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Minelli, Annalisa; Tassetti, Anna Nora; Hutton, Briony; Pezzuti Cozzolino, Gerardo N; Jarvis, Toby; Fabi, Gianna
Sensors (Basel, Switzerland), 04/2021, Letnik: 21, Številka: 9Journal Article
Multibeam echosounders are widely used for 3D bathymetric mapping, and increasingly for water column studies. However, they rapidly collect huge volumes of data, which poses a challenge for water column data processing that is often still manual and time-consuming, or affected by low efficiency and high false detection rates if automated. This research describes a comprehensive and reproducible workflow that improves efficiency and reliability of target detection and classification, by calculating metrics for target cross-sections using a commercial software before feeding into a feature-based semi-supervised machine learning framework. The method is tested with data collected from an uncalibrated multibeam echosounder around an offshore gas platform in the Adriatic Sea. It resulted in more-efficient target detection, and, although uncertainties regarding user labelled training data need to be underlined, an accuracy of 98% in target classification was reached by using a final pre-trained stacking ensemble model.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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