Pub Date : 2014-10-13DOI: 10.1109/SSCO.2014.7000373
J. Bonnel, A. Thode
Bowhead whales generate low-frequency vocalizations in shallow-water Arctic environments. The propagation of these sounds is adequately described by normal mode theory. Indeed, at low-frequency the environment acts as a dispersive waveguide. The propagated signal can be modeled by a sum of normal modes, and the source position can be inferred from the different modal arrivals. However, this requires to estimate the modes from the received signal. Traditionally, modal arrivals are separated using synchronized hydrophone arrays. Here a nonlinear signal processing method called warping is used to filter the modes on just a single hydrophone. Once modes are filtered, the source depth and range can be estimated using classical Matched Mode Processing. This methodology is illustrated on an experimental bowhead whale vocalization recorded in the Beaufort Sea. Because seabed properties are not well known, it is necessary to jointly perform source localization and geacoustic inversion.
{"title":"Range and depth estimation of bowhead whale calls in the Arctic using a single hydrophone","authors":"J. Bonnel, A. Thode","doi":"10.1109/SSCO.2014.7000373","DOIUrl":"https://doi.org/10.1109/SSCO.2014.7000373","url":null,"abstract":"Bowhead whales generate low-frequency vocalizations in shallow-water Arctic environments. The propagation of these sounds is adequately described by normal mode theory. Indeed, at low-frequency the environment acts as a dispersive waveguide. The propagated signal can be modeled by a sum of normal modes, and the source position can be inferred from the different modal arrivals. However, this requires to estimate the modes from the received signal. Traditionally, modal arrivals are separated using synchronized hydrophone arrays. Here a nonlinear signal processing method called warping is used to filter the modes on just a single hydrophone. Once modes are filtered, the source depth and range can be estimated using classical Matched Mode Processing. This methodology is illustrated on an experimental bowhead whale vocalization recorded in the Beaufort Sea. Because seabed properties are not well known, it is necessary to jointly perform source localization and geacoustic inversion.","PeriodicalId":345550,"journal":{"name":"2014 IEEE Sensor Systems for a Changing Ocean (SSCO).","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116871717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-13DOI: 10.1109/SSCO.2014.7000374
G. B. Kinda, J. Bonnel
During long term passive acoustic monitoring in shallow water in Iroise Sea, the time series of the ambient noise recorded with a single hydrophone showed some unusual striations in the time-frequency domain. The changes in the striation slopes are related to the tidal oscillations, which induce a change in the water depth of the waveguide. The observed striations are highly correlated with the tides, and this phenomenon is classically described by a simple scalar γ called the depth-frequency waveguide invariant. However, the observed invariant γobs ≃ -1 differs from the canonical γ = -2 value. A theoretical approach is developed to explain the observed γobs, and particularly its dependence on the bathymetry in a range-dependent environment.
{"title":"Passive acoustic monitoring of coastal dynamical oceanographic phenomena using single hydrophone","authors":"G. B. Kinda, J. Bonnel","doi":"10.1109/SSCO.2014.7000374","DOIUrl":"https://doi.org/10.1109/SSCO.2014.7000374","url":null,"abstract":"During long term passive acoustic monitoring in shallow water in Iroise Sea, the time series of the ambient noise recorded with a single hydrophone showed some unusual striations in the time-frequency domain. The changes in the striation slopes are related to the tidal oscillations, which induce a change in the water depth of the waveguide. The observed striations are highly correlated with the tides, and this phenomenon is classically described by a simple scalar γ called the depth-frequency waveguide invariant. However, the observed invariant γobs ≃ -1 differs from the canonical γ = -2 value. A theoretical approach is developed to explain the observed γobs, and particularly its dependence on the bathymetry in a range-dependent environment.","PeriodicalId":345550,"journal":{"name":"2014 IEEE Sensor Systems for a Changing Ocean (SSCO).","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127951316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01DOI: 10.1109/SSCO.2014.7000386
I. Masmitja, J. del Río, J. D. de Damborenea, A. Conde
Corrosion due to seawater studies are urgently required for a safe technology development. Some studies demonstrated that the corrosion rates for most alloys could be four times less than surface corrosion rates. A device for continuous electrochemical measuring of corrosion in real time and underwater is shown in this paper. Therefore, this equipment allows improving the knowledge about long-term materials behavior in this aggressive environment for the scientific community. Also, it has been designed to allow the connection to underwater observatories such as OBSEA.
