Results 141 to 150 of about 7,038 (175)

Electromagnetic Metasurface with Object Information and Position Illusion in Radar Vision at Microwave Frequencies

Advanced Optical Materials, 2023
AbstractCamouflage skills are important for understanding the relationship between predators and prey in ecological systems. Mimicry is a common strategy used by creatures to alter their appearance in order to blend in with their surroundings and avoid detection.
Yingjian Sun, Chun Wang, Honglin Yuan, Weibin Sun, Xujin Yuan, Ming Jin, Qian Wang, Mingji Chen   +7 more
openaire   +1 more source

Design of antijamming in microwave remote-vision system

Proceedings of International Symposium on Electromagnetic Compatibility ELMAGC-97, 1997
This paper presents the design of a helix filter used to suppress the jamming in a microwave remote-vision system, analyses the mathematical model of the helix filter and gives the design of the helix filter with a frequency bandwidth from 566 MHz to 578 MHz.
null Zhang Liyi, null Wang Huakui
openaire   +1 more source

3D vision of electromagnetic fields in antenna and microwave technique

15th Conference on Microwave Techniques COMITE 2010, 2010
Two approaches, Virtual Reality Modeling Language (VRML) and graphic library OpenGL, are used for active stereoscopic vision of electromagnetic fields surrounding selected antenna or microwave elements. Input data are generated by analytical relations or acquired by electromagnetic field simulators and visualized in the form of vector fields and field ...
Milan Polivka, Jaroslav Chlouba, Petr Cerny, Pavel Hazdra, Zbynek Skvor   +4 more
openaire   +1 more source

Experimental results of a new system using microwaves for vision correction

SPIE Proceedings, 2009
Technology is in development to correct vision without the use of lasers or cutting of the eye. Many current technologies used to reshape the cornea are invasive, in that either RF needles are placed into the cornea or a flap is cut and then a laser used to ablate the cornea in the optical zone.
Thomas P. Ryan, Radha Pertaub, Steven R. Meyers, Russell P. Dresher, Ronald Scharf   +4 more
openaire   +1 more source

A Machine Vision-Based Heating Control Design for the Microwave Maintenance Vehicle

Advanced Materials Research, 2013
Traditionally, human vision is applied to locating the region of the asphalt pavement defects. This will bring large variations for heating control of the microwave maintenance vehicle due to a shortage of the accurate control data. In this paper, a novel machine vision-based method was proposed to produce the control data precisely for the heating ...
Lei Zhang, Kai Teng, Li Juan Yang, Wen Jin Wu, Lu Fang Qin   +4 more
openaire   +1 more source

Numerical model and analysis of an energy-based system using microwaves for vision correction

SPIE Proceedings, 2009
A treatment system was developed utilizing a microwave-based procedure capable of treating myopia and offering a less invasive alternative to laser vision correction without cutting the eye. Microwave thermal treatment elevates the temperature of the paracentral stroma of the cornea to create a predictable refractive change while preserving the ...
Radha Pertaub, Thomas P. Ryan
openaire   +1 more source

Noise Suppression in Microwave Imagery by Exploitation of the MTF Approach to Human Vision

6th European Microwave Conference, 1976, 1976
Optimised presentation of images from a microwave holographic system is essential, particularly the suppression of the effects of noise on the human visual system. Recent research into the human visual system has led to Fourier models of the visual cortex, and the proposition that object recognition is possible on relatively few critical low spatial ...
A.P. Anderson, P.R. Armstrong, J.C. Bennett, J.E.W. Mayhew   +3 more
openaire   +1 more source

A mobile high-power microwave link for vision and sound

Journal of the Institution of Electrical Engineers, 1952
The equipment described constitutes a radio link for transmitting one video and two audio signals from an outside-broadcast site back to base. The power output is 4 watts at 4400–4800 Mc/s with paraboloids 4 ft in diameter. Double frequency-modulation is used for the audio signals to reduce cross-modulation. Details of the r.f.
openaire   +1 more source

Stereo vision measurements of soil surfaces and their utility in testing microwave backscattering models

IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293), 2003
One of the critical constraints on examining the microwave returns from soils quantitatively is the measurement of the soil surface roughness. Unfortunately, the complexity of soil surfaces means that direct measurements are extremely time-consuming and also likely to miss possibly important structure.
A.J. Mcdonald, S. Crossley, J.C. Bennett, G. Cookmartin, K. Morrison, S. Quegan   +5 more
openaire   +1 more source

The left-behind human detection and tracking system based on vision with multi-model fusion and microwave radar inside the bus

Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2020
Left-behind humans inside the car or bus have caused a lot of accidents, so it is essential to detect the humans in vehicle. Current human detection methods rely on wearable devices, oxygen sensors, and special seat designs in vehicles, but those sensors cannot adapt to ever-changing environments.
Jiacai Liao, Guoliang Xiang, Libo Cao, JiaHao Xia, Luyao Yue   +4 more
openaire   +1 more source