Ontology-Enhanced Vision System for New Microscopy Imaging Challenges

2012 ◽  
pp. 157-172
Author(s):  
Nicolas Lomenie ◽  
Daniel Racoceanu
Keyword(s):  
Vision System ◽  
Microscopy Imaging

Low - Voltage Scanning Electron Microscopy Imaging, Secondary and Backscatter, With Microchannel Plate Detector

1990 ◽  
Vol 48 (1) ◽  
pp. 442-442
Author(s):  
Galen Powers ◽  
Ray Cochran
Keyword(s):  
Low Voltage ◽  
Beam Current ◽  
Microchannel Plate ◽  
Normal Operation ◽  
Microscopy Imaging ◽  
Backscatter Signal ◽  
Vacuum Interface ◽  
Width Measurements ◽  
Working Distance ◽  
Beam Currents

The capability to obtain symmetrical images at voltages as low as 200 eV and beam currents less than 9 pico amps is believed to be advantageous for metrology and study of dielectric or biological samples. Symmetrical images should allow more precise and accurate line width measurements than currently achievable by traditional secondary electron detectors. The low voltage and current capability should allow imaging of samples which traditionally have been difficult because of charging or electron beam damage.The detector system consists of a lens mounted dual anode MicroChannel Plate (MCP) detector, vacuum interface, power supplies, and signal conditioning to interface directly to the video card of the SEM. The detector has been miniaturized so that it does not interfere with normal operation of the SEM sample handling and alternate detector operation. Biasing of the detector collection face will either add secondaries to the backscatter signal or reject secondaries yielding only a backscatter image. The dual anode design allows A−B signal processing to provide topological information as well as symmetrical A+B images.Photomicrographs will show some of the system capabilities. Resolution will be documented with gold on carbon. Variation of voltage, beam current, and working distance on dielectric samples such as glass and photoresist will demonstrate effects of common parameter changes.

A closed-loop, ACT-R approach to modeling approach and landing with and without synthetic vision system (SVS) technology

2004 ◽  
Author(s):  
Michael D. Byrne ◽  
Alex Kirlik ◽  
Michael D. Fleetwood ◽  
David G. Huss ◽  
Alex Kosorukoff ◽  
...  
Keyword(s):  
Closed Loop ◽  
Vision System ◽  
Modeling Approach ◽  
Synthetic Vision

SVM-based global vision system of sports competition and action recognition

2020 ◽  
pp. 1-12
Author(s):  
Changxin Sun ◽  
Di Ma
Keyword(s):  
Target Recognition ◽  
Vision System ◽  
Task Assignment ◽  
Recognition Algorithm ◽  
Control Factor ◽  
Training Time ◽  
Adaboost Algorithm ◽  
Advantages And Disadvantages ◽  
Time Control ◽  
Correlation Degree

In the research of intelligent sports vision systems, the stability and accuracy of vision system target recognition, the reasonable effectiveness of task assignment, and the advantages and disadvantages of path planning are the key factors for the vision system to successfully perform tasks. Aiming at the problem of target recognition errors caused by uneven brightness and mutations in sports competition, a dynamic template mechanism is proposed. In the target recognition algorithm, the correlation degree of data feature changes is fully considered, and the time control factor is introduced when using SVM for classification,At the same time, this study uses an unsupervised clustering method to design a classification strategy to achieve rapid target discrimination when the environmental brightness changes, which improves the accuracy of recognition. In addition, the Adaboost algorithm is selected as the machine learning method, and the algorithm is optimized from the aspects of fast feature selection and double threshold decision, which effectively improves the training time of the classifier. Finally, for complex human poses and partially occluded human targets, this paper proposes to express the entire human body through multiple parts. The experimental results show that this method can be used to detect sports players with multiple poses and partial occlusions in complex backgrounds and provides an effective technical means for detecting sports competition action characteristics in complex backgrounds.

Modern Technology for Image processing and Computer vision -A Review

2018 ◽  
Vol 1 (2) ◽  
pp. 17-23
Author(s):  
Takialddin Al Smadi
Keyword(s):  
Image Processing ◽  
Computer Vision ◽  
Augmented Reality ◽  
Video Compression ◽  
Video Processing ◽  
Vision System ◽  
Citrus Fruit ◽  
Modern Technology ◽  
Image And Video Processing ◽  
Depth Video

