Results 1 to 10 of about 452,028 (301)

A Novel Joint Motion Compensation Algorithm for ISAR Imaging Based on Entropy Minimization [PDF]

Sensors
Space targets move in orbit at a very high speed, so in order to obtain high-quality imaging, high-speed motion compensation (HSMC) and translational motion compensation (TMC) are required.
Jishun Li, Yasheng Zhang, Canbin Yin, Can Xu, Pengju Li, Jun He   +5 more
doaj   +2 more sources

A Motion Compensation Method for Shipborne HFSWR by Using Dual Reference RF Signals Generated Onshore

Remote Sensing, 2022
The echo of shipborne high-frequency surface wave radar (HFSWR) is modulated by six-degrees-of-freedom (6-DOF) motion, affecting the detection of the target and the remote sensing of ocean surface dynamics parameters.
Maorong Chen, Jiong Niu, Ming Li, Ling Zhang, Yonggang Ji, Wenxiang Wan, Q. M. Jonathan Wu   +6 more
doaj   +1 more source

Prediction and Compensation Model of Longitudinal and Lateral Deck Motion for Automatic Landing Guidance System

Mathematics, 2022
This paper mainly studies the longitudinal and lateral deck motion compensation technology. In order to ensure the safe landing of the carrier-based aircrafts on the flight decks of carriers during the landing process, it is necessary to introduce deck ...
Chen Cheng, Zian Wang, Zheng Gong, Pengcheng Cai, Chengxi Zhang   +4 more
doaj   +1 more source

Joint ISAR imaging and azimuth scaling under low SNR using parameterized compensation and calibration method with entropy minimum criterion

EURASIP Journal on Advances in Signal Processing, 2023
In general, the method of conventional motion compensation for inverse synthetic aperture radar (ISAR) imaging is divided into translational motion compensation (TMC) and rotational motion compensation (RMC) in sequence.
Tingting He, Biao Tian, Yu Wang, Shuai Li, Shiyou Xu, Zengping Chen   +5 more
doaj   +1 more source

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

Measurement + 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, Liangpei Huang, Yong Guo, Yun Ou   +3 more
doaj   +1 more source

Noise-Robust ISAR Translational Motion Compensation via HLPT-GSCFT

Remote 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, Darong Huang, Xinrong Guo, Cunqian Feng   +3 more
doaj   +1 more source

Media resources in video information systems [PDF]

E3S 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, Ishanxadjayeva Zamira, Jaumitbaeva Mexriban   +2 more
doaj   +1 more source

Vessel Target Echo Characteristics and Motion Compensation for Shipborne HFSWR under Non-Uniform Linear Motion

Remote Sensing, 2021
For shipborne high-frequency surface wave radar (HFSWR), the movement of the ship has a great impact on the radar echo, thus affecting target detection performance.
Yonggang Ji, Yiming Wang, Weimin Huang, Weifeng Sun, Jie Zhang, Ming Li, Xiaoyu Cheng   +6 more
doaj   +1 more source

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

PLoS 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, Aiko P J de Vries, Paul de Heer, Maurice B Bizino, Ron Wolterbeek, Ton J Rabelink, Joost Doornbos, Hildo J Lamb   +7 more
doaj   +1 more source

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

Remote 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, Fubo Zhang, Yihong Sun, Longyong Chen, Zhenhua Li, Dawei Wang   +5 more
doaj   +1 more source