Image-based tracking technique assessment and application to a fluid–structure interaction experiment

Mella, DA, Brevis, W, Higham, JE ORCID: 0000-0001-7577-0913, Racic, V and Susmel, L (2019) Image-based tracking technique assessment and application to a fluid–structure interaction experiment. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 233 (16). pp. 5724-5734.

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Official URL: http://dx.doi.org/10.1177/0954406219853852

Abstract

© IMechE 2019. This work analyses the accuracy and capabilities of two image-based tracking techniques related to digital image correlation and the Lucas–Kanade optical flow method, with the subsequent quantification of body motion in a fluid–structure interaction experiment. A computer-controlled shaker was used as a benchmark case to create a one-dimensional oscillatory target motion. Three target frequencies were recorded. The measurements obtained with a low-cost digital camera were compared to a high-precision motion tracking system. The comparison was performed under changes in image resolution, target motion and sampling frequency. The results show that, with a correct selection of the processing parameters, both tracking techniques were able to track the main motion and frequency of the target even after a reduction of four and five times the sampling frequency and image resolution, respectively. Within this good agreement, the Lucas–Kanade technique shows better accuracy under tested conditions, achieving up to 15.6% of lower tracking error. Nevertheless, the achievement of this higher accuracy is highly dependent on the position of the selected initial target point. These considerations are addressed to satisfactorily track the response of a wall-mounted cylinder subjected to a range of turbulent flows using a single camera as the measuring device.

Item Type:	Article
Uncontrolled Keywords:	Bioengineering
Depositing User:	Symplectic Admin
Date Deposited:	12 Feb 2020 11:26
Last Modified:	15 Mar 2024 14:56
DOI:	10.1177/0954406219853852
Open Access URL:	http://eprints.whiterose.ac.uk/145851/
Related URLs:	Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3055611