中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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Contour Primitive of Interest Extraction Network Based on Dual-Metric One-Shot Learning for Vision Measurement 期刊论文  OAI收割
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS, 2023, 卷号: 19, 期号: 4, 页码: 5839-5848
作者:  
Qin, Fangbo;  Lin, Shan;  Xu, De
  |  收藏  |  浏览/下载:14/0  |  提交时间:2023/11/17
Quasi-Talbot effect of orbital angular momentum beams for generation of optical vortex arrays by multiplexing metasurface design 期刊论文  OAI收割
NANOSCALE, 2018, 卷号: 10, 期号: 2, 页码: 666-671
作者:  
Gao, Hui;  Li, Yang;  Chen, Lianwei;  Jin, Jinjin;  Pu, Mingbo
  |  收藏  |  浏览/下载:40/0  |  提交时间:2019/08/23
A new method of DEM generation from contour line EI期刊论文  OAI收割
2012
作者:  
Yue Tianxiang
收藏  |  浏览/下载:13/0  |  提交时间:2012/11/23
Scaling and analyzing the influence of fluid surface of fluid with nano-granular through speckle pattern experiment (EI CONFERENCE) 会议论文  OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies, July 8, 2007 - July 12, 2007, Chengdu, China
作者:  
Wang X.;  Wang Y.;  Wang Y.
收藏  |  浏览/下载:23/0  |  提交时间:2013/03/25
An optical system with double beam interference system was designed to measure the movement of nano-particles in fluid with laser speckle technology. In order to investigate the influence of the scattering light generated from liquid surface on speckle patterns  the liquid surface contour was dynamically detected by WYKO during nano-particle movement. The result demonstrates that the fluctuation of fluid surface is slight. Meanwhile  in order to further analyze this effect  a piece of ground glass was employed. The process of ground glass to be polished to optical glass was studied and tested continuously using WYKO and laser speckle technology. And then  the speckle patterns generated from kerosene fluid surface were studied. By contrast  the results show that  the fluid surface is transparent to the measurement wavelength. The influence of the surface of fluid can be neglected. Furthermore  the conclusion illustrates that laser speckle technique is an effective and reliable method to study the movement of nano-granular in fluid.  
Research on terrain representation error and average slope error estimation model of Beijing based on DEM 会议论文  OAI收割
Geoinformatics 2007: Geospatial Information Science, Nanjing, China, May 25, 2007 - May 27,2007
Li, Jing; Zhang, Chao; Tang, Quan; Li, Haixia
收藏  |  浏览/下载:8/0  |  提交时间:2014/12/07
Intelligent MRTD testing for thermal imaging system using ANN (EI CONFERENCE) 会议论文  OAI收割
ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China
Sun J.; Ma D.
收藏  |  浏览/下载:27/0  |  提交时间:2013/03/25
The Minimum Resolvable Temperature Difference (MRTD) is the most widely accepted figure for describing the performance of a thermal imaging system. Many models have been proposed to predict it. The MRTD testing is a psychophysical task  for which biases are unavoidable. It requires laboratory conditions such as normal air condition and a constant temperature. It also needs expensive measuring equipments and takes a considerable period of time. Especially when measuring imagers of the same type  the test is time consuming. So an automated and intelligent measurement method should be discussed. This paper adopts the concept of automated MRTD testing using boundary contour system and fuzzy ARTMAP  but uses different methods. It describes an Automated MRTD Testing procedure basing on Back-Propagation Network. Firstly  we use frame grabber to capture the 4-bar target image data. Then according to image gray scale  we segment the image to get 4-bar place and extract feature vector representing the image characteristic and human detection ability. These feature sets  along with known target visibility  are used to train the ANN (Artificial Neural Networks). Actually it is a nonlinear classification (of input dimensions) of the image series using ANN. Our task is to justify if image is resolvable or uncertainty. Then the trained ANN will emulate observer performance in determining MRTD. This method can reduce the uncertainties between observers and long time dependent factors by standardization. This paper will introduce the feature extraction algorithm  demonstrate the feasibility of the whole process and give the accuracy of MRTD measurement.  
Automatic building extraction from LIDAR point data in urban areas 会议论文  OAI收割
Geoinformatics 2006: Remotely Sensed Data and Information, Wuhan, China, October 28, 2006 - October 29,2006
Chengyi, Wang; Zhongming, Zhao
收藏  |  浏览/下载:14/0  |  提交时间:2014/12/07