Results 131 to 140 of about 1,226 (172)

A New Generation Side Scan Sonar

1993
While it is now possible, with multibeam echosounders, to obtain true bathymetric images of the sea floor up to ranges of 10 km 1,2, the best way of imaging the underwater relief with high resolution at lower ranges remains the side scan sonar 3. This 30 years old technique is however limited in several aspects that will be discussed later.
Pierre Alais, Pascal Challande, François Ollivier, Nicolas Cesbron   +3 more
openaire   +1 more source

Object detection in side scan sonar

SPIE Proceedings, 2015
Automatic target detection is a challenging task as the response from an underwater target may vary greatly depending on its configuration, sonar parameters and the environment. We propose a Z- test algorithm for target detection in side scan sonar image which avoids this problem that covers the variation in the target response.
Wenwu Wang, Binbin Cheng, Yao Chen
openaire   +1 more source

Historical development of side scan sonar

The Journal of the Acoustical Society of America, 2017
The 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

Manatee habitat characterization using side-scan sonar

Journal of the Marine Biological Association of the United Kingdom, 2019
AbstractIdentifying benthic substrates is important to researchers studying aquatic organisms in fresh and salt water systems. Benthic substrates are often not visible from the surface making it necessary to find another method to gather these data.
Mindy J. McLarty, Daniel Gonzalez-Socoloske, Anmari Alvarez-Alemán, Jorge Angulo-Valdés   +3 more
openaire   +1 more source

Geometrical Correction of Side-scan Sonar Images

2018 IEEE International Conference on the Science of Electrical Engineering in Israel (ICSEE), 2018
The underwater environment makes object-detection missions difficult. Side-scan Sonar (SSS) has been found to be suitable for seabed scanning missions, however the sonar images acquired from SSS often suffer from considerable noise and geometrical distortion, which changes the understanding of the texture, size, and shape of seabed objects. In order to
Tal Sheffer, Hugo Guterman
openaire   +1 more source

Intensity correction of Side-Scan Sonar images

Proceedings of the 2014 IEEE Emerging Technology and Factory Automation (ETFA), 2014
This paper presents a new method to remove the effects of uneven ensonification in Side-Scan Sonar (SSS) acoustic images, facilitating their use in underwater robotics. A Lambertian model is used for the sonar scattering process, relating the received echo with the ensonification intensity, the sea bed reflectivity and the incidence angle.
Antoni Burguera, Gabriel Oliver
openaire   +1 more source

Fusion of multiple side-scan sonar views

Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600), 2005
A new set of techniques for the construction of large-scale side-scan mosaics is presented in this paper. The complete procedure operates in two main stages. First an accurate registration of the source side-scan images is performed by filtering navigation data, where an augmented state Rauch-Tung-Striebel (RTS) filter is used to smooth the stochastic ...
E. Coiras, I. Tena Ruiz, Y. Petillot, D.M. Lane   +3 more
openaire   +1 more source

Improved AUV navigation using side-scan sonar

Oceans 2003. Celebrating the Past ... Teaming Toward the Future (IEEE Cat. No.03CH37492), 2003
The following paper presents results from a novel solution for improving the navigation of an autonomous underwater vehicle (AUV) using a side-scan sonar. It is derived from a system that has been developed to produce high quality mosaics using a Doppler velocity log (DVL), a triaxial compass and a side-scan sonar.
I. Tena Ruiz, Y. Petillot, D.M. Lane
openaire   +1 more source

New Capabilities for Side-Scan Sonar

1998
Now 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.
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Anomaly Detection in Side-Scan Sonar

OCEANS 2021: San Diego – Porto, 2021
Jeremy Paul Coffelt, Jesper Haahr Christensen   +1 more
openaire   +1 more source