Results 21 to 30 of about 1,579,940 (284)

Modeling and simulation analysis of active heave compensation control system for electric-driven marine winch under excitation of irregular waves

open access: yesMeasurement + Control, 2023
The six-degree-of-freedom (6 DOF) motion of the mother-ship, which is caused by wave fluctuation, makes offshore operations difficult. To solve this problem, various heave compensation systems were proposed, as well as the law of wave motion. These heave
Tiancai Xie   +3 more
doaj   +1 more source

Noise-Robust ISAR Translational Motion Compensation via HLPT-GSCFT

open access: yesRemote Sensing, 2022
Translational motion compensation is a prerequisite of inverse synthetic aperture radar (ISAR) imaging. Translational motion compensation for datasets with low signal-to-noise ratio (SNR) is important but challenging.
Fengkai Liu   +3 more
doaj   +1 more source

Media resources in video information systems [PDF]

open access: yesE3S Web of Conferences, 2023
The article describes methods for increasing the contrast of images in video information systems, the main compression of the video stream is provided by eliminating inter-frame redundancy using methods for compensating the movement of image fragments of
Beknazarova Saida   +2 more
doaj   +1 more source

Metabolic imaging of human kidney triglyceride content: reproducibility of proton magnetic resonance spectroscopy. [PDF]

open access: yesPLoS ONE, 2013
OBJECTIVE: To assess the feasibility of renal proton magnetic resonance spectroscopy for quantification of triglyceride content and to compare spectral quality and reproducibility without and with respiratory motion compensation in vivo.
Sebastiaan Hammer   +7 more
doaj   +1 more source

Motion Error Estimation and Compensation of Airborne Array Flexible SAR Based on Multi-Channel Interferometric Phase

open access: yesRemote Sensing, 2023
Airborne array synthetic aperture radar (SAR) has made a significant breakthrough in the three-dimensional resolution of traditional SAR. In the airborne array SAR 3D imaging technology, the baseline length is the main factor restricting the resolution ...
Ling Yang   +5 more
doaj   +1 more source

Motion compensation using joint-sub-band phase unwrapping for synthetic aperture sonar [PDF]

open access: yesJASA Express Letters, 2022
Displaced phase center antenna (DPCA) micro-navigation has been widely applied in the motion compensation of synthetic aperture sonars (SASs). Estimating the time delay is the most important step for DPCA-based motion compensation.
Shiping Chen   +6 more
doaj   +1 more source

Progressive mesh-based motion estimation using partial refinement [PDF]

open access: yes, 2006
A technique for performing progressive mesh-based motion estimation in a layered fashion is presented. Motion compensation based on image warping provides a block prediction free of block artifacts.
Park, Heechan   +5 more
core   +1 more source

Transforms for the motion compensation residual [PDF]

open access: yes2009 IEEE International Conference on Acoustics, Speech and Signal Processing, 2009
The Discrete-Cosine-Transform (DCT) is the most widely used transform in image and video compression. Its use in image compression is often justified by the notion that it is the statistically optimal transform for first-order Markov signals, which have been used to model images.
Kamisli, Fatih, Lim, Jae S.
openaire   +3 more sources

Motion compensation with a scanned ion beam: a technical feasibility study

open access: yesRadiation Oncology, 2008
Background Intrafractional motion results in local over- and under-dosage in particle therapy with a scanned beam. Scanned beam delivery offers the possibility to compensate target motion by tracking with the treatment beam.
Kraft Gerhard   +4 more
doaj   +1 more source

Slice group based multiple description video coding with three motion compensation loops [PDF]

open access: yes, 2005
The paper proposes a novel scheme for a multiple description video coding approach using the slice group coding tool proposed in H.264. Three motion compensation loops, one central and two side loops, are maintained for two descriptions in the encoder ...
Canagarajah, CN, Wang, D, Bull, DR
core   +1 more source

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