Detection of gunshot residue by flash-pulse and long-pulse infrared thermography

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F24%3A43972419" target="_blank" >RIV/49777513:23640/24:43972419 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.infrared.2024.105366" target="_blank" >https://doi.org/10.1016/j.infrared.2024.105366</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.infrared.2024.105366" target="_blank" >10.1016/j.infrared.2024.105366</a>

Result language

angličtina

Original language name

Detection of gunshot residue by flash-pulse and long-pulse infrared thermography

Original language description

Detection of gunshot residues (GSR) in a bullet hole area is one of the forensic investigations aiding in the reconstruction of crime scenes. Traditionally, chromogenic methods based on chemical exposure or microscopic/spectroscopic methods are used for this purpose. In this study, we explore the applicability of active excitation infrared thermography methods for GSR detection in the bullet hole area on fabric samples. A standard 9mm full metal jacket ammunition with a nickel-plated shell and natural cotton fabric samples were used for experiments in this study. The applicability of active thermography methods based on two different light/heat excitation sources to detect the GSR was investigated. Flash-pulse and long-pulse thermography were compared through an experimental investigation. We evaluated the effectiveness of various thermographic data processing methods, including background subtraction, temperature derivative analysis, Fourier transform phase analysis, principal component analysis, and higher-order statistics for GSR evaluation. Our findings demonstrate that flash-pulse thermography and kurtosis analysis yield the highest contrast-to-noise ratio (CNR) and produce sharp, clear images of GSR, making it the optimal method for thermographic GSR detection. Our study indicates that even though the GSR particles are tiny, they can produce sufficient contrast to be detected by the thermographic methods if appropriate experimental and post-processing procedures are used. Thus, these methods could complement GSR detection as they are non- destructive and offer rapid inspection.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

<a href="/en/project/VK01010037" target="_blank" >VK01010037: Methodology of fast non-contact and non-destructive detection of gunshot residue</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Infrared Physics &amp; Technology

ISSN

1350-4495

e-ISSN

1879-0275

Volume of the periodical

140

Issue of the periodical within the volume

AUG 2024

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

12

Pages from-to

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UT code for WoS article

001250238800001

EID of the result in the Scopus database

2-s2.0-85195099616