Skip to content

A Pipeline for Cartridge Case Comparisons

Conference/Workshop:
International Association for Identification (IAI) Annual Educational Conference
Published: 2022
Primary Author: Joseph Zemmels
Secondary Authors: Heike Hofmann, Susan Vanderplas
Type: Poster
Research Area: Firearms and Toolmarks

We introduce novel sub-procedures in the pre-processing, comparison and similarity feature steps. The sub-procedures result in an improved error rate compared to our implementation of the CMC method while also requiring fewer parameters. The fitted Decision tree model is easily interpretable.

Related Resources

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…
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…
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.
A Study in Reproducibility: The Congruent Matching Cells Algorithm and cmcR Package

A Study in Reproducibility: The Congruent Matching Cells Algorithm and cmcR Package

Scientific research is driven by our ability to use methods, procedures, and materials from previous studies and further research by adding to it. As the need for computationally-intensive methods to…