Results 161 to 170 of about 2,181,991 (197)
Some of the next articles are maybe not open access.
Side-scan sonar image matching
IEEE Journal of Oceanic Engineering, 1998This paper presents a method for the matching of underwater images acquired with acoustic sensors. As a final objective, the system aims at matching data from two-dimensional scenes. The proposed approach carries out a hypothetical reasoning based on objects, represented by shadows and echoes in the sonar images, and their available features.
S. Daniel +4 more
openaire +1 more source
1984
The side scan sonar represents the only high-resolution seismic tool that provides coverage to both sides of a survey vessel’s track. It is a most practical and valuable tool for obtaining an acoustic picture of the sea floor. Operational side scan sonar systems were developed at the British National Institute of Oceanography following World War II, as
openaire +1 more source
The side scan sonar represents the only high-resolution seismic tool that provides coverage to both sides of a survey vessel’s track. It is a most practical and valuable tool for obtaining an acoustic picture of the sea floor. Operational side scan sonar systems were developed at the British National Institute of Oceanography following World War II, as
openaire +1 more source
Digitising of side-scan sonar signals
Ultrasonics, 1976Abstract A criterion for judging the adequacy of the digitisation rate of side-scanning sonar records has been established by inspection of the two-dimensional Fourier power spectrum of areas of record. The lowest digitising rate necessary to retain the information content in the signal is an important parameter in the efficient and economical ...
E. Whipp, D.A. Horne
openaire +1 more source
Development of a side scan sonar module for the underwater simulator
2017 14th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI), 2017In this paper, we implemented the Side Scan Sonar (SSS) module for the UnderWater Simulator (UWSim) [1], specifically focusing on sonar image simulation. To obtain the simulated SSS images, we adopted the Lambertian diffusion model [2]. The beam profile was modeled using a pair of sine wave functions.
Dae-Hyeon Gwon +5 more
openaire +2 more sources
Historical development of side scan sonar
The Journal of the Acoustical Society of America, 2017The seabed mapping side scan sonar, conceived and developed in the 1950s at the U.S. Navy Mine Defense Laboratory (USNMDL) [Commander and Sternlicht, J. Acoust. Soc. Am. 137, 2307 (2015)], was inspired by the Royal Navy ASDIC Type-162, a late-WWII hull mounted side-looking sonar capable of recording the silhouettes of bottomed U-boats. The commissioned
openaire +1 more source
Classification and mosaicking of side scan sonar image
OCEANS 2017 - Aberdeen, 2017As an underwater detection sensor, side-scan sonar plays an important role in marine survey, mineral exploration, underwater archaeology and so on. During the use of side-scan sonar, classifiication and mosaicking of collected images is essential in most cases. There are two main contributions in our work.
Qixin Sha +6 more
openaire +1 more source
New Capabilities for Side-Scan Sonar
1998Now that side-scan sonar has become a generally accepted remote sensing tool, technical developments are proceeding at a rapid pace. Until recently, basic systems primarily used straightforward analog signal processing, and digital techniques were confined to recorder functions such as stepping motor drivers.
openaire +1 more source
Processing of the information from side-scan sonar
SPIE Proceedings, 2016The kinetic model, describing sound propagation in a randomly inhomogeneous medium with diffuse reflection by Lambert's cosine law on the bottom surface, is considered. Based on it the inverse problem of bottom scattering reconstruction is formulated.
Evgeny O. Kovalenko +2 more
openaire +1 more source
The improvement of side-scan sonar's towfish
2011 Second International Conference on Mechanic Automation and Control Engineering, 2011Since our first side-scan sonar was used more than twenty years. With more and more users and the using times grown up, We found something was not very convenient during using. So we have made some change in the design along with the users experience. This article introduce the improvement of the side-scan sonar's towfish.
openaire +1 more source
Theory and test of bathymetric side scan sonar
OCEANS '88. 'A Partnership of Marine Interests'. Proceedings, 2003Bathymetric, or interferometric, side-scan-sonars offer great improvement over conventional hydrographic and bathymetric techniques, because their broad swath makes it possible to survey an area more efficiently, their high spatial resolution makes it less likely to miss an obstruction of feature, and their image output gives valuable information about
openaire +1 more source