Results 251 to 260 of about 993,247 (318)

Low-altitude infrared small target detection based on fully convolutional regression network and graph matching

Infrared Physics and Technology, 2021
The high-precision infrared small target detection under low-altitude background has a high application value. The existing small IR target detection methods usually fail or cause a high probability of false alarm in the highly moving and complex low ...
Huaichao Wang, Haifeng Li, Haitian Zhou, Xinwei Chen   +3 more
semanticscholar   +3 more sources

Track-Feature-Based Target Classification in Passive Radar for Low-Altitude Airspace Surveillance

IEEE Sensors Journal, 2021
The low-altitude airspace is becoming more and more busy. To ensure low-altitude safety, non-cooperative systems (e.g. the passive radars) should be developed in addition to the cooperative ones. Nevertheless, several classes of targets (e.g.
Weijie Zhan, Jianxin Yi, X. Wan, Yunhua Rao   +3 more
semanticscholar   +3 more sources

Research on Low-altitude UAV Aerial Photography Target Detection

2022 International Conference on Computer Network, Electronic and Automation (ICCNEA), 2022
Aiming at the problems of low detection accuracy and missed detection in low altitude UAV aerial photography target detection, a target detection algorithm based on improved YOLOv5 is proposed in this paper.
Jin Liu, Ying Lu, Yusi Chen, Qianqian Zhao, Zilu Qin, Yanfang Fu   +5 more
openaire   +2 more sources

Spatial and temporal features selection for low-altitude target detection

Aerospace Science and Technology, 2015
Abstract Target detection in plane position indicator (PPI) radar images aims at separating moving targets from complicated background image. Background subtraction is a powerful mechanism for such applications. Since there is still much clutter left in the foreground image after background subtraction, an optimal classification plane (OCP) should be
Weishi Chen
openaire   +2 more sources

An EM model for radar multipath simulation and HRRP analysis of low altitude target above electrically large composite scale rough surface

Electromagnetics, 2018
P. Peng, Li Xin Guo, C. Tong
semanticscholar   +3 more sources

Low altitude target model for radar simulation

IEEE Transactions on Aerospace and Electronic Systems, 2002
openaire   +3 more sources

Radar Tracking of Low-Altitude Targets

IEEE Transactions on Aerospace and Electronic Systems, 1974
The antenna elevation control signal and the associated staticequilibrium equations are analyzed for the case of tracking of lowaltitude targets for both monopulse and conical-scanning radar. Three possible equilibrium positions of the radar antenna under static operating conditions are ascertained.
GIULI, DINO, M. Calamia, G. Franceschetti, R. Tiberio   +3 more
openaire   +2 more sources

A Novel Research in Low Altitude Acoustic Target Recognition Based on HMM

International Journal of Multimedia Data Engineering and Management, 2021
This paper introduces an improved HMM (hidden Markov model) for low altitude acoustic target recognition. To overcome the limitation of the classical CDHMM (continuous density hidden Markov model) training algorithm and the generalization ability deficiency of existing discriminative learning methods, a new discriminative training method for estimating
Hui Liu 0032, Wei Wang 0176, Chuang Wen Wang   +2 more
openaire   +1 more source

A Novel Spatiotemporal Saliency Method for Low-Altitude Slow Small Infrared Target Detection

IEEE Geoscience and Remote Sensing Letters, 2021
The effective monitoring of low-altitude slow small (LSS) targets represented by unmanned aerial vehicle (UAV) is a great challenge in the field of security in recent years.
Dongdong Pang, T. Shan, Pengge Ma, Wei Li, Shengheng Liu, R. Tao   +5 more
semanticscholar   +1 more source

Low-Altitude Slow Small Target Threat Assessment Algorithm by Exploiting Sequential Multifeature With Long Short-Term Memory

IEEE Sensors Journal, 2023
For the preservation of low-airspace security, a comprehensive threat assessment of low-altitude slow small (LSS) flying targets is essential. Threat assessment intrinsically depends on effectively extracting the optimal attributes from tracks, which ...
Xiaojie Yu, Song Wei, Yuyuan Fang, Jialian Sheng, Lei Zhang   +4 more
semanticscholar   +1 more source