Results 201 to 210 of about 50,747 (268)

Acoustic Assessment of Polymetallic Nodule Abundance Using Sidescan Sonar and Altimeter

IEEE Journal of Oceanic Engineering, 2020
Polymetallic nodules (PMN) are potato-sized concretions containing metals, such as manganese, copper, nickel, cobalt, and rare earth elements, and are a potential valuable resource of minerals.
Liang Jie Wong, B. Kalyan, M. Chitre, H. Vishnu   +3 more
semanticscholar   +1 more source

CGF-Unet: Semantic Segmentation of Sidescan Sonar Based on Unet Combined With Global Features

IEEE Journal of Oceanic Engineering
In the realm of oceanic exploration, sidescan sonar's significance is indisputable. However, the inherent challenges of low resolution and robust noise interference in sidescan sonar images have presented a formidable barrier to semantic segmentation in ...
Yushan Sun, Haotian Zheng, Guo-cheng Zhang, Jingfei Ren, Guoyang Shu   +4 more
semanticscholar   +1 more source

Landmark detection from sidescan sonar images

2017 IEEE Jordan Conference on Applied Electrical Engineering and Computing Technologies (AEECT), 2017
Sidescan sonars have seen wide deployment in underwater imaging. They can be used to image the seabed to a rather acceptable resolution from a few centimeters to 10 centimeters. Yet, sonar images are still of a substantially lower visual quality as they suffer from quite a few problems, e.g., acoustic shadows that vary according to vehicle heading and ...
Mohammed Al-Rawi, Adrian Galdran, Fredrik Elmgren, Jonathan Rodriguez, Joaquim Bastos, Marc Pinto   +5 more
openaire   +1 more source

Inertial Sidescan Sonar: Expanding Side Scan Sonar Processing by Leveraging Inertial Navigation Systems

Oceans
Synthetic aperture sonar (SAS) is emerging in the survey industry, but traditional side-scan sonar (SSS) remains the standard. Synthetic Aperture Mapping Sonar (SAMS) aims to combine the user-friendliness of SSS with the advanced capabilities of SAS ...
B. Marty, B. Chemisky, Didier Charlot
semanticscholar   +1 more source

Dealing With Highly Unbalanced Sidescan Sonar Image Datasets for Deep Learning Classification Tasks

Global Oceans 2020: Singapore – U.S. Gulf Coast, 2020
In this paper we compare several approaches to deal with the problem of unbalanced sidescan sonar datasets for classification tasks. Specifically, we consider the case where data from one class is very limited.
Yannik Steiniger, Jannis Stoppe, Tobias Meisen, D. Kraus   +3 more
semanticscholar   +1 more source

Wavelet denoising of sidescan sonar images

The Journal of the Acoustical Society of America, 2001
One important application of wavelet transforms is for noise removal or denoising. The effectiveness of this technique is influenced by the choice of wavelet used, the decomposition level, and the threshold (both amplitude and type). Thirty different wavelets, several allowable decomposition levels, and a range of appropriate thresholds are tested ...
Juliette W. Ioup, Marlin L. Gendron, Brian S. Bourgeois, George E. Ioup   +3 more
openaire   +1 more source

Deep towed sidescan sonars

Proceedings of OCEANS '93, 2002
The advantages of collecting seafloor imagery and bathymetry from a deep towed full ocean depth sidescan sonar system are becoming widely appreciated. The number of systems in active use in the scientific, government and commercial communities has more than doubled in the last five years.
openaire   +1 more source

New software for processing sidescan data from sidescan-capable multibeam sonars

'Challenges of Our Changing Global Environment'. Conference Proceedings. OCEANS '95 MTS/IEEE, 2002
The authors have developed new software tools for the processing and display of sidescan data obtained with the latest generation of multibeam sonars; these programs are distributed as part of the MB-System software package. The new utilities provide a straightforward means for several common processing tasks, including analyzing the drop in ...
D.W. Caress, D.N. Chayes
openaire   +1 more source

Motion compensation for improved sidescan sonar imaging

Proceedings of OCEANS '93, 2002
Sidescan sonar imaging systems are useful mapping tools in bathymetric mapping for geologic survey, subseabed interrogation for mineral prospecting, and search and recovery. Under ideal conditions, the sonar platform will maintain a uniform trajectory as it surveys the ocean floor.
B.L. Douglas, null Hua Lee
openaire   +1 more source

Deep towed sidescan sonar systems

OCEANS 2010 MTS/IEEE SEATTLE, 2010
The advantages of collecting seafloor imagery, bathymetry and subbottom profiler data from 6000 meter rated deep-towed sidescan sonar systems has been appreciated for many years. The number of systems in active use in the commercial, scientific, and government communities continues to increase.
openaire   +1 more source