Results 91 to 100 of about 1,088,237 (198)

Fast GMTI Algorithm For Traffic Monitoring Based On A Priori Knowledge [PDF]

, 2012
In this paper a fast a priori knowledge-based ground moving target indication and parameter estimation algorithm applicable to single- as well as to multi-channel synthetic aperture airborne radar data is presented.
Baumgartner, Stefan Valentin, Krieger, Gerhard   +1 more
core   +1 more source

Synthetic aperture sonar

The Journal of the Marine Acoustics Society of Japan, 1999
YAMAGUCHI, Isao, KATO, Jun'ichi
openaire   +3 more sources

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

Three-Dimensional Reconstruction Method of Submarine Cables Based on High-Speed ROV Cruising with Multibeam Imaging Sonar

水下无人系统学报
Submarine cables, serving as the critical conduits for power transmission for offshore wind farms, are pivotal to the system’s stability. However, due to their complex marine environments, currently, conventional three-dimensional(3D) reconstruction ...
Haining XU, Yong WANG, Qiang JING, Tongzhen DING, Fei YU, Qingye SHEN, Shengzhe CAO   +6 more
doaj   +1 more source

Advancement of Synthetic Aperture Sonar Technique

, 2019
Synthetic aperture sonar (SAS) is a technique of high resolution underwater imaging. Synthetic large aperture is formed based on small aperture array and its motion, and high resolution image is hence obtained by means of beam forming for large aperture ...
Jiyuan, LIU
core   +1 more source

Automatic Target Recognition in Synthetic Aperture Sonar Images Based on Geometrical Feature Extraction

EURASIP Journal on Advances in Signal Processing, 2009
This paper presents a new supervised classification approach for automated target recognition (ATR) in SAS images. The recognition procedure starts with a novel segmentation stage based on the Hilbert transform.
J. Del Rio Vera, E. Coiras, J. Groen, B. Evans   +3 more
doaj   +1 more source

Synthetic Aperture Techniques for Sonar Systems

, 2009
about this segment is still very far away from that of the land segment. Synthetic aperture is a technique that enables high resolution through the coherent processing of consecutive displaced echo data. Instead of using one static large array of transducers, it uses the along-track displacement of the sensors to synthesize a large virtual array.
Srgio Rui, Srgio Cunha, Anbal Matos, Nuno Cruz   +3 more
openaire   +2 more sources

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

A Motion Compensation Method for Circular Synthetic Aperture Sonar Based on Multi-Sensor

水下无人系统学报
Circular synthetic aperture sonar(CSAS) is a high-resolution underwater imaging sonar system mounted on a mobile platform, whose imaging quality is highly sensitive to the precision of platform position and attitude.
Tianfeng HUANG, Tianming YE, Xuanmin DU, Tianlin YANG   +3 more
doaj   +1 more source

A Precise Control Method for Circular Motion of Unmanned Surface Vehicles for Circular Synthetic Aperture Sonar Imaging

Shanghai Jiaotong Daxue xuebao
Circular synthetic aperture sonar obtains all-round observation information of underwater targets by performing 360° circular motion on the imaging scene to achieve high-precision three-dimensional imaging of underwater targets, whose imaging ...
QIAO Wenchao, NIE Weimin, DU Xuanmin, LIU Benqi, YE Tianming, YANG Tianlin
doaj   +1 more source