| 1. |
- Figuero, Andres, et al.
(författare)
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Dynamical study of a moored vessel using computer vision
- 2018
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Ingår i: Journal of Marine Science and Technology. - : NATL TAIWAN OCEAN UNIV. - 0948-4280 .- 1437-8213. ; 26:2, s. 240-250
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Tidskriftsartikel (refereegranskat)abstract
- Wind and wave effects have a major impact on the design of mooring and anchoring systems, whose purpose is to prevent the movement of the cargo and the moored ship while optimizing the operations which have to take place in port. The dynamic behavior of a ship moored in waves has been mathematically described and interactions between ships and environmental loads have been commonly tested for different docks and mooring systems in scale models. However, the behavior of real ships in true mooring conditions has not been properly addressed in scientific literature. This paper proposes a novel computer vision technique to monitor moored ships. This approach uses the correlation of visual features in the images of the ship to estimate its movements along time. The proposed technique has been validated in laboratory conditions and applied in a real scenario to study the behavior of the ship Urania Mella in the Outer Port of A Coruna (Spain), in Punta Langosteira, obtaining very promising results.
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| 2. |
- Figuero, Andrés, et al.
(författare)
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Field measurements of angular motions of a vessel at berth : Inertial device application
- 2018
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Ingår i: Control Engineering and Applied Informatics. - : Romanian Soc Control Tech Informatics. - 1454-8658. ; 20:3, s. 79-88
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Tidskriftsartikel (refereegranskat)abstract
- The study and characterization of the oscillations of a moored vessel has a major importance in port operational efficiency, not only in the design of mooring and anchoring systems, but also in order to prevent the movement of the cargo, minimize ship and dock damage and optimizing the operations which have to take place while the ship is moored.The dynamic behavior of a vessel moored in waves has been mathematically described and interactions between ships and environmental loads such as waves, wind, currents and ice are commonly tested for different docks and mooring systems in scale models. However, field data studies of the behavior moored ships have not been properly addressed so far.This paper proposes a novel application of Inertial Measurement Units to estimate the angular movements (roll, pitch and yaw) of a moored vessel. The proposed technique has been validated in laboratory conditions and the behavior of the ship Urania Mella in the Outer Port of Punta Langosteira (A Coruña, Spain), has been analyzed, obtaining very promising results.
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| 3. |
- Rodriguez, Alvaro, et al.
(författare)
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Fish tracking with computer vision techniques : an application to vertical slot fishways
- 2016
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Ingår i: Multi-core computer vision and image processing for intelligent applications. - : IGI Global. - 9781522508908 - 1522508899 - 9781522508892 ; , s. 74-104
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- Vertical slot fishways are hydraulic structures which allow the upstream migration of fish through obstructions in rivers. Their design depends on the interplay between hydraulic and biological variables to match the requirements of the fish species for which they are intended. However, current mechanisms to study fish behavior in fishway models are impractical or unduly affect the animal behavior. In this chapter, we propose a new procedure for measuring fish behavior in fishways using Computer Vision (CV) techniques to analyze images obtained from the assays by means of a camera system designed for fishway integration. It is expected that this technique will provide detailed information about the fish behavior and will help to improve fish passage devices. A series of assays have been performed in order to validate this new approach in a full-scale fishway model and with living fishes. We have obtained very promising results that allow reconstructing correctly the movements of the fish within the fishway without disturbing fish.
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