Results 41 to 50 of about 6,273,313 (270)
A Method for the Interpretation of Sonar Data Recorded during Autonomous Underwater Vehicle Missions
Polish Maritime Research, 2022 Image acquisition from autonomous underwater vehicles (AUVs) is useful for mapping objects on the seabed. However, there are few studies on the interpretation of data collected with side-scan sonar during autonomous underwater vehicle missions.
Zieja Mariusz +3 more
doaj +1 more source
Efficient Approach for OS-CFAR 2D Technique Using Distributive Histograms and Breakdown Point Optimal Concept applied to Acoustic Images [PDF]
, 2019 In this work, a new approach to improve the algorithmic efficiency of the Order Statistic-Constant False Alarm Rate (OS-CFAR) applied in two dimensions (2D) is presented.
Acosta, Gerardo Gabriel +3 more
core +2 more sources
Robotics: Science and Systems I, 2005 This paper demonstrates that sonar images correlate badly because target geometry and image fringes correlate in different coordinate systems. It is shown that if the receiver is a line array, all point objects have the same image in a coordinate system with axes of range and the sine of target bearing (the (r, s) coordinate system).
Richard J. Rikoski +2 more
openaire +1 more source
A review on the wavelet methods for sonar image segmentation
International Journal of Advanced Robotic Systems, 2020 The sonar image segmentation is needed such as in underwater object orientation and recognition, in collision prevention and navigation of underwater robots, in underwater investigation and rescue, in seafloor object seeking, in seafloor salvage, and in ...
Yuanyuan Tian, Luyu Lan, Haitao Guo
doaj +1 more source
A Track Initiation Method Based on Multiple Accumulation of Active Sonar Images
水下无人系统学报, 2023 To meet the requirements of autonomous detection of underwater moving targets in a strong reverberation background, a track initiation algorithm based on multiple accumulations of active sonar images was proposed to solve the problem of large amounts of ...
Kai WANG, Junsheng JIAO
doaj +1 more source
, 2001 A manual scan sonar integrates multiple technologies into a compact and low cost single beam sonar having the ability to generate wide sector views comparable to that of much larger and more expensive multiple-beam sonar units. The manual scan sonar uses a piezoelectric transducer, orientation and motion sensors, a power preamplifier and amplifier, and
Keith Lent, Kenneth Krueger
openaire +2 more sources
Breaking Wave Imaging Using Lidar and Sonar [PDF]
IEEE Journal of Oceanic Engineering, 2020 The two-phase flow generated by breaking ocean waves plays a crucial role in various geophysical processes, including dissipation of wave energy and atmospheric gas exchange. This paper presents a technique to measure the two-phase flow generated by breaking waves at prototype scale.
Oscar Bryan +3 more
openaire +1 more source
Electronics, 2021 Side-scan sonar is widely used in underwater rescue and the detection of undersea targets, such as shipwrecks, aircraft crashes, etc. Automatic object classification plays an important role in the rescue process to reduce the workload of staff and ...
Q. Ge +5 more
semanticscholar +1 more source
An Adaptive Image-stitching Algorithm for an Underwater Monitoring System
International Journal of Advanced Robotic Systems, 2014 Against the narrow range of sonar images for underwater monitoring, an adaptive sonar image-stitching algorithm is proposed in this paper. Compared with conventional sonar image-stitching algorithms, this algorithm can be applied to stitch sonar images ...
Li Hengyu +4 more
doaj +1 more source
AUV SLAM and experiments using a mechanical scanning forward-looking sonar [PDF]
, 2012 Navigation technology is one of the most important challenges in the applications of autonomous underwater vehicles (AUVs) which navigate in the complex undersea environment.
ArulamPalam +29 more
core +4 more sources