Results 41 to 50 of about 11,277,587 (243)
A Track Initiation Method Based on Multiple Accumulation of Active Sonar Images
水下无人系统学报, 2023 To meet the requirements of autonomous detection of underwater moving targets in a strong reverberation background, a track initiation algorithm based on multiple accumulations of active sonar images was proposed to solve the problem of large amounts of ...
Kai WANG, Junsheng JIAO
doaj +1 more source
The effects of sound propagation and avoidance behaviour on naval sonar levels received by cetaceans [PDF]
, 2012 The use of active sonar is deemed to be essential for naval operations, but its potential impact on marine life has raised concerns worldwide. In a risk-assessment framework, characterisation of risk of harm is accomplished by combining exposure ...
Wensveen, Paul J.
core +2 more sources
Journal of Marine Science and EngineeringThere are many challenges in using side-scan sonar (SSS) images to detect objects. The challenge of object detection and recognition in sonar data is greater than in optical images due to the sparsity of detectable targets.
Jier Xi, Xiufen Ye
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On the Information Advantage of Sidescan Sonar Three-Frequency Colour over Greyscale Imagery
Journal of Marine Science and Engineering, 2019 A prototype three-frequency (114, 256, and 410 kHz) colour sidescan sonar system, built by Kongsberg Underwater Mapping Ltd. (Great Yarmouth, UK), was previously described, and preliminary results presented, in Tamsett, McIlvenny, and Watts.
Duncan Tamsett +4 more
doaj +1 more source
Eyes on the water: How local mariners can accurately detect a submerged human proxy in shallow nearshore coastal water with modern recreational fish finders. [PDF]
J Forensic SciAbstract It has recently been demonstrated that modern recreational fish finders with high‐frequency (800 kHz) Sidescan transducers can detect submerged human bodies. This ubiquitous technology is widely used on the water and has the potential to be utilized for the rapid detection of submerged decedents in any waterbody.
Martlin BA, Bell LS.
europepmc +2 more sources
Designing Wire Mazes for Replicating Natural Echoes to Study Bat Biosonar Function
Advanced Intelligent Systems, EarlyView.A validated framework combining efficient physical modeling (multiple scattering model) and deep learning is presented to guide wire‐maze design for bat biosonar studies. This approach rapidly generates large datasets to test acoustic distinguishability among wire arrangements.
Chunlin Jia +3 more
wiley +1 more source
Sonar Image Detection Based on Multi-Scale Multi-Column Convolution Neural Networks
IEEE Access, 2019 Automatic detection of underwater objects by sonar images is an important and challenging topic in applications of Autonomous Underwater Vehicle (AUV) under the complex marine environment.
Zhen Wang, Shanwen Zhang
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Artificial Reef Detection Method for Multibeam Sonar Imagery Based on Convolutional Neural Networks
Remote Sensing, 2022 Artificial reef detection in multibeam sonar images is an important measure for the monitoring and assessment of biological resources in marine ranching.
Zhipeng Dong +5 more
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Archaeological Prospection, EarlyView.ABSTRACT Medieval and early modern drowned villages in the intertidal zone of the Scheldt estuary (the Netherlands) constitute intriguing yet largely understudied components of north‐western Europe's underwater cultural heritage. Despite their high archaeological potential as time capsules of past settlement landscapes, research has remained limited ...
Jan Trachet +9 more
wiley +1 more source
A Gray Scale Correction Method for Side-Scan Sonar Images Based on Retinex
Remote Sensing, 2019 When side-scan sonars collect data, sonar energy attenuation, the residual of time varying gain, beam patterns, angular responses, and sonar altitude variations occur, which lead to an uneven gray level in side-scan sonar images.
Xiufen Ye +4 more
doaj +1 more source