中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
机构
采集方式
内容类型
发表日期
学科主题
筛选

浏览/检索结果: 共7条,第1-7条 帮助

条数/页: 排序方式:
Key point localization and recurrent neural network based water meter reading recognition 期刊论文  OAI收割
Displays, 2022, 卷号: 74, 期号: 2022, 页码: 0-0
作者:  
Jiguang Zhang;  Wenrui Liu;  Shibiao Xu;  Xiaopeng Zhang
  |  收藏  |  浏览/下载:35/0  |  提交时间:2022/05/06
From Point to Region: Accurate and Efficient Hierarchical Small Object Detection in Low-Resolution Remote Sensing Images 期刊论文  OAI收割
REMOTE SENSING, 2021, 卷号: 13, 期号: 13, 页码: 16
作者:  
Wu, Jingqian;  Xu, Shibiao
  |  收藏  |  浏览/下载:39/0  |  提交时间:2021/08/15
A hierarchical graph matching based method for large distance rover localization 会议论文  OAI收割
Takamatsu, Japan, 2017-8
作者:  
Yinlin Li;  Yuren Zhang;  Chuankai Liu;  Xu Yang;  Hong Qiao
  |  收藏  |  浏览/下载:40/0  |  提交时间:2018/10/09
关键点检测的线要素综合算法 期刊论文  OAI收割
中国图象图形学报, 2012, 卷号: 17, 期号: 2, 页码: 241-248
黄志坚; 张金芳; 徐帆江
  |  收藏  |  浏览/下载:12/0  |  提交时间:2012/11/12
Research on infrared dim-point target detection and tracking under sea-sky-line complex background (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
作者:  
Dong Y.-X.;  Zhang H.-B.;  Li Y.;  Li Y.;  Li Y.
收藏  |  浏览/下载:109/0  |  提交时间:2013/03/25
Target detection and tracking technology in infrared image is an important part of modern military defense system. Infrared dim-point targets detection and recognition under complex background is a difficulty and important strategic value and challenging research topic. The main objects that carrier-borne infrared vigilance system detected are sea-skimming aircrafts and missiles. Due to the characteristics of wide field of view of vigilance system  the target is usually under the sea clutter. Detection and recognition of the target will be taken great difficulties.There are some traditional point target detection algorithms  such as adaptive background prediction detecting method. When background has dispersion-decreasing structure  the traditional target detection algorithms would be more useful. But when the background has large gray gradient  such as sea-sky-line  sea waves etc.The bigger false-alarm rate will be taken in these local area.It could not obtain satisfactory results. Because dim-point target itself does not have obvious geometry or texture feature  in our opinion  from the perspective of mathematics  the detection of dim-point targets in image is about singular function analysis.And from the perspective image processing analysis  the judgment of isolated singularity in the image is key problem. The foregoing points for dim-point targets detection  its essence is a separation of target and background of different singularity characteristics.The image from infrared sensor usually accompanied by different kinds of noise. These external noises could be caused by the complicated background or from the sensor itself. The noise might affect target detection and tracking. Therefore  the purpose of the image preprocessing is to reduce the effects from noise  also to raise the SNR of image  and to increase the contrast of target and background. According to the low sea-skimming infrared flying small target characteristics  the median filter is used to eliminate noise  improve signal-to-noise ratio  then the multi-point multi-storey vertical Sobel algorithm will be used to detect the sea-sky-line  so that we can segment sea and sky in the image. Finally using centroid tracking method to capture and trace target. This method has been successfully used to trace target under the sea-sky complex background. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).  
a new method of line feature generalization based on shape characteristic analysis 期刊论文  OAI收割
METROLOGY AND MEASUREMENT SYSTEMS, 2011, 卷号: 18, 期号: 4, 页码: 597-605
Nie Hongshan; Huang Zhijian
  |  收藏  |  浏览/下载:16/0  |  提交时间:2013/10/08
Study of microsphere plate photomultiplier tube (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
作者:  
Wang X.;  Li Y.;  Li Y.;  Li Y.;  Li Y.
收藏  |  浏览/下载:30/0  |  提交时间:2013/03/25
The photomultiplier tube (PMT) that can work in different wavelength is an important detector device in remote sense technology. Microsphere plate using glass beads 50to 70m in diameter sintered together is the core component of the microsphere plate photomultiplier tube It is a novel two-dimension electron multiplier. The electrons gain for a single plate is about 1017 and do not have the phenomenon of ion-feedback. Furthermore the fabrication process is very easy. In this paper  much interest was put on the microsphere plate photomultiplier tube. Based on the analyses from the theory and the experiment result  we point out the key technology for fabricating PMT is how to obtain glass beads with narrow range in diameter and how to sinter the glass beads with a sufficient pylome. Factors affect the gradating technology and sintering process along with the solution to them is presented. In the last  the structure scheme and technological characteristic for fabricating microsphere plate photomultiplier tube were given. The pulse rising-time of MSP-PMT is below 400ps suitable to the detection of high-speed pulse. As easy to be fabricated and has great advantage over MCP multiplier in the ratio of performance to price  the microsphere plate photomultiplier tube is a promising dim-light detector.