Quantitative Analysis of Flash-Pulse Thermographic Detection of Gunshot Residue

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Quantitative Analysis of Flash-Pulse Thermographic Detection of Gunshot Residue

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Quantitative Analysis of Flash-Pulse Thermographic Detection of Gunshot Residue

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

<a href="/cs/project/VK01010037" target="_blank" >VK01010037: Metodika rychlé bezkontaktní a nedestruktivní detekce zplodin výstřelu</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název statě ve sborníku

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

ISBN

—

ISSN

2504-3900

e-ISSN

2504-3900

Počet stran výsledku

4

Strana od-do

—

Název nakladatele

MDPI

Místo vydání

Kobe

Místo konání akce

Kobe, Japonsko

Datum konání akce

15. 9. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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