Geometrical Spreading Correction in Sidescan Sonar Seabed Imaging
نویسندگان
چکیده
منابع مشابه
Geometrical Spreading Correction in Sidescan Sonar Seabed Imaging
Sound backscattered to a sonar from a seabed decreases in intensity with increasing range (R) due to geometrical spreading. As a far-range approximation, a geometrical spreading correction of +30 log R decibels may be applied. A correction based on an accurate estimation of the area of the seabed ensonified by the sonar pulse incorporates additional terms that are a function of: range, sonic ra...
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1 Abstract This paper presents a technique for the classiication and analysis of seabed sediments from sidescan sonar image, the origins of which lie in the body of fractal theory. Six seabed types were analysed, namely clay, mud, sand, gravel, stones and rock. These data sets have previously been analysed by several authors who have used techniques based on the power spectrum. The method propo...
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This paper proposes an original method for the 3-D reconstruction of seabed from multiple sidescan sonar images. The proposed method adopts a stereo-like vision approach based on a combination of the GPS positioning and the image matching technology to correspond among multiple sidescan sonar images taken from different viewmints. and then estract the 3-D structure information of 'seabed from t...
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Seagrass distribution and other measures of seagrass condition have been used as broad scale biological indicators of marine and estuarine health. To date the distribution of seagrass in the Swan-Canning Estuary has been assessed based on aerial photographs, which is ineffective in deep, turbid waters. Sidescan sonar systems (SSS) provide acceptable results in a much wider range of environmenta...
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B R Calder, L M Linnett and D R Carmichael Heriot-Watt University, Scotland and DRA Bincleaves, England
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ژورنال
عنوان ژورنال: Journal of Marine Science and Engineering
سال: 2017
ISSN: 2077-1312
DOI: 10.3390/jmse5040054