Results 21 to 30 of about 1,248,801 (164)
A Comparison of PCA and LBF Based Multireceiver SAS Imaging Algorithms
IEEE Access, 2023 Multireceiver synthetic aperture sonar (SAS) is a useful tool to provide high-resolution images. The most important step lies in developments of multireceiver synthetic aperture image formation processors, which uses the sonar echoed signal as the input.
Meng Wang, Pan Huang
doaj +1 more source
Multireceiver SAS Imagery Based on Monostatic Conversion
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 To use monostatic based imaging algorithms for multireceiver synthetic aperture sonar, the monostatic conversion is often carried out based on phase centre approximation, which is widely exploited by multireceiver SAS systems.
Xuebo Zhang +3 more
doaj +1 more source
An omega‐k algorithm for multireceiver synthetic aperture sonar
Electronics Letters, 2023 In this Letter, the authors present a novel imaging algorithm for multireceiver synthetic aperture sonar (SAS). The Loffeld's bistatic formula (LBF) including quasi‐monostatic (QM) and multireceiver deformation (MD) phases is first reformulated into ...
Xuebo Zhang, Peixuan Yang, Haixin Sun
doaj +1 more source
Remote Sensing, 2022 The disposal of unexploded ordnance (UXOs) at sea is a global problem. The mapping and remediation of historic UXOs can be assisted by autonomous underwater vehicles (AUVs) carrying sensor payloads such as synthetic aperture sonar (SAS) and optical ...
Oscar Bryan +4 more
doaj +1 more source
Deep convolutional neural networks for semi-supervised learning from synthetic aperture sonar (SAS) images [PDF]
The Journal of the Acoustical Society of America, 2017 Advancements in deep neural networks for computer-vision tasks have the potential to improve automatic target recognition (ATR) in synthetic aperture sonar (SAS) imagery. Many of the recent improvements in computer vision have been made possible by densely labeled datasets such as ImageNet.
Johnny Chen, Jason E. Summers
openaire +1 more source
Motion Compensation in High Resolution Synthetic Aperture Sonar (SAS) Images [PDF]
, 2009 The sequence of echoes detected by an active Synthetic Aperture Sonar (SAS) is coherently added in an appropriate way to produce an image with greatly enhanced resolution in the azimuth, or along-track direction when compared with an image obtained from a standard Side Looking Sonar (SLS). The SAS processing originates from the Synthetic Aperture Radar
R. Heremans, Y. Dupont, M. Acheroy
openaire +1 more source
The Journal of Engineering, 2019 Based on the method of deriving two-dimensional wavenumber spectrum by using instantaneous Doppler wavenumber in bistatic synthetic aperture radar, the analytical solution of two-dimensional wavenumber spectrum of multi-receiver synthetic aperture sonar (
Jinbo Wang, Jinsong Tang, Zhen Tian
doaj +1 more source
Adaptive phase estimation filter in long range synthetic aperture sonar interferometry
Electronics Letters, 2023 Synthetic aperture sonar (SAS) interferometry is a technique for very high resolution imaging and mapping of the seabed. In SAS interferometry, the seabed depth estimation performance is a function of the system, the geometry, the signal‐to‐noise ratio ...
Torstein Olsmo Sæbø, Roy Edgar Hansen
doaj +1 more source
Efficient imaging method for multireceiver SAS
IET Radar, Sonar & Navigation, 2022 With the Loffeld's bistatic formula, the point target reference spectrum (PTRS) of multireceiver synthetic aperture sonar (SAS) can be decomposed into the quasi monostatic term and bistatic deformation (BD) term.
Xuebo Zhang +3 more
doaj +1 more source
Synthetic aperture sonar imaging using compressive sensing and an ultrasound transducer array [PDF]
, 2013 Includes bibliographical references.Compressive sensing (CS) also known as compressive sampling is a technique used to reconstruct or recover the full-length of a signal with only a few non-adaptive measurements.
Jideani, Josiah Chimnanu
core +1 more source