Results 31 to 40 of about 1,320,226 (145)
A wide-beam NCS algorithm for multi-receiver SAS based on azimuth spectrum superposition
Frontiers in Marine Science, 2023 The existing multi-receiver synthetic aperture sonar (SAS) imaging algorithms are suitable for narrow-beam width, which will lead to a decrease in imaging quality under wide-beam condition and are not in line with the development needs of SAS. We propose
Mingqiang Ning +5 more
doaj +1 more source
Frequency‐domain multireceiver synthetic aperture sonar imagery with Chebyshev polynomials
Electronics Letters, 2022 Based on Chebyshev polynomials, the two‐way slant range is first approximated by the fourth‐order polynomial approximation. With the series reversion method, the point target reference spectrum (PTRS) which is further used for the development of imaging ...
Xuebo Zhang, Peixuan Yang, Haixin Sun
doaj +1 more source
A Novel Imaging Algorithm for Wide-Beam Multiple-Receiver Synthetic Aperture Sonar Systems
Remote Sensing, 2023 In existing imaging algorithms for wide-beam multiple-receiver synthetic aperture sonar (SAS) systems, the double-square-root (DSR) range history of each receiver is generally converted into the sum of a single-square-root (SSR) range history and an ...
Jiafeng Zhang +4 more
doaj +1 more source
Joint Motion Error Estimation Algorithm for Multibeam Synthetic Aperture Sonar
IEEE Access, 2018 Multibeam echo sounder (MBES) and synthetic aperture sonar (SAS) are effective image sonar systems used as the major underwater observation instruments. The MBES system can get the fullscan detection without gaps, while the resolution on the along-track ...
Bo Wei, Haisen Li, Tian Zhou, Chao Xu
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
Sedimentology, Volume 73, Issue 3, Page 593-619, April 2026.ABSTRACT Mesophotic reefs are located in low light conditions which, depending on the region, are usually found in water depths greater than ~30 m. They are less affected by ocean warming than reefs found in shallower water depths and thus might become increasingly important for the sustainability of marine biodiversity.
Or M. Bialik +7 more
wiley +1 more source
Advanced Processing for Synthetic Aperture Sonar
, 2021 Synthetic aperture sonar (SAS) is a technique for acoustic imaging and mapping of the seafloor. SAS systems are typically operated from autonomous underwater vehicles in a side-looking configuration.
Synnes, Stig Asle Vaksvik
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Seafloor Sediment Detection with Sidescan Sonar Image Based on YOLO11 and YOLO26
Electronics Letters, Volume 62, Issue 1, January/December 2026.This paper focuses on the demand of seafloor sediment detection using SSS images. It systematically compares the architectural differences and comprehensive performance of YOLO11 and YOLO26. The two models form differentiated adaptation for different application scenarios. ABSTRACT The study of seafloor geomorphology is the core foundation for decoding
Dandan Liu +3 more
wiley +1 more source
Evaluation of YOLO Key Modules Using Synthetic Aperture Images
Electronics Letters, Volume 62, Issue 1, January/December 2026.Four typical YOLO modules based on YOLOv8, YOLOv11, YOLOv12 and YOLOv13 are focused on in this letter. Significant potential is owned by the work in this letter to provide some important conclusions for users choice. Experimental support and data preparation are also provided for future YOLO architecture optimisation research. ABSTRACT Target detection
Dandan Liu, Yuxiang Ding, Zhiping Xu
wiley +1 more source
Histogram Layers for Synthetic Aperture Sonar Imagery
, 2022 Synthetic aperture sonar (SAS) imagery is crucial for several applications, including target recognition and environmental segmentation. Deep learning models have led to much success in SAS analysis; however, the features extracted by these approaches ...
Peeples, Joshua +3 more
core +1 more source