Details
Name
António José OliveiraCluster
Networked Intelligent SystemsRole
Research AssistantSince
10th September 2020
Nationality
PortugalCentre
Robotics and Autonomous SystemsContacts
+351222094000
antonio.j.oliveira@inesctec.pt
2022
Authors
Oliveira, AJ; Ferreira, BM; Diamant, R; Cruz, NA;
Publication
2022 IEEE/OES Autonomous Underwater Vehicles Symposium, AUV 2022
Abstract
In-situ calibration of marine sensors requires close-range positioning. In turn, localization relative to a given object of interest is necessary. This paper deals with the detection of a vertical cable hanging from a marine observatory implemented by means of a moored buoy. An algorithm composed of sequential image filtering, segmentation and template matching is proposed. Two approaches for generating the cable's acoustic image template are introduced. The performance of the approaches, obtained by comparison with ground-truth measurements, are illustrated over challenging cluttered acoustic images collected in a test tank. The results indicate a performance better than 74% of the best candidate to match the actual cable. © 2022 IEEE.
2022
Authors
Oliveira, AJ; Ferreira, BM; Cruz, NA;
Publication
Oceans Conference Record (IEEE)
Abstract
Wall and other planar structures are common in environments as harbors, marinas, or dams. In this paper we introduce an algorithm aimed at the identification of these structures through acoustic images retrieved from an imaging sonar, building on an application of the Hough Transform algorithm. We employ a polar-based line parametric model for improved computational efficiency and further adapt the core Hough Transform blocks to the characteristics of acoustic imaging. The developed solution was subjected to experimental tests employing acoustic data acquired in a water tank, from different viewpoints and under different sonar gain configurations. © 2022 IEEE.
2021
Authors
Oliveira, AJ; Ferreira, BM; Cruz, NA;
Publication
JOURNAL OF MARINE SCIENCE AND ENGINEERING
Abstract
2021
Authors
Oliveira, AJ; Ferreira, BM; Cruz, NA;
Publication
OCEANS 2021: San Diego – Porto
Abstract
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