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Proposed Bullet Signature Comparisons Using Autocorrelation Functions



Jun-Feng Song, Theodore V. Vorburger


The National Institute of Standards and Technology (NIST) standard bullets and casings are intended as reference standards for crime laboratories to help verify that the computerized optical-imaging equipment in those laboratories is operating properly. They will be used for instrument calibrations and measurement quality control, and would facilitate the nationwide and even worldwide traceability and unification of ballistics measurements. In 1998, two prototype standard bullets were developed at NIST using a numerically controlled (NC) diamond turning technique. Test results showed that their bullet signatures are highly repeatable and reproducible. Based on these prototypes, NIST SRM (Standard Reference Material) bullets are planned to be developed. In order to inspect and control the quality of these NIST standard bullets, a parameter using auto- and cross-correlation functions is proposed here for comparing and quantifying the similarity, repeatability, and reproducibility of bullet signatures on different standard bullets.
Proceedings Title
Proceedings of National Conference of Standards Laboratories
Conference Dates
July 1, 2000
Conference Location
Toronto, CA


autocorrelation function, bullet signature, cross-correlation, SRM, standard bullet, standard reference material


Song, J. and Vorburger, T. (2000), Proposed Bullet Signature Comparisons Using Autocorrelation Functions, Proceedings of National Conference of Standards Laboratories, Toronto, CA (Accessed May 28, 2024)


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Created July 1, 2000, Updated February 19, 2017