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Correlation of Topography Measurements of NIST SRM 2460 Standard Bullets by Four Techniques
Published
Author(s)
Jun-Feng Song, Theodore V. Vorburger, Thomas Brian Renegar, Xiaoyu Alan Zheng, Hyug-Gyo Rhee, John M. Libert, Li Ma, K Bogart, Susan M. Ballou, B Bachrach
Abstract
Three optical instruments including an interferometric microscope, a Nipkow disk confocal microscope and a laser scanning confocal microscope are used for the measurements of bullet profile signatures of a National Institute of Standards and Technology (NIST) Standard Reference Material (SRM) 2460 standard bullet. The 2D profile signatures are compared with the virtual bullet standard signature established by a stylus-based measurement system at NIST. The bullet signature differences are quantified by the maximum cross-correlation function CCFmax. If the compared signatures were exactly the same, CCFmax would be 100%. Comparison results show close agreement among the four techniques for bullet profile signature measurements. The average CCFmax values are higher than 90%. This supports the possibility of using surface topography techniques for ballistic identifications as an alternative to the current technology based on image comparisons.
Citation
Measurement Science & Technology
Volume
17
Pub Type
Journals
Keywords
auto-correlation function, confocal microscope, cross-correlation function, standard bullet, standard reference material, topography comparison
Song, J.
, Vorburger, T.
, Renegar, T.
, Zheng, X.
, Rhee, H.
, Libert, J.
, Ma, L.
, Bogart, K.
, Ballou, S.
and Bachrach, B.
(2006),
Correlation of Topography Measurements of NIST SRM 2460 Standard Bullets by Four Techniques, Measurement Science & Technology
(Accessed October 7, 2025)