Results 81 to 90 of about 1,320,226 (145)

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

Inertial Navigation System for a Synthetic Aperture Sonar Towfish

, 2002
The implementation and calibration of an Inertial Navigation System (INS) for a Synthetic Aperture Sonar (SAS) towfish is presented. Sensor sampling is synchronised to the sonar transmit signal then transmitted in NMEA format to the towboat providing ...
M P Hayes, P T Gough, E N Pilbrow
core  

Multi-receiver wide-beam SAS chirp scaling imaging algorithm based on complex dual square-root series inversion

Scientific Reports
Conventional synthetic aperture sonar (SAS) imaging algorithms are typically designed for narrow-beam conditions, and their imaging performance significantly degrades under wide-beam scenarios, which severely limits the advancement of SAS imaging ...
Yunxin Tan, Guangju Li, Weiming Gan, Yi Huang, Chun Zhang   +4 more
doaj   +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

Creating an Autonomous Hovercraft for Bathymetric Surveying in Extremely Shallow Water (<1 m). [PDF]

Sensors (Basel), 2023
Troup ML, Hatcher M, Barclay D.
europepmc   +1 more source

Sonar path correction in synthetic aperture processing

, 2003
In the next generation of mine hunting sonars, in particular on Autonomous Underwater Vehicles (AUVs), Synthetic Aperture Sonar (SAS) will play an important role.
Sabel, J.C., Groen, J., Hansen, R.E.
core  

A Statistical Evaluation of the Connection between Underwater Optical and Acoustic Images

Remote Sensing
The use of Synthetic Aperture Sonar (SAS) in autonomous underwater vehicle (AUV) surveys has found applications in archaeological searches, underwater mine detection and wildlife monitoring.
Rebeca Chinicz, Roee Diamant
doaj   +1 more source

High Speed, High Resolution Seabed Mapping Using Commercial Interferometric Synthetic Aperture Sonar

, 2017
Synthetic Aperture Sonar (SAS) is seeing increased usage in commercial applications for hydrographic survey, in addition to its original designed use as a mine detection sonar.
Shea, David
core   +1 more source

Theoretical and Experimental Studies on Sensitivity and Bandwidth of Thickness-Mode Driving Hydrophone Utilizing A 2-2 Piezoelectric Single Crystal Composite. [PDF]

Sensors (Basel), 2023
Je Y, Sim M, Cho Y, Lee SG, Seo HS.
europepmc   +1 more source

A High-Accuracy Underwater Object Detection Algorithm for Synthetic Aperture Sonar Images

Remote Sensing
Underwater object detection with Synthetic Aperture Sonar (SAS) images faces many problems, including low contrast, blurred edges, high-frequency noise, and missed small objects.
Jiahui Su, Deyin Xu, Lu Qiu, Zhiping Xu, Lixiong Lin, Jiachun Zheng   +5 more
doaj   +1 more source