Results 11 to 20 of about 51,255 (199)

The mr-MDA: An Invariant to Shifting, Scaling, and Rotating Variance for 3D Object Recognition Using Diffractive Deep Neural Network

Sensors, 2022
The diffractive deep neural network (D2NN) can efficiently accomplish 2D object recognition based on rapid optical manipulation. Moreover, the multiple-view D2NN array (MDA) possesses the obvious advantage of being able to effectively achieve 3D object ...
Liang Zhou, Jiashuo Shi, Xinyu Zhang
doaj   +1 more source

Generating Convergent Laguerre-Gaussian Beams Based on an Arrayed Convex Spiral Phaser Fabricated by 3D Printing

Micromachines, 2020
A convex spiral phaser array (CSPA) is designed and fabricated to generate typical convergent Laguerre-Gaussian (LG) beams. A type of 3D printing technology based on the two-photon absorption effect is used to make the CSPAs with different featured sizes,
Chang Liu, Chai Hu, Dong Wei, Mingce Chen, Jiashuo Shi, Haiwei Wang, Changsheng Xie, Xinyu Zhang   +7 more
doaj   +1 more source

Research on the light-field characteristics of patterned planar nanotip metasurface [PDF]

EPJ Web of Conferences
Metasurfaces in namo-meter are widely applied to improve the lightwave controllability. The reflection of the proposed planar nanotip metasurface in infrared regime was demonstrated to be effectively modulated, and the minimum value is ~41.0% under an ...
Liu Taige, Shao Xuan, Ji Wuyang, You Fangchen, Zhang Xinyu   +4 more
doaj   +1 more source

Multispectral High Temperature Thermography [PDF]

Sensors, 2022
The paper considers the issues of creating high-temperature digital thermographs based on RGB photodetector arrays. It has been shown that increasing the reliability of temperature measurement of bodies with unknown spectral coefficient of thermal radiation can be ensured by optimal selection of the used spectral range and registration of the observed ...
Waldemar Wójcik, Vladimir Firago, Andrzej Smolarz, Indira Shedreyeva, Bakhyt Yeraliyeva   +4 more
openaire   +5 more sources

Electrically Controlled Liquid Crystal Microlens Array Based on Single-Crystal Graphene Coupling Alignment for Plenoptic Imaging

Micromachines, 2020
As a unique electric-optics material, liquid crystals (LCs) have been used in various light-control applications. In LC-based light-control devices, the structural alignment of LC molecules is of great significance. Generally, additional alignment layers
Mingce Chen, Qi Shao, Wenda He, Dong Wei, Chai Hu, Jiashuo Shi, Kewei Liu, Haiwei Wang, Changsheng Xie, Xinyu Zhang   +9 more
doaj   +1 more source

Fourier multispectral imaging

Optics Express, 2015
Current multispectral imaging systems use narrowband filters to capture the spectral content of a scene, which necessitates different filters to be designed for each application. In this paper, we demonstrate the concept of Fourier multispectral imaging which uses filters with sinusoidally varying transmittance.
Jie, Jia, Chuan, Ni, Andrew, Sarangan, Keigo, Hirakawa   +3 more
openaire   +2 more sources

A liquid-crystal microlens with dual-layers arrayed pattern electrode for the effective modulation of incident light beams [PDF]

EPJ Web of Conferences
In this paper, an electrically controlled liquid crystal (LC) microlens array based on dual-layer arrayed planar pattern electrode is reported for effective light wave modulation.
Ye Mao, Chen Han, Wang Zhe, Liu Kewei, Zhang Xinyu   +4 more
doaj   +1 more source

A Local Feature Descriptor Based on Oriented Structure Maps with Guided Filtering for Multispectral Remote Sensing Image Matching

Remote Sensing, 2019
Multispectral image matching plays a very important role in remote sensing image processing and can be applied for registering the complementary information captured by different sensors. Due to the nonlinear intensity difference in multispectral images,
Tao Ma, Jie Ma, Kun Yu
doaj   +1 more source

Attitude Tracking Control Reconfiguration for Space Launch Vehicle With Thrust Loss Fault

IEEE Access, 2019
The thrust loss fault of the space launch vehicle is quite different from that of ordinary actuator efficiency loss. Focusing on the attitude tracking control problem of the launch vehicle with thrust loss fault, the special impacts of that fault on the ...
Yaokun Zhang, Zhu Li, Zhongtao Cheng, Lei Liu, Yongji Wang   +4 more
doaj   +1 more source

Nonlinear Deblurring for Low-Light Saturated Image

Sensors, 2023
Single image deblurring has achieved significant progress for natural daytime images. Saturation is a common phenomenon in blurry images, due to the low light conditions and long exposure times.
Shuning Cao, Yi Chang, Shengqi Xu, Houzhang Fang, Luxin Yan   +4 more
doaj   +1 more source