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Comprehensive Detection of Gas Plumes from Multibeam Water Column Images with Minimisation of Noise Interferences

Multibeam echosounder systems (MBES) can record backscatter strengths of gas plumes in the water column (WC) images that may be an indicator of possible occurrence of gas at certain depths. Manual or automatic detection is generally adopted in finding gas plumes, but frequently results in low effici...

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Detalles Bibliográficos
Autores principales: Zhao, Jianhu, Meng, Junxia, Zhang, Hongmei, Wang, Shiqi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5751054/
https://www.ncbi.nlm.nih.gov/pubmed/29186014
http://dx.doi.org/10.3390/s17122755
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author Zhao, Jianhu
Meng, Junxia
Zhang, Hongmei
Wang, Shiqi
author_facet Zhao, Jianhu
Meng, Junxia
Zhang, Hongmei
Wang, Shiqi
author_sort Zhao, Jianhu
collection PubMed
description Multibeam echosounder systems (MBES) can record backscatter strengths of gas plumes in the water column (WC) images that may be an indicator of possible occurrence of gas at certain depths. Manual or automatic detection is generally adopted in finding gas plumes, but frequently results in low efficiency and high false detection rates because of WC images that are polluted by noise. To improve the efficiency and reliability of the detection, a comprehensive detection method is proposed in this paper. In the proposed method, the characteristics of WC background noise are first analyzed and given. Then, the mean standard deviation threshold segmentations are respectively used for the denoising of time-angle and depth-angle images, an intersection operation is performed for the two segmented images to further weaken noise in the WC data, and the gas plumes in the WC data are detected from the intersection image by the morphological constraint. The proposed method was tested by conducting shallow-water and deepwater experiments. In these experiments, the detections were conducted automatically and higher correct detection rates than the traditional methods were achieved. The performance of the proposed method is analyzed and discussed.
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spelling pubmed-57510542018-01-10 Comprehensive Detection of Gas Plumes from Multibeam Water Column Images with Minimisation of Noise Interferences Zhao, Jianhu Meng, Junxia Zhang, Hongmei Wang, Shiqi Sensors (Basel) Article Multibeam echosounder systems (MBES) can record backscatter strengths of gas plumes in the water column (WC) images that may be an indicator of possible occurrence of gas at certain depths. Manual or automatic detection is generally adopted in finding gas plumes, but frequently results in low efficiency and high false detection rates because of WC images that are polluted by noise. To improve the efficiency and reliability of the detection, a comprehensive detection method is proposed in this paper. In the proposed method, the characteristics of WC background noise are first analyzed and given. Then, the mean standard deviation threshold segmentations are respectively used for the denoising of time-angle and depth-angle images, an intersection operation is performed for the two segmented images to further weaken noise in the WC data, and the gas plumes in the WC data are detected from the intersection image by the morphological constraint. The proposed method was tested by conducting shallow-water and deepwater experiments. In these experiments, the detections were conducted automatically and higher correct detection rates than the traditional methods were achieved. The performance of the proposed method is analyzed and discussed. MDPI 2017-11-29 /pmc/articles/PMC5751054/ /pubmed/29186014 http://dx.doi.org/10.3390/s17122755 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhao, Jianhu
Meng, Junxia
Zhang, Hongmei
Wang, Shiqi
Comprehensive Detection of Gas Plumes from Multibeam Water Column Images with Minimisation of Noise Interferences
title Comprehensive Detection of Gas Plumes from Multibeam Water Column Images with Minimisation of Noise Interferences
title_full Comprehensive Detection of Gas Plumes from Multibeam Water Column Images with Minimisation of Noise Interferences
title_fullStr Comprehensive Detection of Gas Plumes from Multibeam Water Column Images with Minimisation of Noise Interferences
title_full_unstemmed Comprehensive Detection of Gas Plumes from Multibeam Water Column Images with Minimisation of Noise Interferences
title_short Comprehensive Detection of Gas Plumes from Multibeam Water Column Images with Minimisation of Noise Interferences
title_sort comprehensive detection of gas plumes from multibeam water column images with minimisation of noise interferences
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5751054/
https://www.ncbi.nlm.nih.gov/pubmed/29186014
http://dx.doi.org/10.3390/s17122755
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