Share Email Print
cover

Proceedings Paper

Research on auto-focusing of high signal to noise ratio image with weak light
Author(s): Hao-yu Yuan; Wen-feng Wang; Jun Tang; Feng-dong Chen; Fu-peng Wei; Guo-dong Liu; Zhi-tao Peng
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

For souped-up of Optical Damage Online Inspection system and obtain damage information of the optic exactly, this paper describes an auto focusing method for weak spot which on high signal to noise ratio image in darkroom. We used different calculation strategy to target pixel and adjoining pixel, compute the gray different that on x and y, compared the result of two focusing evaluation function which the gray difference absolute sum function and the gray difference quadratic sum function, select the best calculation strategy and focusing evaluation function. Test results indicate that, the gray difference quadratic sum function can be more exactly in darkroom and under weak light

Paper Details

Date Published: 3 February 2015
PDF: 7 pages
Proc. SPIE 9255, XX International Symposium on High-Power Laser Systems and Applications 2014, 92554C (3 February 2015); doi: 10.1117/12.2065090
Show Author Affiliations
Hao-yu Yuan, China Academy of Engineering Physics (China)
Wen-feng Wang, Harbin Institute of Technology (China)
Jun Tang, China Academy of Engineering Physics (China)
Feng-dong Chen, Harbin Institute of Technology (China)
Fu-peng Wei, Harbin Institute of Technology (China)
Guo-dong Liu, Harbin Institute of Technology (China)
Zhi-tao Peng, China Academy of Engineering Physics (China)


Published in SPIE Proceedings Vol. 9255:
XX International Symposium on High-Power Laser Systems and Applications 2014
Chun Tang; Shu Chen; Xiaolin Tang, Editor(s)

© SPIE. Terms of Use
Back to Top