Results 21 to 30 of about 19,886 (166)

HULU SUNGAI PERAK BED SEDIMENT MAPPING USING UNDERWATER ACOUSTIC SONAR [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Development in acoustic survey techniques in particular side scan sonar have revolutionized the way we are able to image, map and understand the riverbed environment.
N. Arriafdi   +8 more
doaj   +1 more source

A New Radiometric Correction Method for Side-Scan Sonar Images in Consideration of Seabed Sediment Variation

open access: yesRemote Sensing, 2017
Affected by the residual of time varying gain, beam patterns, angular responses, and sonar altitude variations, radiometric distortion degrades the quality of side-scan sonar images and seriously affects the application of these images. However, existing
Jianhu Zhao   +3 more
doaj   +1 more source

Marine geophysical surveys and interpretations on the ancient Eunostos harbor Area, Mediterranean Coast, Egypt

open access: yesEgyptian Journal of Petroleum, 2023
A marine geophysical survey was carried out over the ruins of the ancient Eunostos harbor, in front of the recent western harbor of Alexandria. The survey works aimed to study the seafloor and the subsurface layers over the survey area using side-scan ...
Amr Z. Hamouda   +4 more
doaj   +1 more source

High-frequency side-scan sonar fish reconnaissance by autonomous underwater vehicles [PDF]

open access: yes, 2016
Author Posting. © The Author(s), 2016. This is the author's version of the work. It is posted here by permission of NRC Research Press for personal use, not for redistribution.
Gawarkiewicz, Glen G.   +4 more
core   +1 more source

STUDI APLIKASI MULTIBEAM ECHOSOUNDER DAN SIDE SCAN SONAR UNTUK MENDETEKSI FREE SPAN PADA SALURAN PIPA BAWAH LAUT

open access: yesGeoid, 2015
Saluran pipa bawah laut sebagai salah satu sistem distribusi dalam industri minyak dan gas harus selalu diperhatikan kondisinya agar terhindar dari risiko kerugian material maupun dampak terhadap lingkungan.
I Made Dwifa Satya Nugraha   +1 more
doaj   +1 more source

Model for Estimation of Bounds in Digital Coding of Seabed Images [PDF]

open access: yes, 2015
This paper proposes the novel model for estimation of bounds in digital coding of images. Entropy coding of images is exploited to measure the useful information content of the data.
Samcovic, A.
core   +2 more sources

Using Side-Scan Sonar instrument to Characterize and map of seabed identification target in punggur sea of the Riau Islands, Indonesia.

open access: yesJGEET: Journal of Geoscience, Engineering, Environment and Technology, 2017
Punggur sea has many habitats, object, and structured of seabed with hight tide and wave. Side scan sonar is an underwater acoustic instrument for identification of seabed.
Muhammad Zainuddin Lubis   +5 more
doaj   +1 more source

A Texture Feature Removal Network for Sonar Image Classification and Detection

open access: yesRemote Sensing, 2023
Deep neural network (DNN) was applied in sonar image target recognition tasks, but it is very difficult to obtain enough sonar images that contain a target; as a result, the direct use of a small amount of data to train a DNN will cause overfitting and ...
Chuanlong Li   +3 more
doaj   +1 more source

Underwater Side-Scan Sonar Target Detection: YOLOv7 Model Combined with Attention Mechanism and Scaling Factor

open access: yesRemote Sensing
Side-scan sonar plays a crucial role in underwater exploration, and the autonomous detection of side-scan sonar images is vital for detecting unknown underwater environments. However, due to the complexity of the underwater environment, the presence of a
Xin Wen   +4 more
doaj   +1 more source

A Small-Sample Target Detection Method of Side-Scan Sonar Based on CycleGAN and Improved YOLOv8

open access: yesApplied Sciences
Because of their low cost and ease of deployment, side-scan sonars is one of the most widely used underwater survey instruments. However, the complexity of the marine environment and the difficulty in target acquisition limit the detection accuracy of ...
Ye Zheng   +3 more
doaj   +1 more source

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