Results 11 to 20 of about 2,896,576 (244)

A data extraction system for underwater particle holography [PDF]

, 2000
Pulsed laser holography is an extremely powerful technique for the study of particle fields as it allows instantaneous, noninvasive high-resolution recording of substantial volumes.
Nebrensky, JJ, Craig, G, Lampitt, RS, Nareid, H, Trucco, A, Watson, J, Hobson, PR, Pescetto, A   +7 more
core   +6 more sources

Integrated Underwater Detection and Communication System Based on P4 Code-Modulated OFDM Signal

Journal of Marine Science and Engineering, 2023
Because of the requirements of marine resources exploration and underwater cooperative operation, the underwater operation of common detection and communication equipment is difficult and unreliable.
Xinglong Feng, Zhenyi Zhao, Yuzhong Zhang, Qiao Hu   +3 more
doaj   +1 more source

Colour reconstruction of underwater images [PDF]

, 2017
Objects look very different in the underwater environment compared to their appearance in sunlight. Images with correct colouring simplify the detection of underwater objects and may allow the use of visual SLAM algorithms developed for land-based robots
Wojciech Kowalczyk, Kowalczyk, Wojciech, Julian Hoth, Hoth, Julian   +3 more
core   +2 more sources

Underwater Biological Detection Based on YOLOv4 Combined with Channel Attention

Journal of Marine Science and Engineering, 2022
Due to the influence of underwater visual characteristics on the observation of underwater creatures, the traditional object detection algorithm is ineffective.
Aolun Li, Long Yu, Shengwei Tian
doaj   +1 more source

A Hybrid Sender- and Receiver-Initiated Protocol Scheme in Underwater Acoustic Sensor Networks

Sensors, 2015
In this paper, we propose a method for sharing the handshakes of control packets among multiple nodes, which we call a hybrid sender- and receiver-initiated (HSR) protocol scheme.
Jae-Won Lee, Ho-Shin Cho
doaj   +1 more source

Underwater Small Target Detection Based on YOLOX Combined with MobileViT and Double Coordinate Attention

Journal of Marine Science and Engineering, 2023
The underwater imaging environment is complex, and the application of conventional target detection algorithms to the underwater environment has yet to provide satisfactory results.
Yan Sun, Wenxi Zheng, Xue Du, Zheping Yan   +3 more
doaj   +1 more source

A potential-flow based flight simulator for an underwater glider [PDF]

, 2013
Underwater gliders are recent innovative types of autonomous underwater vehicles (AUVs) used in ocean exploration and observation. They adjust their buoyancy to dive and to return to the ocean surface.
LAURENS, Jean-Marc, DENISET, François, LE BOULLUEC, Marc, PHOEMSAPTHAWEE, Surasak, LE BOULLUEC, M.   +4 more
core   +1 more source

SotonAUV: the design and development of a small, manoeuvrable autonomous underwater vehicle [PDF]

, 2008
The University of Southampton's entry into the Student Autonomous Underwater Challenge-Europe (SAUC-E) 2007 was a custom designed and built autonomous underwater vehicle (AUV) named 'SotonAUV'.
Sharkh, S.M., Phillips, A., M Furlong, J Akhtman, Turnock, S.R., Furlong, M., A Phillips, SM Sharkh, SR Turnock, Akhtman, J., Palmer, A., Phillips, A.B., A Palmer   +12 more
core   +1 more source

Self-Supervised Pre-Training Joint Framework: Assisting Lightweight Detection Network for Underwater Object Detection

Journal of Marine Science and Engineering, 2023
In the computer vision field, underwater object detection has been a challenging task. Due to the attenuation of light in a medium and the scattering of light by suspended particles in water, underwater optical images often face the problems of color ...
Zhuo Wang, Haojie Chen, Hongde Qin, Qin Chen   +3 more
doaj   +1 more source

Underwater object detection algorithm based on channel attention and feature fusion

Xibei Gongye Daxue Xuebao, 2022
Due to the color deviation, low contrast and fuzzy object in underwater optical images, there are some problems in underwater object detection, such as missed detection and false detection.
ZHANG Yan, LI Xingshan, SUN Yemei, LIU Shudong   +3 more
doaj   +1 more source