Results 161 to 170 of about 20,086 (211)

A new generation side scan sonar

OCEANS '88. 'A Partnership of Marine Interests'. Proceedings, 2003
Side-scan sonar traditionally has used a graphic paper recording system for the display and annotation of the data. A novel side-scan system specifically designed to use color video as the primary data display is described. Several design considerations and tradeoffs are discussed, some of which are unique to a system using a video display.
R.G. Asplin, C.G. Christensson
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

Side scan sonar technology

OCEANS 2000 MTS/IEEE Conference and Exhibition. Conference Proceedings (Cat. No.00CH37158), 2002
Selection of the correct side scan sonar system for a specific application is difficult for the typical ocean operator. The source of this difficulty results from the diversity of side scan sonar designs and a general lack of knowledge on the capabilities and restrictions of available side scan sonar systems.
openaire   +1 more source

Side-scan sonar image matching

IEEE Journal of Oceanic Engineering, 1998
This 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, F. Le Leannec, C. Roux, B. Soliman, E.P. Maillard   +4 more
openaire   +1 more source

Digitising of side-scan sonar signals

Ultrasonics, 1976
Abstract 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

The geological interpretation of side-scan sonar

Reviews of Geophysics, 1990
Recent developments in side‐scan sonar technology have increased the potential for fundamental changes in our understanding of ocean basins. Developed in the late 1960s, “side looking” sonars have been widely used for the last two decades to obtain qualitative estimates of the acoustic properties of the materials of the seafloor. Modern developments in
H. Paul Johnson, Maryann Helferty
openaire   +3 more sources

Segmentation and Classification of Side-Scan Sonar Data

2012
Side scan sonar is an acoustic sensor which uses sound waves to generate side scan sonar images. Most adaptive behavior of AUVs would require that the vehicle be able sense the environment, detect objects of interest, localize and then change its current behavior.
Mahesh Khidkikar, Ramprasad Balasubramanian   +1 more
openaire   +1 more source

Nearshore Side-Scan Sonar Studies

Journal of Atmospheric and Oceanic Technology, 1993
Abstract Side-scan sonars operating at 80–250 kHz have been deployed to produce narrow beams directed parallel and normal to shore on a gently sloping beach. These provide measurements of processes (such as wave propagation) seaward of the edge of the surf zone.
S. A. Thorpe, A. J. Hall
openaire   +1 more source

Side scan sonar acoustic variability

OCEANS '88. 'A Partnership of Marine Interests'. Proceedings, 2003
The authors report the results of research on the inherent variability of side-scan sonar imagery to determine the magnitude and nature of image intensity fluctuations. Two experiments are presented in which a Klein 100-kHz system is operated under controlled conditions that remove all but purely instrumental and acoustic causes of image variability ...
J.W. Nicholson, J.S. Jaffe
openaire   +1 more source

Side scan sonar in oyster management

Oceans '02 MTS/IEEE, 2003
Oyster harvest from Mississippi reefs provide jobs for numerous fishermen and contribute substantially to the economy. Proper management of these reefs is vital for continued harvest. Enhancement management techniques (i.e. cultch planting and/or cultivation) should helps to ensure even greater future production.
D. Diaz, K. Cuevas, M. Buchanan, S. Gordon, W.S. Perret   +4 more
openaire   +1 more source