نتایج جستجو برای: illuminator

تعداد نتایج: 241  

Journal: :Real-Time Imaging 2002
Qiang Ji Xiaojie Yang

T his paper describes a real-time prototype computer vision system for monitoring driver vigilance. The main components of the system consists of a remotely located video CCD camera, a specially designed hardware system for real-time image acquisition and for controlling the illuminator and the alarm system, and various computer vision algorithms for simultaneously, real-time and non-intrusivel...

2014
Su Yeong Gwon Chul Woo Cho Hyeon Chang Lee Won Oh Lee Kang Ryoung Park

Conventional gaze tracking systems are limited in cases where the user is wearing glasses because the glasses usually produce noise due to reflections caused by the gaze tracker's lights. This makes it difficult to locate the pupil and the specular reflections (SRs) from the cornea of the user's eye. These difficulties increase the likelihood of gaze detection errors because the gaze position i...

2008
Ernst Polnau Mikhail A. Vorontsov

It is well known that atmospheric turbulence can severely degrade performance of various optical systems including the laser beam projection systems discussed here. These systems are designed to create and maintain a laser spot of the smallest possible size on a remotely located object in the atmosphere. Compensation (mitigation) of turbulence effects in the laser beam projection systems is typ...

Journal: :Applied sciences 2022

Wood used in production processes can be infected by various fungi growing on its surface. The presence of the wood surface results from method storage, handling and transport wood. However, carries a high risk to health operators users. At same time, it has negative impact quality durability manufactured products. Because risks indicated, an attempt was made develop industrial, automated syste...

Journal: :Remote Sensing 2023

The coupling and spatial variation of range azimuth parameters is the biggest challenge for bistatic forward-looking SAR (BFSAR) imaging. In contrast with monostatic translational invariant (TI-BSAR), cell migration (RCM), Doppler high-speed (HS-BFSAR) have two-dimensional characteristics, which makes it difficult to obtain images satisfactory global focusing. Firstly, based on configuration sp...

Journal: :IEEE Transactions on Aerospace and Electronic Systems 2021

This article investigates the target detection capability of a passive forward scatter radar (PFSR) exploiting digital video broadcasting - terrestrial (DVB-T) transmitter as illuminator opportunity. By means theoretical and simulated analyses, it is shown that conventional processing schemes might suffer from significant performance degradation when orthogonal frequency division multiplexing (...

Journal: :CoRR 2017
Liangtian Wan Xianpeng Wang Guoan Bi

In this paper, an effective target detection and localization method is proposed for a passive bistatic radar (PBR) system. The PBR system consists of a commercial FM radio station, which is a noncooperative illuminator of opportunity (IO), referred to as the transmitter antenna and multiple surveillance antennas that form an antenna array, e.g., uniform linear array (ULA). Unlike other literat...

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