Quantitative Analysis of Flash-Pulse Thermographic Detection of Gunshot Residue

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F25%3A43977866" target="_blank" >RIV/49777513:23640/25:43977866 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.3390/proceedings2025129062" target="_blank" >https://doi.org/10.3390/proceedings2025129062</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/proceedings2025129062" target="_blank" >10.3390/proceedings2025129062</a>

Result language

angličtina

Original language name

Quantitative Analysis of Flash-Pulse Thermographic Detection of Gunshot Residue

Original language description

This study addresses the detection of gunshot residue (GSR) around a bullet hole, which is one of the key forensic procedures for estimating the firing distance. GSR was inspected using flash-pulse thermography (FPT) with Kurtosis statistical processing. The result of such an inspection is a pattern composed of numerous small indications distributed around the hole, attributed to gunshot residue particles. The number and spatial distribution of these indications depend on the firing distance. Analyzing such results based on individual indications is impractical, as the pattern must be evaluated as a whole. Therefore, quantifying the overall result can significantly improve the analysis of the firing distance estimation. This study presents a quantification procedure based on threshold-based mass-marking of indications and evaluation of several statistical characteristics. The correlation between these characteristics and firing distance is then analyzed. A strong but distinctly nonlinear correlation was found between the firing distance and some simple quantitative characteristics, such as the total number of indications. However, the study shows that some derived characteristics, such as the contrast between marked areas and background, exhibit a near-linear correlation. These parameters are, therefore, promising for firing distance analysis based on FPT inspection of GSR on through-shot targets.

Czech name

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Czech description

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Type

D - Article in proceedings

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

2025

Confidentiality

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

Article name in the collection

Proceedings The 18th International Workshop on Advanced Infrared Technology and Applications

ISBN

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ISSN

2504-3900

e-ISSN

2504-3900

Number of pages

4

Pages from-to

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Publisher name

MDPI

Place of publication

Kobe

Event location

Kobe, Japonsko

Event date

Sep 15, 2025

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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