{"title":"Underwater potentiostat for real-time electrochemical corrosion measurements","authors":"I. Masmitja, J. del Río, J. D. de Damborenea, A. Conde","doi":"10.1109/SSCO.2014.7000386","DOIUrl":"https://doi.org/10.1109/SSCO.2014.7000386","url":null,"abstract":"Corrosion due to seawater studies are urgently required for a safe technology development. Some studies demonstrated that the corrosion rates for most alloys could be four times less than surface corrosion rates. A device for continuous electrochemical measuring of corrosion in real time and underwater is shown in this paper. Therefore, this equipment allows improving the knowledge about long-term materials behavior in this aggressive environment for the scientific community. Also, it has been designed to allow the connection to underwater observatories such as OBSEA.","PeriodicalId":345550,"journal":{"name":"2014 IEEE Sensor Systems for a Changing Ocean (SSCO).","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123612392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01DOI: 10.1109/SSCO.2014.7000369
J. Gille, Linette de Swart, I. Giannelos, E. Delory, A. Castro
This market analysis is based on the work performed for the EU/FP7 project NeXOS that focuses on preparing the new generation of multi-functional maritime sensors. Naturally, such a venture cannot be successful without a prior thorough assessment of the market status and an in depth understanding of the user needs and the upcoming market trends. Therefore the market assessment we have performed has the following objectives: · to map the current and upcoming applications of maritime sensors in the various fields of implementation · to create a solid understanding of the structure of the market for maritime sensors; · to draw the sector's value chain indicating the activities that produce added value to maritime sensor activities; · to assess the competitiveness of the European maritime sensor industry; and · to identify the trends for the future development of the respective market segments as well as the barriers for further development of the market; The main focus of the study is to assess the market for optic sensors, passive acoustic sensors and the Ecosystem Approach to Fisheries (EAF) sensor system. These maritime sensors have been identified to be applied or have potential application in a big variety of activities ranging from environmental monitoring and climate change research to seismic research and marine mammals. The value chain of the market has been drawn to depict the distinct activities that add value to maritime observation activities. The activities on the main branch of the value chain include sensor manufacturing, sensor developing and integrating into platforms as well as adapting the sensors to the needs of the maritime observations, operating them, analysing the collected data and exploiting the results of the observations. Currently there is no clear distinction of activities performed by each stakeholder group resulting in varying perceptions of the range of value-adding activities that different stakeholders focus on. However a set of main stakeholder groups with more or less distinct behaviour has been identified and includes: i) sensor manufacturers; ii) sensor developers; iii) service providers and iv) end-users of environmental monitoring services. In our research, we have identified the main and most promising market segments for maritime sensor activities and distinguished 3 perspectives of sensor use that actually drive the user requirements for sensors. These perspectives are: i) research, ii) industry and iii) research and development. In this study we dive into the growth expectations of the different market segments beyond the traditional, long-standing markets of Europe and N America looking into the developments on a global scale. As far as competitiveness of the sector is concerned, the European sensor market position in the world is assessed compared to the ongoing strong by the N. American sector and a SWOT analysis is performed to highlight the strengths, weaknesses, opportunities and threats for the Eu
{"title":"Marine sensors; the market, the trends and the value chain","authors":"J. Gille, Linette de Swart, I. Giannelos, E. Delory, A. Castro","doi":"10.1109/SSCO.2014.7000369","DOIUrl":"https://doi.org/10.1109/SSCO.2014.7000369","url":null,"abstract":"This market analysis is based on the work performed for the EU/FP7 project NeXOS that focuses on preparing the new generation of multi-functional maritime sensors. Naturally, such a venture cannot be successful without a prior thorough assessment of the market status and an in depth understanding of the user needs and the upcoming market trends. Therefore the market assessment we have performed has the following objectives: · to map the current and upcoming applications of maritime sensors in the various fields of implementation · to create a solid understanding of the structure of the market for maritime sensors; · to draw the sector's value chain indicating the activities that produce