Towards reliable crack growth monitoring: a preliminary study on fiducial marker-based camera repositioning errors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F25%3A00644441" target="_blank" >RIV/68378297:_____/25:00644441 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.12783/shm2025/37369" target="_blank" >https://doi.org/10.12783/shm2025/37369</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.12783/shm2025/37369" target="_blank" >10.12783/shm2025/37369</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Towards reliable crack growth monitoring: a preliminary study on fiducial marker-based camera repositioning errors

Popis výsledku v původním jazyce

This study explores the precision and practical feasibility of using fiducial markers and projective transformations for non-contact displacement measurement in structural monitoring applications. By tracking a grid of ArUco markers affixed to a planar surface, image alignment was achieved using homography-based rectification, enabling subpixel accuracy in displacement and strain evaluation. A high-resolution industrial camera setup with calibrated optics and image averaging was used to minimize noise. The impact of camera repositioning errors - translational and rotational – on displacement accuracy was systematically evaluated through three controlled scenarios. Results show that while minor displacements (e.g., 5 mm shifts) can introduce errors up to hundreds of micrometres, careful alignment and the use of projective correction significantly reduce this effect. The findings highlight both the promise and the limitations of this low-cost, repeatable approach, especially for applications such as crack monitoring, where high spatial precision is required.

Název v anglickém jazyce

Towards reliable crack growth monitoring: a preliminary study on fiducial marker-based camera repositioning errors

Popis výsledku anglicky

This study explores the precision and practical feasibility of using fiducial markers and projective transformations for non-contact displacement measurement in structural monitoring applications. By tracking a grid of ArUco markers affixed to a planar surface, image alignment was achieved using homography-based rectification, enabling subpixel accuracy in displacement and strain evaluation. A high-resolution industrial camera setup with calibrated optics and image averaging was used to minimize noise. The impact of camera repositioning errors - translational and rotational – on displacement accuracy was systematically evaluated through three controlled scenarios. Results show that while minor displacements (e.g., 5 mm shifts) can introduce errors up to hundreds of micrometres, careful alignment and the use of projective correction significantly reduce this effect. The findings highlight both the promise and the limitations of this low-cost, repeatable approach, especially for applications such as crack monitoring, where high spatial precision is required.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/EH23_020%2F0008487" target="_blank" >EH23_020/0008487: Inovativní metody diagnostiky materiálů a monitoringu inženýrské infrastruktury pro zvýšení její odolnosti a životnosti (INODIN)</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název statě ve sborníku

Structural health monitoring 2025. Proceedings of the 15th International workshop on structural health monitoring

ISBN

978-1-60595-699-2

ISSN

—

e-ISSN

—

Počet stran výsledku

8

Strana od-do

854-861

Název nakladatele

DEStech Publications

Místo vydání

Lancaster (PA)

Místo konání akce

Stanford

Datum konání akce

9. 9. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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