Results 1 to 10 of about 7,352 (70)
Sensors, 2022 In pursuit of high imaging quality, optical sparse aperture systems must correct piston errors quickly within a small range. In this paper, we modified the existing deep-learning piston detection method for the Golay-6 array, by using a more powerful ...
Senmiao Wang +7 more
doaj +1 more source
Optical Design of the Goaly3 Multi-Mirror Telescope System with a Wide Field of View
Applied Sciences, 2021 A Golay3 multi-mirror telescope (MMT) system is designed in this paper. The fill factor of the Golay3 MMT is derived from the angular resolution of the telescope. An initial configuration is established according to the paraxial optical theory.
Junliu Fan +4 more
doaj +1 more source
Stability of Cauchy horizon in a charged de-Sitter spacetime with dark matter
European Physical Journal C: Particles and Fields, 2023 The violation of strong cosmic censorship (SCC) in RNdS black holes by a minimally coupled neutral massless scalar field has recently been discovered. This paper investigates the stability of the Cauchy horizon of a spherically charged de-Sitter black ...
Xue-Ying Nan, Jia Tan, Jie Jiang
doaj +1 more source
Micro-expression Recognition Method Combining Feature Fusion and Attention Mechanism [PDF]
Jisuanji kexue, 2022 Micro-expression refers to an uncontrollable muscle movement on the face when people try to hide or suppress their true emotions.Due to the short duration,small motion range,and difficulty in concealing and restraining,the recognition accuracy of such ...
LI Xing-ran, ZHANG Li-yan, YAO Shu-jing
doaj +1 more source
Optical Flow Calculating Method Based on Multi-scale V1-MT Feedforward Model [PDF]
Jisuanji gongcheng, 2017 In order to solve the problem of great computational error of optical flow information under large displacement and weak texture,an optical flow computational method based on an improved V1-MT feedforward model is proposed.By taking video sequences as ...
ZHANG Wenda,XU Yuelei,MA Shiping,LI Shuai,ZOU Hongzhong
doaj +1 more source
Detection of Human Movement Direction Using Optical Flow Analisys on Multiple Camera Angles
Jurnal Nasional Teknik Elektro, 2021 The active movement of children poses a safety risk in the absence of adult supervision. To reduce the risk of accidents in children, an automatic detection system for the direction of children's movements is crucially needed.
Elvira Sukma Wahyuni +2 more
doaj +1 more source
A quick, reliable, and automated method for fat cell sizing
Journal of Lipid Research, 2003 Mean diameters of fat cells from abdominal tissues from 31 volunteers were determined by three methods based on fat cell isolation after collagenase digestion and methylene blue staining.
Yourka D. Tchoukalova +4 more
doaj +1 more source
Improvement in detection of presence in forbidden locations in video anomaly using optical flow map [PDF]
هوش محاسباتی در مهندسی برق, 2023 Anomaly detection has been in researchers’ scope of study for a long time. The wide variety of anomaly detection use cases ranges from quality control in production lines to providing security in public places.
Mohammad Rahimpour +3 more
doaj +1 more source
Journal of Open Research Software, 2017 This paper describes OpenOpticalFlow, an open source optical flow program in Matlab for extraction of high-resolution velocity fields from various flow visualization images.
Tianshu Liu
doaj +1 more source
An orbital energy flow and a spin flow at the tight focus
Компьютерная оптика, 2021 We have shown that a reverse energy flow (negative projection of the Poynting vector onto the optical axis) at the sharp focus of an optical vortex with topological charge 2 and left-hand circular polarization arises because the axial spin flow has a ...
S.S. Stafeev
doaj +1 more source