Synthetic Aperture Sonar (SAS) without Navigation: Scan Registration as Basis for Near Field Synthetic Imaging in 2D [PDF]
Sensors, 2020 Sonars are essential for underwater sensing as they can operate over extended ranges and in poor visibility conditions. The use of a synthetic aperture is a popular approach to increase the resolution of sonars, i.e., the sonar with its N transducers is ...
Heiko Bülow, Andreas Birk
doaj +5 more sources
Three-Dimensional Imaging of Circular Array Synthetic Aperture Sonar for Unmanned Surface Vehicle [PDF]
Sensors, 2022 Synthetic aperture sonar (SAS) and interferometric synthetic aperture sonar (InSAS) have a range layover phenomenon during underwater observation, the AUV-mounted circular synthetic aperture sonar (CSAS) system, that insonifies targets using multiple ...
Sai Zeng, Wei Fan, Xuanmin Du
doaj +3 more sources
Journal of Marine Science and Engineering, 2021 Natural gas is an important source of energy. Underwater gas pipeline leaks, on the other hand, have a serious impact on the marine environment; hence, the need for a reliable and preferably automated inspection method is essential.
Nahid Nadimi +2 more
doaj +4 more sources
Compressive Underwater Sonar Imaging with Synthetic Aperture Processing
Remote Sensing, 2021 Synthetic aperture sonar (SAS) is a technique that acquires an underwater image by synthesizing the signal received by the sonar as it moves. By forming a synthetic aperture, the sonar overcomes physical limitations and shows superior resolution when ...
Ha-min Choi +2 more
doaj +4 more sources
Synthetic aperture imagery for high-resolution imaging sonar [PDF]
Frontiers in Marine Science, 2022 Synthetic aperture sonar (SAS) can provide high-resolution underwater images. Traditional fast imaging algorithms designed for multi-receiver synthetic aperture sonar (MSAS) are complex because the point target reference spectrum (PTRS) deduction and ...
Pan Huang, Peixuan Yang
doaj +4 more sources
Accelerated Deconvolved Imaging Algorithm for 2D Multibeam Synthetic Aperture Sonar [PDF]
Sensors, 2022 High-accuracy level underwater acoustical surveying plays an important role in ocean engineering applications, such as subaqueous tunnel construction, oil and gas exploration, and resources prospecting. This novel imaging method is eager to break through
Bo Wei, Chuanlin He, Siyu Xing, Yi Zheng
doaj +2 more sources
A hybrid filtering method with no-reference quality assessment for synthetic aperture sonar images. [PDF]
PLoS ONESynthetic Aperture Sonar (SAS) imaging technology is wildly used in the underwater applications. In the work process of SAS imaging, filtering technologies are important for SAS imaging, which can suppress different noises to improve signal quality ...
Zhiping Xu +4 more
doaj +2 more sources
Range-doppler algorithm of multireceiver synthetic aperture sonar using nonuniform signal. [PDF]
PLoS ONEWhen the structures of multireceiver synthetic aperture sonar (SAS) are applied, imaging techniques are not always able to acquire images with outstanding resolution in nonuniform situations.
Pan Huang +4 more
doaj +2 more sources
An in-air synthetic aperture sonar dataset of target scattering in environments of varying complexity [PDF]
Scientific DataThis paper describes a synthetic aperture sonar (SAS) dataset collected in-air consisting of four types of targets in four environments of different complexity.
Thomas E. Blanford +6 more
doaj +2 more sources
An Imaging Algorithm for Multireceiver Synthetic Aperture Sonar
Remote Sensing, 2019 For the multireceiver synthetic aperture sonar (SAS), the point target reference spectrum (PTRS) in the two-dimensional (2D) frequency domain and azimuth modulation in the range Doppler domain were first deduced based on a numerical evaluation method and
Xuebo Zhang, Cheng Tan, Wenwei Ying
doaj +3 more sources