A Lightweight DFT-Based Approach to the Optical Measurement of Displacements Using an Open-Source Python Code

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F22%3A00350947" target="_blank" >RIV/68407700:21110/22:00350947 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1007/s40799-021-00488-8" target="_blank" >https://doi.org/10.1007/s40799-021-00488-8</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s40799-021-00488-8" target="_blank" >10.1007/s40799-021-00488-8</a>

Result language
angličtina
Original language name
A Lightweight DFT-Based Approach to the Optical Measurement of Displacements Using an Open-Source Python Code
Original language description
Commonly available digital image correlation (DIC) tools are designed to evaluate displacement/deformation fields using well-optimized correlation functions and computational procedures. However, real-time monitoring at high sampling rates or tracking motion at predefined locations from large sequence images can be hardly accomplished due to extreme computational costs. As shown in this paper, a lightweight approach based on the registration of subpixel subset shifts using discrete Fourier transform (DFT) can easily tackle large sets of images if the measurement is limited to discrete locations. A simple open-source python software designed for evaluation of displacements using virtual extensometers is described in this paper, along with the analysis of its performance. It is shown that the DFT-based algorithms outperform a commonly used DIC package in terms of computational efficiency and required user interactions, without sacrificing precision and accuracy.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)

Project
<a href="/en/project/GA19-20666S" target="_blank" >GA19-20666S: Shrinkage-induced deformations and microcracking in structural concrete - monitoring, modeling and identification</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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