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长春光学精密机械与物... [4]
光电技术研究所 [2]
深海科学与工程研究所 [1]
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OAI收割 [7]
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期刊论文 [4]
会议论文 [3]
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Location of Static Targets on the Seabed: A Study
期刊论文
OAI收割
JOURNAL OF INTERNET TECHNOLOGY, 2020, 卷号: 21, 期号: 5, 页码: 1563-1569
作者:
Yao, Biyuan
;
Cao, Xinghui
;
Shen, Binjian
;
Li, Guiqing
;
Yin, Jianhua
  |  
收藏
  |  
浏览/下载:30/0
  |  
提交时间:2020/12/17
Static target
Weighted centroid localization algorithm
Least square localization algorithm
Positioning error
Geometric correction for TanSat atmospheric carbon dioxide grating spectrometer
期刊论文
OAI收割
Sensors and Actuators a-Physical, 2019, 卷号: 293, 页码: 62-69
作者:
H.Zhang
;
Y.Q.Zheng
;
S.Li
;
C.Lin
;
C.L.Li
  |  
收藏
  |  
浏览/下载:37/0
  |  
提交时间:2020/08/24
Geometric correction,Centroid position,Deflection error,spectral calibration,optical-system,design,Engineering,Instruments & Instrumentation
Centroid localization algorithm based on bicubic interpolation gray square weighted (EI CONFERENCE)
会议论文
OAI收割
2012 3rd International Conference on Advances in Materials and Manufacturing Processes, ICAMMP 2012, December 22, 2012 - December 23, 2012, Beihai, China
作者:
Zhou J.
收藏
  |  
浏览/下载:158/0
  |  
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.
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:30/0
  |  
提交时间:2015/09/21
adaptive optics
electron multiplying charge-coupled devices
wave-front sensor
centroid detecting error
Research on automatic Hartmann test of membrane mirror (EI CONFERENCE)
会议论文
OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China
作者:
Zhang P.
收藏
  |  
浏览/下载:41/0
  |  
提交时间:2013/03/25
Electrostatic membrane mirror is ultra-lightweight and easy to acquire a large diameter comparing with traditional optical elements
so its development and usage is the trend of future large mirrors. In order to research the control method of the static stretching membrane mirror
the surface configuration must be tested. However
membrane mirror's shape is always changed by variable voltages on the electrodes
and the optical properties of membrane materials using in our experiment are poor
so it is difficult to test membrane mirror by interferometer and null compensator method. To solve this problem
an automatic optical test procedure for membrane mirror is designed based on Hartmann screen method. The optical path includes point light source
CCD camera
splitter and diffuse transmittance screen. The spots' positions on the diffuse transmittance screen are pictured by CCD camera connected with computer
and image segmentation and centroid solving is auto processed. The CCD camera's lens distortion is measured
and fixing coefficients are given to eliminate the spots' positions recording error caused by lens distortion. To process the low sampling Hartmann test results
Zernike polynomial fitting method is applied to smooth the wave front. So low frequency error of the membrane mirror can be measured then. Errors affecting the test accuracy are also analyzed in this paper. The method proposed in this paper provides a reference for surface shape detection in membrane mirror research. 2010 Copyright SPIE - The International Society for Optical Engineering.
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:27/0
  |  
提交时间:2015/09/21
centroid error
non-uniformity
sensitivity
adaptive optics
Active pixel sensor geometrical characteristic effects on star image subdivided locating accuracy for star tracker (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:
Liu J.
;
Liu J.
;
Liu J.
收藏
  |  
浏览/下载:30/0
  |  
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.