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北京航空航天大学 [2]
长春光学精密机械与物... [2]
西安交通大学 [1]
新疆理化技术研究所 [1]
武汉植物园 [1]
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期刊论文 [3]
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Resolving Horizontal Rupture Directivity of Moderate Crustal Earthquake in Sparse Network With Ambient Noise Location
期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2018, 卷号: 123, 期号: 1, 页码: 533-552
作者:
He, X.
;
Ni, S.
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  |  
浏览/下载:19/0
  |  
提交时间:2018/12/29
rupture directivity
ambient noise
centroid location
sparse network
Distributed Parallel Super-Block-Based Star Detection and Centroid Calculation
会议论文
IEEE SENSORS JOURNAL, 2018-10-01
作者:
Wang, Zhen
;
Jiang, Jie
;
Zhang, Guangjun
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  |  
浏览/下载:7/0
  |  
提交时间:2019/12/30
Distributed parallel
star detection
centroid location
star tracker
distributed shared memory
image sensors application
Distributed Parallel Super-Block-Based Star Detection and Centroid Calculation
期刊论文
IEEE SENSORS JOURNAL, 2018, 卷号: 18, 页码: 8096-8107
作者:
Wang, Zhen
;
Jiang, Jie
;
Zhang, Guangjun
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  |  
浏览/下载:3/0
  |  
提交时间:2019/12/30
Distributed parallel
star detection
centroid location
star tracker
distributed shared memory
image sensors application
Centroid localization algorithm based on bicubic interpolation gray square weighted (EI CONFERENCE)
会议论文
2012 3rd International Conference on Advances in Materials and Manufacturing Processes, ICAMMP 2012, December 22, 2012 - December 23, 2012, Beihai, China
Zhou J.
;
Chen X.-L.
;
Li S.-J.
;
Huang D.-Y.
;
Ma G.-Z.
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  |  
浏览/下载:143/0
  |  
提交时间:2013/03/25
The 3D coordinates of measured point is embodied in 2D image coordinate of the optical characteristic point via the visual measurement system. Based on the gray square weighted centroid localization algorithm
the paper presents bicubic interpolation gray square weighted centroid localization algorithm
increases the number of effective pixels around the optical characteristic point imaging center
and reduces noise error via the gray square weighted
improves the imaging center location accuracy of optical characteristic point
realizes the accurate location of the optical characteristic points. Results indicate application of the proposed algorithm to location
the standard tolerance along the direction of x is 0.0022 Pixel
the standard tolerance along the direction of y is 0.0023 Pixel
compared with the others
the standard tolerance is minimum and discrete to a lesser degree distancing ideal image point
that is
the proposed algorithm has higher location accuracy. The maximum tolerance along the direction of x is 0.008 Pixel
the one along the direction of y is 0.007 Pixel
compared with the other two algorithms
the maximum tolerance is minimum.Results indicate that the stability of the proposed algorithm is better. (2013) Trans Tech Publications
Switzerland.
ZigBee indoor positioning system precision parameter study based on BP neural network
会议论文
International Conference on Computer, Networks and Communication Engineering (ICCNCE), Beijing, PEOPLES R CHINA, MAY 23-24, 2013
Zeng Wenxiao
;
Wang Yanen
;
Wang Meng
;
Guo Ye
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  |  
浏览/下载:19/0
  |  
提交时间:2014/11/10
CC2431
Zigbee location
BP Neural Network
Euclidian distance centroid algorithm
multi-target detection indoor
An improved weighted centroid location algorithm
期刊论文
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University, 2010, 卷号: 44, 期号: [db:dc_citation_issue], 页码: 1-4
作者:
Yang, Xinyu
;
Kong, Qingru
;
Dai, Xiangjun
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  |  
浏览/下载:3/0
  |  
提交时间:2019/12/10
Anchor nodes
Centroid
Location algorithms
Location precision
Real systems
Received signal strength indication
Signal strengths
Weighted centroid
Active pixel sensor geometrical characteristic effects on star image subdivided locating accuracy for star tracker (EI CONFERENCE)
会议论文
ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China
Li J.
;
Liu J.
;
Hao Z.
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  |  
浏览/下载:22/0
  |  
提交时间:2013/03/25
Active pixel sensor (APS) star tracker becomes an investigated hotspot because of its technical advantages. And centroid algorithm is a subpixel method proper to star position calculation because of its high accuracy and simplicity. When centroid algorithm is applied on APS star tracker
APS pixel geometrical characteristics might effect on star image position accuracy. Because the amplifier circuit and other function circuits inter pixel of APS take up some pixel area
the Fill Factor is less than 100%. Moreover
the active sensitive area has a certain geometrical shape
such as square
rectangle and L shape. The Fill Factor of pixel influences on star image subdivided locating accuracy when using centioid algorithm. In this paper
we have analyzed all pixel geometrical characteristics influence on the star position accuracy. From simulation experiments
we can conclude that Fill factor and pixel geometric shape influence on star position accuracy. The star locating error increased when Fill Factor decreased
and different geometrical shape of active sensitive area of pixel can make different influence on star location accuracy
the symmetrical sensitive area in x or y axis have symmetrical location error in the same axis.
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