scholarly journals Sensor-assisted video mosaicing for seafloor mapping

Author(s):  
Y. Rzhanov ◽  
G.R. Cutter ◽  
L. Huff
Author(s):  
E. Hammerstad ◽  
A. Lovik ◽  
S. Minde ◽  
L. Krane ◽  
M. Steinset

2019 ◽  
Vol 119 ◽  
pp. 171-183 ◽  
Author(s):  
Yan Li ◽  
Carly J. Randall ◽  
Robert van Woesik ◽  
Eraldo Ribeiro

Eos ◽  
2015 ◽  
Vol 96 ◽  
Author(s):  
Christopher Kelley ◽  
John Smith ◽  
Joyce Miller ◽  
Jonathan Tree ◽  
Brian Boston ◽  
...  

New surveys help untangle the complex geologic history of the Hawaiian Archipelago and provide hints about where to seek marine life.


Author(s):  
P. Mertikas ◽  
K. Karantzalos

Abstract. Recent technological advances in the underwater sensing instrumentation provide currently active multibeam echosounders that can acquire backscatter observations from multiple spectral frequencies. In this paper, the main objective was to design, develop and validate an efficient and robust multispectral, multibeam data processing framework including advanced machine learning tools for seabed classification. In order to do so, we have integrated different machine learning tools like support vector machines and random forests towards the classification of seabed classes. We have performed extensive experiments with different splitting ratios, regarding training and testing sets, in order to assess possible overfitting. The entire pipeline has been implemented in a scalable containerized manner in order to be deployed in cloud infrastructures and more specifically at the European Open Science Cloud. Experimental results, the performed qualitative and quantitative evaluation along with the comparison with the state of the art indicated the quite promising potential of our approach.


2013 ◽  
Vol 4 (2) ◽  
pp. 120-137 ◽  
Author(s):  
Manuel Meidinger ◽  
Markantonatou Vasiliki ◽  
Marcello Sano ◽  
Marco Palma ◽  
Massimo Ponti

2018 ◽  
Vol 47 (3) ◽  
pp. 248-259 ◽  
Author(s):  
Łukasz Janowski ◽  
Jarosław Tęgowski ◽  
Jarosław Nowak

Abstract Seafloor mapping is a fast developing multidisciplinary branch of oceanology that combines geophysics, geostatistics, sedimentology and ecology. One of its objectives is to isolate distinct seabed features in a repeatable, fast and objective way, taking into consideration multibeam echosounder (MBES) bathymetry and backscatter data. A large-scale acoustic survey was conducted by the Maritime Institute in Gdańsk in 2010 using Reson 8125 MBES. The dataset covered over 20 km2 of a shallow seabed area (depth of up to 22 m) in the Polish Exclusive Economic Zone within the Southern Baltic. Determination of sediments was possible based on ground-truth grab samples acquired during the MBES survey. Four classes of sediments were recognized as muddy sand, very fine sand, fine sand and clay. The backscatter mosaic created using the Angular Variable Gain (AVG) empirical method was the primary contribution to the image processing method used in this study. The use of the Object-Based Image Analysis (OBIA) and the Classification and Regression Trees (CART) classifier makes it possible to isolate the backscatter image with 87.5% overall and 81.0% Kappa accuracy. The obtained results confirm the possibility of creating reliable maps of the seafloor based on MBES measurements. Once developed, the OBIA workflow can be applied to other spatial and temporal scenes.


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