added value to maritime sensor activities; · to assess the competitiveness of the European maritime sensor industry; and · to identify the trends for the future development of the respective market segments as well as the barriers for further development of the market; The main focus of the study is to assess the market for optic sensors, passive acoustic sensors and the Ecosystem Approach to Fisheries (EAF) sensor system. These maritime sensors have been identified to be applied or have potential application in a big variety of activities ranging from environmental monitoring and climate change research to seismic research and marine mammals. The value chain of the market has been drawn to depict the distinct activities that add value to maritime observation activities. The activities on the main branch of the value chain include sensor manufacturing, sensor developing and integrating into platforms as well as adapting the sensors to the needs of the maritime observations, operating them, analysing the collected data and exploiting the results of the observations. Currently there is no clear distinction of activities performed by each stakeholder group resulting in varying perceptions of the range of value-adding activities that different stakeholders focus on. However a set of main stakeholder groups with more or less distinct behaviour has been identified and includes: i) sensor manufacturers; ii) sensor developers; iii) service providers and iv) end-users of environmental monitoring services. In our research, we have identified the main and most promising market segments for maritime sensor activities and distinguished 3 perspectives of sensor use that actually drive the user requirements for sensors. These perspectives are: i) research, ii) industry and iii) research and development. In this study we dive into the growth expectations of the different market segments beyond the traditional, long-standing markets of Europe and N America looking into the developments on a global scale. As far as competitiveness of the sector is concerned, the European sensor market position in the world is assessed compared to the ongoing strong by the N. American sector and a SWOT analysis is performed to highlight the strengths, weaknesses, opportunities and threats for the Eu","PeriodicalId":345550,"journal":{"name":"2014 IEEE Sensor Systems for a Changing Ocean (SSCO).","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126492509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01DOI: 10.1109/SSCO.2014.7000379
Maria Yasri, R. Khalifeh, B. Lescop, F. Gallée, E. Diler, D. Thierry, S. Rioual
Wireless and fully energetically passive corrosion sensors are presented for the monitoring of degradation of infrastructures located in coastal zones and marine environments. Their application concerns thus marine offshore, wind energy industry as well as harbor maintenance procedures. Several sensitive parts and architectures will be presented at the conferences. In this paper, an example of such sensor is provided.
{"title":"Development of environmental sensors for monitoring of corrosion in marine offshore and wind energy industries","authors":"Maria Yasri, R. Khalifeh, B. Lescop, F. Gallée, E. Diler, D. Thierry, S. Rioual","doi":"10.1109/SSCO.2014.7000379","DOIUrl":"https://doi.org/10.1109/SSCO.2014.7000379","url":null,"abstract":"Wireless and fully energetically passive corrosion sensors are presented for the monitoring of degradation of infrastructures located in coastal zones and marine environments. Their application concerns thus marine offshore, wind energy industry as well as harbor maintenance procedures. Several sensitive parts and architectures will be presented at the conferences. In this paper, an example of such sensor is provided.","PeriodicalId":345550,"journal":{"name":"2014 IEEE Sensor Systems for a Changing Ocean (SSCO).","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133375267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01DOI: 10.1109/SSCO.2014.7000387
Donal Kennedy, M. Walsh, B. O’flynn
Although commercial wave buoys are the de facto standard for ocean wave measurement, and are highly accurate and reliable, their high cost of deployment and maintenance can render them impractical for many applications. This paper describes the measurement of simulated sea states in a wave tank using Tyndall Wireless Inertial Measurement Units (WIMUs). These inertial measurement units are miniature devices which combine a microcontroller, wireless communication capability, and solidstate MEMS sensors (accelerometer, gyroscope and magnetometer) with specialized algorithms for specific analytical tasks. Methods and results are described here for measurement of simulated sea states. These tests represent a range of wave heights and periods from which the performance of the system may be quantified. Wave height is measured with an accuracy of -3% ±5%, with period measured at 1% ±7%. These results are shown to be significantly better than those achieved using methods in the currently available literature.
