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    Quantitative imaging of calibrated acoustic backscatter data from the seafloor

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    IOA Conf 201509 Foote et al.pdf (146.4Kb)
    Date
    2015-09-07
    Author
    Foote, Kenneth G.  Concept link
    Robinson, Stephen P.  Concept link
    Theobald, Peter D.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/7546
    Abstract
    Two factors have often led to the neglect of instrument calibration and the loss of information in the imaging process: the power of the image and the convenient signal processing expedient of disregarding the physical nature of data. Seafloor imaging by sonar is a case in point. Notwithstanding ambitions and needs to remotely detect and identify bottom objects, determine seafloor properties, and quantify benthos, among other things, images of acoustic backscattering data are often used, misleadingly, as proxies for physical data. Since image processing is inherently nonlinear, the loss of physical data is immediate. Three processes that are essential to the attainment and maintenance of the physical nature of backscattering data are elaborated: sonar calibration to determine the transfer characteristics of the sonar, range compensation that addresses both geometric and radiometric factors, and beam pattern measurement or estimation.
    Description
    Paper presented at Seabed and Seafloor Acoustics: Measurements and Modelling conference, University of Bath, UK, 7-9 September 2015.
     
    Author Posting. © Institute of Acoustics, 2015. This article is posted here by permission of Institute of Acoustics for personal use, not for redistribution.
     
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    • Applied Ocean Physics and Engineering (AOP&E)
    Suggested Citation
    Proceedings of the Institute of Acoustics 37, pt. 1 (2015): 71-76
     

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