中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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Adaptive quasi-Monte Carlo method for uncertainty evaluation in centroid measurement of planetary rovers 期刊论文  OAI收割
Transactions of the Institute of Measurement and Control, 2021, 卷号: 43, 期号: 3, 页码: 623-634
作者:  
Na Q(那强);  Hu SR(胡淑荣);  Tao JG(陶建国);  Luo Y(罗阳)
  |  收藏  |  浏览/下载:42/0  |  提交时间:2020/09/26
Self-centralized jointly sparse maximum margin criterion for robust dimensionality reduction 期刊论文  OAI收割
KNOWLEDGE-BASED SYSTEMS, 2020, 卷号: 206, 页码: 15
作者:  
Hu, Liangchen;  Xu, Jingke;  Tian, Lei;  Zhang, Wensheng
  |  收藏  |  浏览/下载:36/0  |  提交时间:2021/01/07
Centroid-aware local discriminative metric learning in speaker verification 期刊论文  OAI收割
PATTERN RECOGNITION, 2017, 卷号: 72, 期号: 72, 页码: 176-185
作者:  
Sheng, Kekai;  Dong, Weiming;  Li, Wei;  Razik, Joseph;  Huang, Feiyue
  |  收藏  |  浏览/下载:43/0  |  提交时间:2018/01/02
An optimization method for improving the accuracy of centroid computation based on Shack-Hartmann wavefront sensor 会议论文  OAI收割
作者:  
Xiaoyu Zhang [1,2,3], Caixia Wang[1,2]
  |  收藏  |  浏览/下载:20/0  |  提交时间:2018/12/20
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:111/0  |  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).  
The detection error analysis of Hartmann-Shack wavefront sensor based on electron multiplying charge-coupled devices 期刊论文  OAI收割
ACTA PHYSICA SINICA, 2010, 卷号: 59, 期号: 8, 页码: 5904-5913
作者:  
Zhang Yan-Yan;  Rao Chang-Hui;  Li Mei;  Ma Xiao-Yu
收藏  |  浏览/下载:28/0  |  提交时间:2015/09/21
Accuracy analysis of centroid calculated by a modified center detection algorithm for Shack-Hartmann wavefront sensor 期刊论文  OAI收割
OPTICS COMMUNICATIONS, 2008, 卷号: 281, 期号: 4, 页码: 750-755
作者:  
Li, Huaqlang;  Song, Helun;  Rao, Changhui;  Rao, Xuejun
收藏  |  浏览/下载:24/0  |  提交时间:2015/09/21
Centroid error analysis of Shack-Hartmann wave-front sensor induced by the sensitivity non-uniformity 期刊论文  OAI收割
JOURNAL OF MODERN OPTICS, 2008, 卷号: 55, 期号: 11, 页码: 1739-1748
作者:  
Li, Huaqiang;  Song, Helun;  Rao, Xuejun;  Rao, Changhui
收藏  |  浏览/下载:24/0  |  提交时间:2015/09/21