Results 51 to 60 of about 1,248,801 (164)
An Improved Backprojection Autofocus Method for Synthetic Aperture Sonar
IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.We propose an improved backprojection (BP) autofocus method for synthetic aperture sonar (SAS), which reduces the computational overhead of existing methods using Anderson acceleration (AA) and the sparsity of high‐intensity pixels in imagery. ABSTRACT Autofocus methods effectively compensate for multi‐source phase errors in synthetic aperture radar ...
Shiping Chen +6 more
wiley +1 more source
IEEE Access, 2022 To improve the imaging quality of conventional imaging algorithms without motion compensation (MOCO) and the efficiency of point-by-point MOCO algorithms for multiple-receiver synthetic aperture sonar (SAS) with azimuth-invariant six-degree of freedom ...
Zhen Tian +3 more
doaj +1 more source
Side‐Scan Sonar Image‐Based Object Detection With YOLOv8
IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.This paper discusses a side‐scan sonar detection method based on YOLOv8. ABSTRACT The detection methods of side‐scan sonar images based on YOLOv3 and YOLOv5 suffer from issues such as insufficient feature extraction capability, high miss rate for small targets and limited localisation accuracy.
Dandan Liu +4 more
wiley +1 more source
High resolution digital holographic synthetic aperture applied to deformation measurement and extended depth of field method [PDF]
, 2010 This paper discusses the potential of the synthetic-aperture method in digital holography to increase the resolution, to perform high accuracy deformation measurement, and to obtain a three-dimensional topology map.
Claus, Daniel
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An Improved Imaging Algorithm for Multi-Receiver SAS System with Wide-Bandwidth Signal
Remote Sensing, 2021 When the multi-receiver synthetic aperture sonar (SAS) works with a wide-bandwidth signal, the performance of the range-Doppler (R-D) algorithm is seriously affected by two approximation errors, i.e., point target reference spectrum (PTRS) error and ...
Xuebo Zhang, Peixuan Yang
doaj +1 more source
IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.The traditional elevation information extraction methods have issues such as limited precision of the elevation extraction and complex processing flow. Thus, an elevation information extraction scheme based on the sub‐aperture correlation using airborne CSAR imaging is proposed.
Hongtu Xie +3 more
wiley +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
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Multipath Reflectivity Estimation in Urban Environments for Synthetic Aperture Radar Images [PDF]
, 2010 Synthetic Aperture Radar (SAR) images a target region reflectivity function in the multi-dimensional spatial domain of range and cross-range. SAR synthesizes a large aperture radar in order to achieve a finer azimuth resolution than the one provided by ...
Arriba Ruiz, Imanol de +5 more
core +1 more source
A Subaperture Motion Compensation Algorithm for Wide-Beam, Multiple-Receiver SAS Systems
Journal of Marine Science and Engineering, 2023 Uncompensated motion errors can seriously affect the imaging quality of synthetic aperture sonars (SASs). In the existing line-by-line motion compensation (MOCO) algorithms for wide-beam multiple-receiver SAS systems, the approximate form of the range ...
Jiafeng Zhang +4 more
doaj +1 more source
IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.Airborne circular synthetic aperture radar (CSAR) has the ability of multiangle observation and high‐resolution imaging in remote sensing applications, but its imaging performance is often degraded by the platform motion error and terrain undulation error.
Hongtu Xie +3 more
wiley +1 more source