Results 11 to 20 of about 98,746 (302)
Remote Sensing, 2021 Marine ecosystem monitoring requires observations of its attributes at different spatial and temporal scales that traditional sampling methods (e.g., RGB imaging, sediment cores) struggle to efficiently provide.
Juan C. Montes-Herrera +5 more
doaj +1 more source
ASSESSMENT OF CHROMATIC ABERRATIONS FOR GOPRO 3 CAMERAS IN UNDERWATER ENVIRONMENTS [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019 With underwater photogrammetric mapping becoming more prominent due to the lower costs for waterproof cameras as well as lower costs for underwater platforms, the aim of this research is to investigate chromatic aberration in underwater environments ...
P. Helmholz, D. D. Lichti
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A new 3-D modelling method to extract subtransect dimensions from underwater videos [PDF]
, 2012 Underwater video transects have become a common tool for quantitative analysis of the seafloor. However a major difficulty remains in the accurate determination of the area surveyed as underwater navigation can be unreliable and image scaling does not ...
Fillinger, Laura, Funke, Tobias
core +2 more sources
A method of studying trawl models in the experimental station of the faculty of sea fisheries and food technology [PDF]
Acta Ichthyologica et Piscatoria, 1986 Techniques of measurements and underwater observations of models of trawls and other fishing gear in a lake, with the use of a motor catamaran, are presented.
Z. Kwidziński
doaj +3 more sources
Energy Harvesting Hybrid Acoustic-Optical Underwater Wireless Sensor Networks Localization
Sensors, 2017 Underwater wireless technologies demand to transmit at higher data rate for ocean exploration. Currently, large coverage is achieved by acoustic sensor networks with low data rate, high cost, high latency, high power consumption, and negative impact on ...
Nasir Saeed +3 more
doaj +1 more source
Underwater Communication Using UAVs to Realize High-Speed AUV Deployment
Remote Sensing, 2021 To monitor ocean and seafloor properties in detail, sensors are generally installed on autonomous underwater vehicles (AUVs). An AUV cannot accurately determine its absolute position and needs to communicate with a sea-surface vehicle.
Yusuke Yokota, Takumi Matsuda
doaj +1 more source
Sensor Modeling for Underwater Localization Using a Particle Filter
Sensors, 2021 This paper presents a framework for processing, modeling, and fusing underwater sensor signals to provide a reliable perception for underwater localization in structured environments.
Humberto Martínez-Barberá +2 more
doaj +1 more source
Oceanographic and underwater acoustics research : conducted during the period 1 November 1960 - 30 April 1961 [PDF]
, 1961 Digital computing techniques have been used in special computing applications in underwater acoustics at WHOI for many years, but recently we have commenced intensive application of digital data handling and computing facilities to a variety of computing,
Woods Hole Oceanographic Institution, /
core +1 more source
Environmental boundary tracking and estimation using multiple autonomous vehicles [PDF]
, 2008 In this paper, we develop a framework for environmental boundary tracking and estimation by considering the boundary as a hidden Markov model (HMM) with separated observations collected from multiple sensing vehicles.
Bertozzi, Andrea L., Jin, Zhipu
core +1 more source
Sensors, 2020 The paper presents an application of the Conditionally-Minimax Nonlinear Filtering (CMNF) algorithm to the online estimation of underwater vehicle movement given a combination of sonar and Doppler discrete-time noisy sensor observations.
Andrey Borisov +3 more
doaj +1 more source