-Univ. of Magdeburg (Germany)
Eric Clausing, Otto-von-Guericke-Univ. of Magdeburg (Germany)
Robert Fischer, Brandenburg Univ. of Applied Sciences (Germany)
Claus Vielhauer, Brandenburg Univ. of Applied Sciences (Germany)


Published in SPIE Proceedings Vol. 8290:
Three-Dimensional Image Processing (3DIP) and Applications II
Atilla M. Baskurt; Robert Sitnik, Editor(s)

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