Results 31 to 40 of about 1,765,935 (236)
A New Denoising System for SONAR Images
EURASIP Journal on Image and Video Processing, 2009 The SONAR images are perturbed by speckle noise. The use of speckle reduction filters is necessary to optimize the image exploitation procedures. This paper presents a new denoising method in the wavelet domain, which tends to reduce the speckle, preserving the structural features and textural information of the scene. Shift-invariance associated with
Isar, Alexandru +2 more
openaire +4 more sources
Dose-response relationships for the onset of avoidance of sonar by free-ranging killer whales [PDF]
, 2014 The authors acknowledge the support of the MASTS pooling initiative (The Marine Alliance for Science and Technology for Scotland) in the completion of this study.
Samarra, Filipa Isabel Pereira +21 more
core +1 more source
The use of active sonar to study cetaceans [PDF]
, 2012 Cetacean species face serious challenges worldwide due to the increasing noise pollution brought to their environment by human activities such as seismic exploration. Regulation of these activities is vaguely defined and uncoordinated.
Bernasconi, Matteo
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A risk function for behavioral disruption of Blainville’s beaked whales (Mesoplodon densirostris) from mid-frequency active sonar [PDF]
, 2014 There is increasing concern about the potential effects of noise pollution on marine life in the world’s oceans. For marine mammals, anthropogenic sounds may cause behavioral disruption, and this can be quantified using a risk function that relates sound
Ashley Dilley +37 more
core +2 more sources
SensorsMapping corrosion depths along pipeline sections using guided-wave-based tomographic methods is a challenging task. Accurate defect sizing depends heavily on the precision of the forward model in guided wave tomography.
Emiel Hassefras +2 more
doaj +1 more source
High-Resolution Imaging Method of Deconvolution MIMO Sonar Based on Acoustic Homing Platform
水下无人系统学报To address the demand for precise imaging of the desired guidance part of a target by an undersea vehicle, this paper attempted to apply multiple-input multiple-output(MIMO) sonar imaging to the acoustic homing platform of an underwater vehicle for the ...
Zhiyuan CUI +4 more
doaj +1 more source
Robust Underwater Localization Using Acoustic Image Alignment for Autonomous Intervention Systems
IEEE Access, 2022 Acoustic imaging sonar can be used as important navigation sensors for underwater intervention systems as they consistently provide spatial information about the surrounding environment, even in limited visibility conditions.
Jisung Park, Jinwhan Kim
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Advances in the Design and Functionality of a Compact Multi-Reflecting Time-of-Flight Mass Spectrometer. [PDF]
Rapid Commun Mass SpectromABSTRACT Rationale High‐resolution mass spectrometry is routinely used for the analysis of complex samples in pharmaceutical, environmental, and omics related studies. Such applications demand instrumentation to be capable of combining sub‐ppm mass accuracy, high resolving power, rapid full m/z range acquisition over a wide dynamic range.
Wildgoose J +7 more
europepmc +2 more sources
Exploitation of SAS interferometric phase statistics for coherent change detection
Electronics Letters, 2023 Coherent change detection (CCD) takes advantage of the interferometric processing of synthetic aperture sonar (SAS) images and enables the detection of small scale changes to the scene between image pairs.
Emma Shouldice, Vincent Myers
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Remote Sensing, 2020 In recent years, widespread use of scanning sonars for acoustic imaging of the seabed surface can be observed. These types of sonars are mainly used with tripods or special booms, or are mounted onboard remotely operated or unmanned vehicles.
Artur Grządziel
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