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   Articles with "sonar" as a keyword



Transmission of images by unmanned underwater vehicles

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recommendations! Published in 2020 at "Autonomous Robots"

DOI: 10.1007/s10514-019-09866-z

Abstract: As an acoustic communications medium, water is characterized by frequency dependent attenuation, short range, very low bandwidth, scattering, and multi-path. It is generally difficult to acoustically communicate even terse messages underwater much less images. For… read more here.

Keywords: underwater vehicles; methodology; unmanned underwater; sonar ... See more keywords

Feature Extraction in Fractional Fourier Domain for Classification of Passive Sonar Signals

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recommendations! Published in 2019 at "Journal of Signal Processing Systems"

DOI: 10.1007/s11265-018-1347-x

Abstract: The acoustic signals radiated from the marine vessels contain information about their machinery characteristics that can be useful for the detection and classification purposes. To achieve reliable accuracy in classification task, informative discriminant features should… read more here.

Keywords: feature extraction; passive sonar; sonar; classification ... See more keywords

Segmentation of sonar images with intensity inhomogeneity based on improved MRF

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recommendations! Published in 2020 at "Applied Acoustics"

DOI: 10.1016/j.apacoust.2019.107051

Abstract: Abstract Sonar is one of the most important tools for underwater object detection and submarine topography reconstruction. To classify sonar images automatically and accurately is essential for the navigation and path planning of autonomous underwater… read more here.

Keywords: intensity inhomogeneity; sonar; segmentation; images intensity ... See more keywords

Passive sonar automated target classifier for shallow waters using end-to-end learnable deep convolutional LSTMs

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recommendations! Published in 2021 at "Engineering Science and Technology, an International Journal"

DOI: 10.1016/j.jestch.2021.01.014

Abstract: Abstract Automated target recognition systems are increasingly employed in sonar systems to reduce manning and associated challenges. Although passive acoustic target recognition is an exceptionally challenging endeavor especially in shallow water scenarios, it is being… read more here.

Keywords: automated target; end end; sonar; classifier ... See more keywords
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Multiple Targets Detection of Linear Frequency-Modulated Continuous Wave Active Sonar Using Fractional Fourier Transform

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recommendations! Published in 2020 at "Integrated Ferroelectrics"

DOI: 10.1080/10584587.2020.1728798

Abstract: Abstract In order to improve the detection performance of active sonar and make up for the shortcomings of pulsed active sonar (PAS), linear frequency-modulated continuous wave (LFMCW) was applied in continuous active sonar (CAS). The… read more here.

Keywords: frequency modulated; sonar; linear frequency; modulated continuous ... See more keywords

Sonar image intelligent processing in seabed pipeline detection: review and application

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recommendations! Published in 2024 at "Measurement Science and Technology"

DOI: 10.1088/1361-6501/ad1919

Abstract: Subsea pipelines rely primarily on imaging sonar for detection and identification. We analyze the imaging principles of side scan sonar, multi-beam sonar, synthetic aperture sonar, seafloor penetrating sonar and forward-looking sonar. We discuss their effectiveness… read more here.

Keywords: detection; image intelligent; image; intelligent processing ... See more keywords

Behavior Modeling and Individual Recognition of Sonar Transmitter for Secure Communication in UASNs

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recommendations! Published in 2020 at "IEEE Access"

DOI: 10.1109/access.2019.2923059

Abstract: It is necessary to improve the safety of the underwater acoustic sensor networks (UASNs) since it is mostly used in the military industry. Specific emitter identification is the process of identifying different transmitters based on… read more here.

Keywords: sonar; communication; power; sonar transmitter ... See more keywords

GFHANet: Global Feature Hybrid Attention Network for Salient Object Detection in Side-Scan Sonar Images

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recommendations! Published in 2024 at "IEEE Access"

DOI: 10.1109/access.2024.3463804

Abstract: With the wide application of deep learning in image processing, salient object detection (SOD) in underwater sonar images has become an important research topic. However, due to the interference of complex underwater environments and seabed… read more here.

Keywords: detection; object detection; attention; sonar ... See more keywords

Observations of Sea-Surface Waves During the 2013 Target and Reverberation Experiment (TREX13) and Relation to Midfrequency Sonar

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recommendations! Published in 2017 at "IEEE Journal of Oceanic Engineering"

DOI: 10.1109/joe.2016.2597718

Abstract: As part of the 2013 Target and REverberation eXperiment (TREX13), which took place off the coast of Panama City, FL, USA, directional wave measurements were made using two directional wave buoys separated in range by… read more here.

Keywords: tex math; sonar; reverberation; inline formula ... See more keywords

Synthetic Aperture Sonar Image Contrast Prediction

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recommendations! Published in 2018 at "IEEE Journal of Oceanic Engineering"

DOI: 10.1109/joe.2017.2702843

Abstract: Sidescan imaging sonar performance is often described using metrics such as resolution, maximum range, and area coverage rate. These attributes focus on describing how finely and over what area a sensor can make imagery of… read more here.

Keywords: image; contrast ratio; contrast; sonar ... See more keywords

A Steganographic Approach to Sonar Tracking

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recommendations! Published in 2019 at "IEEE Journal of Oceanic Engineering"

DOI: 10.1109/joe.2018.2847160

Abstract: Steganographic transmission waveforms are desirable for many applications, such as underwater acoustic communications, surveillance, detection, and tracking. In the context of active sonar tracking, an overall approach is presented that covers several topics including background… read more here.

Keywords: sonar tracking; sonar; approach; track ... See more keywords