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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Towards reliable crack growth monitoring: a preliminary study on fiducial marker-based camera repositioning errors
Original language description
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.
Czech name
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Czech description
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Project
<a href="/en/project/EH23_020%2F0008487" target="_blank" >EH23_020/0008487: Innovative methods of materials diagnostics and monitoring of engineering infrastructure to increase its durability and service time (INODIN)</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Structural health monitoring 2025. Proceedings of the 15th International workshop on structural health monitoring
ISBN
978-1-60595-699-2
ISSN
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e-ISSN
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Number of pages
8
Pages from-to
854-861
Publisher name
DEStech Publications
Place of publication
Lancaster (PA)
Event location
Stanford
Event date
Sep 9, 2025
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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