Results 21 to 30 of about 23,689 (244)
Application of a maximum likelihood processor to acoustic backscatter for the estimation of seafloor roughness parameters [PDF]
, 1994 Maximum likelihood (ML) estimation is used to extract seafloor roughness parameters from records of acoustic backscatter. The method relies on the Helmholtz–Kirchhoff approximation under the assumption of a power‐law roughness spectrum and on the ...
de Moustier, Christian +1 more
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The Development of a New Methodology for Automated Sounding Selection on Nautical Charts
Naše More (Dubrovnik), 2019 Conducting a manual sounding selection for display on official nautical charts is time-consuming and is becoming more challenging because of the high-quality hydrographic data.
Dejan Lovrinčević
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Seafloor sediment classification based on multibeam sonar data [PDF]
Geo-spatial Information Science, 2004 The multibeam sonars can provide hydrographic quality depth data as well as hold the potential to provide calibrated measurements of the seafloor acoustic backscattering strength. There has been much interest in utilizing backscatters and images from multibeam sonar for seabed type identification and most results are obtained.
Zhou Xinghua, Chen Yongqi
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Geosciences, 2019 Stones and boulders in shallow waters (0−10 m water depth) form complex geo-habitats, serving as a hardground for many benthic species, and are important contributors to coastal biodiversity and high benthic production.
Gitta Ann von Rönn +3 more
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Global automated extraction of bathymetric photons from ICESat-2 data based on a PointNet++ model
International Journal of Applied Earth Observations and Geoinformation, 2023 We developed and tested a fully automated method to extract bathymetric photons globally from ICESat-2 ATLAS data by leveraging the PointNet++ model, which performs well for classification and segmentation of point clouds.
Yiwen Lin, Anders Jensen Knudby
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Classification of Seafloor Habitats Using Genetic Programming [PDF]
, 2008 In this paper we use Genetic Programming for the classification of different seafloor habitats, based on the acoustic backscatter data from an echo sounder. By dividing the multiple-class problem into several two-class problems, we were able to produce nearly perfect results, providing total discrimination between most of the seafloor types used in ...
Sara Silva, Yao-Ting Tseng
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Classification of heterogeneous seafloor topography through surface slope distributions. [PDF]
The Journal of the Acoustical Society of America, 1991 Seafloor topography is neither spatially homogeneous, nor does it obey Gaussian statistics; deviations from both of these assumptions are important from a geological and acoustic point of view. It has been found that the distribution of topographic slopes can be used as a primary tool for understanding the sources and extent of spatial heterogeneities ...
Peter R. Shaw, Deborah K. Smith
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Analysis of Seafloor Sediment Distribution using Multibeam Backscatter Data
MATEC Web of Conferences, 2018 Multibeam sonars use an acoustic wave to provide a view of seafloor topography and collect its backscatter. Seafloor backscatter image can be used as a means of quantitative classification of seafloor lithology.
Pratomo Danar G +4 more
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Frontiers in Earth Science, 2023 Hydroacoustic observations of shallow marine environments reveal a variety of seafloor structures–both of natural and anthropogenic origin. Natural processes can result in features with circular geometries on the seafloor, such as kettles, sinkholes or ...
Giuliana Andrea Díaz-Mendoza +6 more
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Scientific Data, 2023 We provide a sequence of analysis-ready optical underwater images from the Clarion-Clipperton Zone (CCZ) of the Pacific Ocean. The images were originally recorded using a towed camera sledge that photographed a seabed covered with polymetallic manganese ...
Benson Mbani, Jens Greinert
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