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The Influence of Camera Calibration on Nearshore Bathymetry Estimation from UAV Videos

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URI: http://hdl.handle.net/10498/24415

DOI: 10.3390/rs13010150

ISSN: 2072-4292

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2021_058.pdf (13.01Mb)
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Author/s
Simarro, Gonzalo; Calvete, Daniel; Plomaritis, TheocharisAuthority UCA; Moreno-Noguer, Fransec; Giannoukakou-Leontsini, Ifigeneia; Montes, Juan; Durán, Ruth
Date
2021-01
Department
Física Aplicada
Source
Remote Sens. 2021, 13(1), 150
Abstract
Measuring the nearshore bathymetry is critical in coastal management and morphodynamic studies. The recent advent of Unmanned Aerial Vehicles (UAVs), in combination with coastal video monitoring techniques, allows for an alternative and low cost evaluation of the nearshore bathymetry. Camera calibration and stabilization is a critical issue in bathymetry estimation from video systems. This work introduces a new methodology in order to obtain such bathymetries, and it compares the results to echo-sounder ground truth data. The goal is to gain a better understanding on the influence of the camera calibration and stabilization on the inferred bathymetry. The results show how the proposed methodology allows for accurate evaluations of the bathymetry, with overall root mean square errors in the order of 40 cm. It is shown that the intrinsic calibration of the camera, related to the lens distortion, is the most critical aspect. Here, the intrinsic calibration that was obtained directly during the flight yields the best results.
Subjects
Unmanned Aerial Vehicles (UAVs); camera calibration; bathymetry estimation; coastal morphodynamics; coastal management
Collections
  • Artículos Científicos [4849]
  • Articulos Científicos Fis. Ap. [111]
  • Investigación Ceimar [121]
Atribución 4.0 Internacional
This work is under a Creative Commons License Atribución 4.0 Internacional

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