{"title":"Low-cost inertial measurement of ocean waves","authors":"Donal Kennedy, M. Walsh, B. O’flynn","doi":"10.1109/SSCO.2014.7000387","DOIUrl":"https://doi.org/10.1109/SSCO.2014.7000387","url":null,"abstract":"Although commercial wave buoys are the de facto standard for ocean wave measurement, and are highly accurate and reliable, their high cost of deployment and maintenance can render them impractical for many applications. This paper describes the measurement of simulated sea states in a wave tank using Tyndall Wireless Inertial Measurement Units (WIMUs). These inertial measurement units are miniature devices which combine a microcontroller, wireless communication capability, and solidstate MEMS sensors (accelerometer, gyroscope and magnetometer) with specialized algorithms for specific analytical tasks. Methods and results are described here for measurement of simulated sea states. These tests represent a range of wave heights and periods from which the performance of the system may be quantified. Wave height is measured with an accuracy of -3% ±5%, with period measured at 1% ±7%. These results are shown to be significantly better than those achieved using methods in the currently available literature.","PeriodicalId":345550,"journal":{"name":"2014 IEEE Sensor Systems for a Changing Ocean (SSCO).","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126909872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01DOI: 10.1109/SSCO.2014.7000372
Y. Auffret, P. Bouvet, A. Loussert, Laure Amate, Didier Munck
Sea Test Base / Celadon is a non-profit organization, which offers testing facilities mainly based on a coastal non-cabled observatory, dedicated for designing, testing and qualifying marine sensors and marine instruments in real conditions. This platform can be considered as an experimental laboratory at sea, available 24/7/365 from the Internet. In a first step, we describe, analyse and compare the differences in terms of architecture and services between conventional marine cabled, non-cabled observatories and Sea Test Base facilities. In a second step, we present the results obtained with this platform to design, improve and qualify the hardware and the algorithms for a Multiple-Input and Multiple-Output (MIMO) modem for underwater acoustic communication. In conclusion, we present the upcoming extension of Sea Test Base, which consists of a shared open platform based on a mesh network including buoys and a pontoon, dedicated to underwater acoustic experiments at sea.
Sea Test Base / Celadon是一个非营利性组织，主要提供基于沿海非电缆天文台的测试设施，致力于在实际条件下设计，测试和鉴定海洋传感器和海洋仪器。这个平台可以看作是海上的实验实验室，可以从互联网上24/7/365全天候使用。首先，我们描述、分析和比较了传统海洋电缆、非电缆观测站和海上试验基地设施在架构和服务方面的差异。在第二步中，我们给出了利用该平台设计、改进和验证用于水声通信的多输入多输出(MIMO)调制解调器的硬件和算法的结果。总之，我们提出了即将进行的海上试验基地扩建，该基地由一个基于包括浮标和浮筒在内的网状网络的共享开放平台组成，专门用于海上水声实验。
{"title":"Coastal observatory as a development platform for marine instrumentation","authors":"Y. Auffret, P. Bouvet, A. Loussert, Laure Amate, Didier Munck","doi":"10.1109/SSCO.2014.7000372","DOIUrl":"https://doi.org/10.1109/SSCO.2014.7000372","url":null,"abstract":"Sea Test Base / Celadon is a non-profit organization, which offers testing facilities mainly based on a coastal non-cabled observatory, dedicated for designing, testing and qualifying marine sensors and marine instruments in real conditions. This platform can be considered as an experimental laboratory at sea, available 24/7/365 from the Internet. In a first step, we describe, analyse and compare the differences in terms of architecture and services between conventional marine cabled, non-cabled observatories and Sea Test Base facilities. In a second step, we present the results obtained with this platform to design, improve and qualify the hardware and the algorithms for a Multiple-Input and Multiple-Output (MIMO) modem for underwater acoustic communication. In conclusion, we present the upcoming extension of Sea Test Base, which consists of a shared open platform based on a mesh network including buoys and a pontoon, dedicated to underwater acoustic experiments at sea.","PeriodicalId":345550,"journal":{"name":"2014 IEEE Sensor Systems for a Changing Ocean (SSCO).","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132832114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01DOI: 10.1109/SSCO.2014.7000365
S. Jirka, Daniel Mihai Toma, J. del Río, E. Delory
This paper introduces the Sensor Web architecture of the NeXOS project as example how interoperable standards help, to facilitate the creation of an infrastructure for sharing oceanographic observation data and the integration of sensor data into applications. Important technological foundations of the NeXOS Sensor Web architecture are the concepts of spatial data infrastructures and the Sensor Web Enablement framework of the Open Geospatial Consortium. As a result an architecture concept has been developed, which is introduced in this paper.
