Publication Date
5-2013
Advisor(s) - Committee Chair
Phillip C. Womble (Director), Keith Andrew, Edward Kintzel
Degree Program
Department of Physics and Astronomy
Degree Type
Master of Science
Abstract
All firearms within the United States are required by the Gun Control Act to be physically marked with a serial number; which is at least 0.003” in depth and 1/16” in height. The purpose of a serial number is to make each firearm uniquely identifiable and traceable. Intentional removal of a serial number is a criminal offense and is used to hide the identity and movements of the involved criminal parties. The current standard for firearm serial number restoration is by chemical etching; which is time & labor intensive as well as destructive to the physical evidence (firearm). It is hypothesized that a new technique that is accurate, precise, and time efficient will greatly aid law enforcement agencies in pursuing criminals. This thesis focuses on using a large chamber scanning electron microscope to take secondary electron (SE) images of a stamped metal plate and analyzing them using the MIRA MX 7 UE image processing software for purposes of depth determination. An experimental peak luminance value of 77 (pixel values) was correlated to the known depth (273 μm) at the bottom of the sample character. Results show that it is potentially possible to determine an unknown depth from a SEM image; using luminance values obtained in the MIRA analysis.
Disciplines
Atomic, Molecular and Optical Physics | Criminology and Criminal Justice | Other Legal Studies | Physics | Quantum Physics
Recommended Citation
Jones, Eric Douglas, "Forensic Investigation of Stamped Markings Using a Large-Chamber Scanning Electron Microscope and Computer Analysis for Depth Determination" (2013). Masters Theses & Specialist Projects. Paper 1237.
https://digitalcommons.wku.edu/theses/1237
Included in
Atomic, Molecular and Optical Physics Commons, Criminology and Criminal Justice Commons, Other Legal Studies Commons, Quantum Physics Commons