APPLICATION OF SUB-PIXEL DIVISION IN OBSERVATION OF
OPTICAL AUTOCOLLIMATION SYSTEM
Key Laboratory of Earthquake Geodesy,Institute of Seismology,CEA,Wuhan 430071
Abstract An observation method of optical autocollimation system based on CCD is proposed and the image processing method is introduced.At first,autothreshold segmentation is used to detect the pixel edge of reticle.Then,the integral method is used to locate the pixel edge of reticle.The following processing is cubic polynomial fitting which fit the image edge to implement subpixel localization.Finally,straight line fitting is applied and the center of reticle is obtained.The experiment results show that the subpixel division can detect the subpixel edge of reticle precisely.
Key words :
edge detection
sub-pixel division
auto-threshold segmentation
integral method
polynomial fitting
Received: 02 July 2013
Published: 24 October 2013
Cite this article:
Zhang Yi,Lu Jie,Shi Yuhui et al. APPLICATION OF SUB-PIXEL DIVISION IN OBSERVATION OF
OPTICAL AUTOCOLLIMATION SYSTEM[J]. jgg, 2013, 33(Supp.2): 100-102.
Zhang Yi,Lu Jie,Shi Yuhui et al. APPLICATION OF SUB-PIXEL DIVISION IN OBSERVATION OF
OPTICAL AUTOCOLLIMATION SYSTEM[J]. jgg, 2013, 33(Supp.2): 100-102.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2013/V33/ISupp.2/100
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