{"title":"A Sensor Web architecture for sharing oceanographic sensor data","authors":"S. Jirka, Daniel Mihai Toma, J. del Río, E. Delory","doi":"10.1109/SSCO.2014.7000365","DOIUrl":"https://doi.org/10.1109/SSCO.2014.7000365","url":null,"abstract":"This paper introduces the Sensor Web architecture of the NeXOS project as example how interoperable standards help, to facilitate the creation of an infrastructure for sharing oceanographic observation data and the integration of sensor data into applications. Important technological foundations of the NeXOS Sensor Web architecture are the concepts of spatial data infrastructures and the Sensor Web Enablement framework of the Open Geospatial Consortium. As a result an architecture concept has been developed, which is introduced in this paper.","PeriodicalId":345550,"journal":{"name":"2014 IEEE Sensor Systems for a Changing Ocean (SSCO).","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114265550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01DOI: 10.1109/SSCO.2014.7000385
Gloria Makhoul, F. Le Pennec
In the context of future seabed underwater scientific observatories, a new Wi-Fi antenna (at 2.45 GHz) was recently developed for high data rate and short range wireless underwater applications [1]. It supports real time video and rapid large file transmissions (54 Mb/s during experiments). Also its simplicity and compatibility with standard Wi-Fi equipment (modems, etc.) makes it a low cost solution for underwater applications.
{"title":"Optimization of a Wi-Fi radio antenna for underwater applications","authors":"Gloria Makhoul, F. Le Pennec","doi":"10.1109/SSCO.2014.7000385","DOIUrl":"https://doi.org/10.1109/SSCO.2014.7000385","url":null,"abstract":"In the context of future seabed underwater scientific observatories, a new Wi-Fi antenna (at 2.45 GHz) was recently developed for high data rate and short range wireless underwater applications [1]. It supports real time video and rapid large file transmissions (54 Mb/s during experiments). Also its simplicity and compatibility with standard Wi-Fi equipment (modems, etc.) makes it a low cost solution for underwater applications.","PeriodicalId":345550,"journal":{"name":"2014 IEEE Sensor Systems for a Changing Ocean (SSCO).","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134313434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-10-01DOI: 10.1109/SSCO.2014.7000371
E. Tusa, Alan Reynolds, D. Lane, N. Robertson, H. Villegas, A. Bosnjak
The task of reef restoration is very challenging for volunteer SCUBA divers, if it has to be carried out at deep sea, 200 meters, and low temperatures. This kind of task can be properly performed by an Autonomous Underwater Vehicle (AUV); able to detect the location of reef areas and approach them. The aim of this study is the development of a vision system for coral detections based on supervised machine learning. In order to achieve this, we use a bank of Gabor Wavelet filters to extract texture feature descriptors, we use learning classifiers, from OpenCV library, to discriminate coral from non-coral reef. We compare: running time, accuracy, specificity and sensitivity of nine different learning classifiers. We select Decision Trees algorithm because it shows the fastest and the most accurate performance. For the evaluation of this system, we use a database of 621 images (developed for this purpose), that represents the coral reef located in Belize: 110 for training the classifiers and 511 for testing the coral detector.
{"title":"Implementation of a fast coral detector using a supervised machine learning and Gabor Wavelet feature descriptors","authors":"E. Tusa, Alan Reynolds, D. Lane, N. Robertson, H. Villegas, A. Bosnjak","doi":"10.1109/SSCO.2014.7000371","DOIUrl":"https://doi.org/10.1109/SSCO.2014.7000371","url":null,"abstract":"The task of reef restoration is very challenging for volunteer SCUBA divers, if it has to be carried out at deep sea, 200 meters, and low temperatures. This kind of task can be properly performed by an Autonomous Underwater Vehicle (AUV); able to detect the location of reef areas and approach them. The aim of this study is the development of a vision system for coral detections based on supervised machine learning. In order to achieve this, we use a bank of Gabor Wavelet filters to extract texture feature descriptors, we use learning classifiers, from OpenCV library, to discriminate coral from non-coral reef. We compare: running time, accuracy, specificity and sensitivity of nine different learning classifiers. We select Decision Trees algorithm because it shows the fastest and the most accurate performance. For the evaluation of this system, we use a database of 621 images (developed for this purpose), that represents the coral reef located in Belize: 110 for training the classifiers and 511 for testing the coral detector.","PeriodicalId":345550,"journal":{"name":"2014 IEEE Sensor Systems for a Changing Ocean (SSCO).","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133522844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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