Results 81 to 90 of about 1,248,801 (164)

Synthetic Aperture Sonar Compressive Sensing Imaging by Iterative Optimization Based on Ridge Regression

IEEE Access
Synthetic aperture sonar (SAS) imaging based on compressive sensing (CS) has shown strong potential for high-resolution reconstruction under sparse sampling conditions.
Yingqi Yang, Linyuan Guo, Liran Ma
doaj   +1 more source

Area and depth coverage assessment for low-frequency synthetic aperture sonar unexploded ordnance detection surveys

, 2021
44Low frequency synthetic aperture sonar (LF-SAS) is a key technique for the detection and characterization of unexploded ordnance (UXO) in the underwater environment. For buried UXO, however, it is rather difficult to determine the range and depth up to
Beckers, A.L.D., Vossen, R. van, Mulders, I., Duijster, A.J., Burg, D. van der, Sande, J.J.M. van de   +5 more
core  

High-resolution mapping of ocean floor based on synthetic aperture technique

Frontiers in Marine Science
To improve the imaging performance of multireceiver synthetic aperture sonar system, this paper proposes a new imaging methodology. The presented approach exploits the idea of Loffeld’s bistatic formula (LBF) that is an accurate spectrum.
Lili Zhang, Jiaqi Liu, Jing Feng, Peng Wu, Zhiping Xu   +4 more
doaj   +1 more source

Digital Beamforming on Receive: Techniques and Optimization Strategies for High-Resolution Wide-Swath SAR Imaging [PDF]

, 2009
Synthetic Aperture Radar (SAR) is a well-proven imaging technique for remote sensing of the earth. However, conventional SAR systems are not capable to fulfill the increasing demands for im-proved spatial resolution and wider swath coverage.
Alberto Moreira, Moreira, Alberto, Nicolas Gebert, Gebert, Nicolas, Krieger, Gerhard, Gerhard Krieger   +5 more
core  

A novel deconvolution beamforming algorithm for virtual phased arrays [PDF]

, 2013
Beamforming techniques using phased microphone arrays are one of the most common tools for localizing and quantifying noise sources. However, the use of such devices can result in a series of well-known disadvantages regarding, for instance, their very ...
Fernandez Comesana, Daniel, Fernandez Grande, Efren, Holland, Keith R., Tiana Roig, Elisabet   +3 more
core   +1 more source

Deep Adaptive Phase Learning: Enhancing Synthetic Aperture Sonar Imagery Through Learned Coherent Autofocus

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Having well-focused synthetic aperture sonar (SAS) imagery is important for its accurate analysis and support of autonomous systems. Despite advances in motion estimation and image formation methods, there persists a need for robust autofocus algorithms ...
Isaac D. Gerg, Daniel A. Cook, Vishal Monga   +2 more
doaj   +1 more source

Survey on the Developments of Unmanned Marine Vehicles: Intelligence and Cooperation. [PDF]

Sensors (Basel), 2023
Bae I, Hong J.
europepmc   +1 more source

An Ultra-Lightweight and High-Precision Underwater Object Detection Algorithm for SAS Images

Remote Sensing
Underwater Object Detection (UOD) based on Synthetic Aperture Sonar (SAS) images is one of the core tasks of underwater intelligent perception systems. However, the existing UOD methods suffer from excessive model redundancy, high computational demands ...
Deyin Xu, Yisong He, Jiahui Su, Lu Qiu, Lixiong Lin, Jiachun Zheng, Zhiping Xu   +6 more
doaj   +1 more source

Spectral Normalized CycleGAN with Application in Semisupervised Semantic Segmentation of Sonar Images. [PDF]

Comput Intell Neurosci, 2022
Zhang Z, Tang J, Zhong H, Wu H, Zhang P, Ning M.   +5 more
europepmc   +1 more source

Two-Dimensional Space-Variant Motion Compensation Algorithm for Multi-Hydrophone Synthetic Aperture Sonar Based on Sub-Beam Compensation

Remote Sensing
For a multi-hydrophone synthetic aperture sonar (SAS), the instability of the platform and underwater turbulence easily lead to two-dimensional (2-D) space-variant (SV) motion errors.
Haoran Wu, Fanyu Zhou, Zhimin Xie, Jingsong Tang, Heping Zhong, Jiafeng Zhang   +5 more
doaj   +1 more source