Results 21 to 30 of about 3,433 (166)

Prospects and Constraints of Lowest Astronomical Tide (LAT) as Determination of Sea Boundaries in Indonesia

Egyptian Journal of Aquatic Research, 2023
The determination of the maritime boundary is related to the selection of the tidal datum used in relation to the zero-depth reference. This research was conducted to determine the impact of the zero-depth reference that has been used, the Mean Low Water
Eka Djunarsjah, Candida A.D.S. Nusantara, Andika P. Putra, Riko A. Wijaya, Sehat S. Sianturi, Nofal M.K. Anantri, Difa Kusumadewi, Miga M. Julian   +7 more
doaj   +1 more source

Sample Augmentation Method for Side-Scan Sonar Underwater Target Images Based on CBL-sinGAN

Journal of Marine Science and Engineering
The scarcity and difficulty in acquiring Side-scan sonar target images limit the application of deep learning algorithms in Side-scan sonar target detection.
Chengyang Peng, Shaohua Jin, Gang Bian, Yang Cui, Meina Wang   +4 more
doaj   +1 more source

DBnet: A Lightweight Dual-Backbone Target Detection Model Based on Side-Scan Sonar Images

Journal of Marine Science and Engineering
Due to the large number of parameters and high computational complexity of current target detection models, it is challenging to perform fast and accurate target detection in side-scan sonar images under the existing technical conditions, especially in ...
Quanhong Ma, Shaohua Jin, Gang Bian, Yang Cui, Guoqing Liu   +4 more
doaj   +1 more source

A simple method for retrieving significant wave height from Dopplerized X-band radar [PDF]

Ocean Science, 2017
Retrieving spectral wave parameters such as the peak wave direction and wave period from marine radar backscatter intensity is very well developed.
R. Carrasco, M. Streßer, J. Horstmann
doaj   +1 more source

A Curvelet-Transform-Based Image Fusion Method Incorporating Side-Scan Sonar Image Features

Journal of Marine Science and Engineering, 2023
Current methods of fusing side-scan sonar images fail to tackle the issues of shadow removal, preservation of information from adjacent strip images, and maintenance of image clarity and contrast. To address these deficiencies, a novel curvelet-transform-
Xinyang Zhao, Shaohua Jin, Gang Bian, Yang Cui, Junsen Wang, Bo Zhou   +5 more
doaj   +1 more source

A Method for Full-Depth Sound Speed Profile Reconstruction Based on Average Sound Speed Extrapolation

Journal of Marine Science and Engineering
The speed of sound in seawater plays a crucial role in determining the accuracy of multibeam bathymetric measurements. In deep-sea multibeam measurements, the challenge of inadequate longitudinal coverage of sound speed profiles arises from variations in
Wei Zhang, Shaohua Jin, Gang Bian, Chengyang Peng, Haixing Xia   +4 more
doaj   +1 more source

Hydrography of the Nile [PDF]

The Geographical Journal, 1905
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W., A. S., Garstin, William
openaire   +1 more source

SIGAN: A Multi-Scale Generative Adversarial Network for Underwater Sonar Image Super-Resolution

Journal of Marine Science and Engineering
Super-resolution (SR) is a technique that restores image details based on existing information, enhancing the resolution of images to prevent quality degradation.
Chengyang Peng, Shaohua Jin, Gang Bian, Yang Cui   +3 more
doaj   +1 more source

An Automatic Generalization Method of a Block-Based Digital Depth Model Based on Surface Curvature Features

Journal of Marine Science and Engineering
Addressing the limitations of current multi-scale seabed terrain construction methods for a Digital Depth Model (DDM) and the low computational efficiency of automatic generalization algorithms, this paper draws on the concept of curvature simplification
Dong Wang, Jian Dong, Lulu Tang, Mengkai Ma, Tian Xie   +4 more
doaj   +1 more source

DS-SIAUG: A Self-Training Approach Using a Disrupted Student Model for Enhanced Side-Scan Sonar Image Augmentation

Sensors
Side-scan sonar is a principal technique for subsea target detection, where the quantity of sonar images of seabed targets significantly influences the accuracy of intelligent target recognition.
Chengyang Peng, Shaohua Jin, Gang Bian, Yang Cui   +3 more
doaj   +1 more source