Skip to content

Comparing Cartridge Breechface Marks: 2D versus 3D

Type: Webinar
Research Area: Firearms and Toolmarks

This CSAFE Center Wide Webinar was presented by Xiao Hui Tai from Carnegie Mellon University on January 31, 2018.

Description:

We will describe work that we have done on an automated method to compare breechface marks on 2D images of cartridge cases, and how this transfers to 3D topographies. We will discuss various studies and compare the results for 2D and 3D data. In the future, such algorithms may be used by examiners for blind verification or for quantifying the weight of evidence.

Related Resources

Is it a True Match? Top k correlations in a database search

Is it a True Match? Top k correlations in a database search

This presentation is from the 76th Annual Conference of the American Academy of Forensic Sciences (AAFS), Denver, Colorado, February 19-24, 2024.
Read More
Forensic Toolmark Comparisons

Forensic Toolmark Comparisons

Forensic practitioners determine whether two marks were generated by the same tool by observing the 2D images of the marks using a comparison microscope and deciding whether the “surface contours…
Read More
Effect of Subclass Characteristics on Congruent Matching Cells (CMC) Algorithm

Effect of Subclass Characteristics on Congruent Matching Cells (CMC) Algorithm

This presentation is a continuation of subclass characteristics present on consecutively manufactured breech face inserts. The objective is to assess manufacturing methods similar to those used by firearm manufacturers. It…
Read More
Diagnostic Tools for Automatic Cartridge Case Comparisons

Diagnostic Tools for Automatic Cartridge Case Comparisons

The following was presented at the Association of Firearm and Tool Mark Examiners (AFTE) 2023, Austin, Texas, May 21-26, 2023. Copyright 2023, The Authors. Posted with permission of CSAFE.
Read More