Cart (Loading....) | Create Account
Close category search window

Towards more accurate shadow modelling for simulated SAS imagery

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Hunter, A.J. ; Dept. of Electr. & Comput. Eng., Canterbury Univ., Christchurch, New Zealand ; Hayes, M.P.

Shadows are a feature of particular interest in Synthetic Aperture Sonar (SAS) imagery. Shadows are cast by objects or features that are proud of the sea-floor. The shape of a shadow reveals information on the structure of the object or feature and can be used to assist in target classification. In most existing simulated imagery, the shadows are well-defined and resemble those obtained by conventional, high-frequency sonars. In practice, shadows are not well-defined or are sometimes lost in imagery obtained by low-frequency, free-towed, shallow-water SAS systems. In this paper, we show our attempts to simulate realistic SAS imagery and demonstrate some of the mechanisms responsible for the shadow degradation that is seen in practice. Our simulator uses a novel facet-based scattering model that incorporates wide-beam effects, shadowing, and multiple scattering. Using our simulator, we show that the fidelity of the shadow region is degraded by wide-beam effects, multi-path scattering from the sea-surface, and reconstruction artefacts caused by deviations from a linear tow-path.

Published in:

Oceans 2005 - Europe  (Volume:1 )

Date of Conference:

20-23 June 2005

Need Help?

IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.