This survey outlines the use of computer vision in Image and video processing in multidisciplinary applications; either in academia or industry, which are active in this field.The scope of this paper covers the theoretical and practical aspects in image and video processing in addition of computer vision, from essential research to evolution of application.In this paper a various subjects of image processing and computer vision will be demonstrated ,these subjects are spanned from the evolution of mobile augmented reality (MAR) applications, to augmented reality under 3D modeling and real time depth imaging, video processing algorithms will be discussed to get higher depth video compression, beside that in the field of mobile platform an automatic computer vision system for citrus fruit has been implemented ,where the Bayesian classification with Boundary Growing to detect the text in the video scene. Also the paper illustrates the usability of the handed interactive method to the portable projector based on augmented reality.   © 2018 JASET, International Scholars and Researchers Association

Multifunctional stereoscopic machine vision system with multiple 3D outputs

2020 ◽  
Keyword(s):  
Machine Vision ◽  
International Symposium ◽  
Fast Track ◽  
Vision System ◽  
Machine Vision System ◽  
Stereoscopic Displays ◽  
Electronic Imaging

Fast track article for IS&T International Symposium on Electronic Imaging 2020: Stereoscopic Displays and Applications proceedings.

The effect of increased intraoperative intraocular pressure on blood flow in the central retinal artery and posterior short ciliary arteries during phacoemulsification

2020 ◽  
pp. 147-148
Author(s):  
R.B. Shliakman ◽  
◽  
Y.V. Takhtaev ◽  
T.N. Kiseleva ◽  
◽  
...  
Keyword(s):  
Blood Flow ◽  
Intraocular Pressure ◽  
Vision System ◽  
Central Retinal Artery ◽  
Ciliary Arteries ◽  
Retinal Artery

Актуальность. Принципом факоэмульсификации является поддержание баланса ирригационно-аспирационных потоков. Баланс достигается за счет различных систем подачи жидкости, позволяющих хирургу задавать и поддерживать постоянный уровень ВГД во время операции. Вопрос об оптимальном безопасном уровне ВГД во время вмешательства на сегодняшний день остается открытым. Цель. Оценить влияние повышенного уровня интраоперационного офтальмотонуса на скорость кровотока в центральной артерии, вене сетчатки, и задних коротких цилиарных артериях. Материал и методы. В исследование было включено 29 пациентов с начальной катарактой. Факоэмульсификация выполнялась на приборе Alcon Centurion vision system на предустановленном интраоперационном уровне ВГД 60 мм.рт.ст. Скорость кровотока измеряли путем дуплексного сканирования в режиме ЦДК трёхкратно: до вскрытия глазного яблока, интраоперационно на уровне ВГД (58.77±8.28 мм.рт. ст) и сразу после герметизации доступа и нормализации ВГД. Каждое измерение сопровождалось контролем ВГД и АД. Результаты. При значении уровня ВГД 58.77±8.28 мм.рт. ст в ЦАС и ЗКЦА отмечалось статистически достоверное снижение максимальной систолической скорости кровотока. С 12,62±3,07 до 9,93±2,77 см/с и снижение конечной диастолической скорости кровотока с 3,94±1,09 до 1,79±1,64 см/с. В 11 из 29 (37,9%) случаев скорость кровотока в ЦАС в диастолическую фазу не регистрировалась. Максимальная систолическая скорость кровотока в ЗКЦЛА снизилась на 22%. Конечная диастолическая снизилась с 5,11±1,83 до 2,97±1,27 см/с. Аналогично, максимальная систолическая скорость кровотока с медиальной стороны упала с 12,37±2,74 до 9,50±1,68 см/с, а конечная диастолическая скорость кровотока снизилась с 4,54±1,35 до 2,73± 0,91 см/с. Скорость кровотока в ЦВС менялась незначительно и не зависела от уровня ВГД. Выводы. На уровне ВГД 58.77±8.28 мм. рт. ст. у человека отсутствуют компенсаторные механизмы ауторегуляции глазного кровотока в ответ на резкое повышение интраоперационного уровня ВГД, вплоть до полного прекращения кровотока в ЦАС в диастолическую фазу, что может приводить к ишемии тканей сетчатки.

ROBOTIC MANIPULATOR REMANUFACTURED GIFTED VISION SYSTEM FOR WELDING APPLICATION

2017 ◽  
Author(s):  
Fagner Guilherme Ferreira Coelho ◽  
Alexandre Bracarense ◽  
Eduardo Lima II ◽  
Marcelo Henrique Souza Bomfim
Keyword(s):  
Vision System ◽  
Robotic Manipulator

Dual-stage piezo nanopositioner for high-speed ion conductance microscopy imaging

2020 ◽  
Vol 28 (10) ◽  
pp. 2203-2214
Author(s):  
Jian ZHUANG ◽  
◽  
Zhi-wu WANG ◽  
Xiao-bo LIAO ◽  
Keyword(s):  
High Speed ◽  
Microscopy Imaging ◽  
Ion Conductance ◽  
Dual Stage
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