Analysis of shadow contrast for synthetic aperture sonar imagery

Daniel A. Cook, Daniel Brown

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

The contrast, or depth of shadows, in synthetic aperture sonar (SAS) imagery is arguably as important to image interpretation as the focus of the backscattered returns. The maximum contrast that can be achieved is determined by a combination of hardware, software, and environmental parameters. In this paper, the impact of these parameters on shadow contrast is quantified, and the contrast ratio is developed as a metric to predict a system's capacity to form imagery with well-defined shadows. A representative SAS is described, and its contrast ratio is investigated over a limited set of environmental and hardware parameters. This contrast ratio analysis can serve a tool for predicting system performance, determining the best dynamic range for display, and bounding the effects of manufacturing tolerances and motion errors.

Original languageEnglish (US)
Title of host publicationInternational Conference on Synthetic Aperture Sonar and Synthetic Aperture Radar 2010, Proceedings of the Institute of Acoustics
Pages68-74
Number of pages7
EditionPART 4
StatePublished - Dec 1 2010
EventInternational Conference on Synthetic Aperture Sonar and Synthetic Aperture Radar 2010 - Lerici, Italy
Duration: Sep 13 2010Sep 14 2010

Publication series

NameProceedings of the Institute of Acoustics
NumberPART 4
Volume32
ISSN (Print)1478-6095

Conference

ConferenceInternational Conference on Synthetic Aperture Sonar and Synthetic Aperture Radar 2010
CountryItaly
CityLerici
Period9/13/109/14/10

Fingerprint

Synthetic aperture sonar
Hardware
Display devices

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Cook, D. A., & Brown, D. (2010). Analysis of shadow contrast for synthetic aperture sonar imagery. In International Conference on Synthetic Aperture Sonar and Synthetic Aperture Radar 2010, Proceedings of the Institute of Acoustics (PART 4 ed., pp. 68-74). (Proceedings of the Institute of Acoustics; Vol. 32, No. PART 4).
Cook, Daniel A. ; Brown, Daniel. / Analysis of shadow contrast for synthetic aperture sonar imagery. International Conference on Synthetic Aperture Sonar and Synthetic Aperture Radar 2010, Proceedings of the Institute of Acoustics. PART 4. ed. 2010. pp. 68-74 (Proceedings of the Institute of Acoustics; PART 4).
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Cook, DA & Brown, D 2010, Analysis of shadow contrast for synthetic aperture sonar imagery. in International Conference on Synthetic Aperture Sonar and Synthetic Aperture Radar 2010, Proceedings of the Institute of Acoustics. PART 4 edn, Proceedings of the Institute of Acoustics, no. PART 4, vol. 32, pp. 68-74, International Conference on Synthetic Aperture Sonar and Synthetic Aperture Radar 2010, Lerici, Italy, 9/13/10.

Analysis of shadow contrast for synthetic aperture sonar imagery. / Cook, Daniel A.; Brown, Daniel.

International Conference on Synthetic Aperture Sonar and Synthetic Aperture Radar 2010, Proceedings of the Institute of Acoustics. PART 4. ed. 2010. p. 68-74 (Proceedings of the Institute of Acoustics; Vol. 32, No. PART 4).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AB - The contrast, or depth of shadows, in synthetic aperture sonar (SAS) imagery is arguably as important to image interpretation as the focus of the backscattered returns. The maximum contrast that can be achieved is determined by a combination of hardware, software, and environmental parameters. In this paper, the impact of these parameters on shadow contrast is quantified, and the contrast ratio is developed as a metric to predict a system's capacity to form imagery with well-defined shadows. A representative SAS is described, and its contrast ratio is investigated over a limited set of environmental and hardware parameters. This contrast ratio analysis can serve a tool for predicting system performance, determining the best dynamic range for display, and bounding the effects of manufacturing tolerances and motion errors.

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Cook DA, Brown D. Analysis of shadow contrast for synthetic aperture sonar imagery. In International Conference on Synthetic Aperture Sonar and Synthetic Aperture Radar 2010, Proceedings of the Institute of Acoustics. PART 4 ed. 2010. p. 68-74. (Proceedings of the Institute of Acoustics; PART 4).