Share Email Print
cover

Proceedings Paper

Novel auto-focusing method
Author(s): Yan Huang; Dong Ye; Rensheng Che
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

In this paper, an advanced auto-focusing method is proposed to improve the efficiency of the traditional auto-focusing method based on criterion function with the same accuracy. Firstly, a depth from defocus auto-focusing method based on autocorrelation of differential image is used to give a rough estimate of the right focus position with only two or three defocused images. Then traditional method based on criterion function is used to find accurate focus position in this rough field with fixed step-length mountain climbing servo (MCS). The experimental results demonstrate that this novel method not only maintains the accuracy, but also has some advantages of rapid reaction and good performance for any objects.

Paper Details

Date Published: 11 October 2010
PDF: 7 pages
Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 765674 (11 October 2010); doi: 10.1117/12.866611
Show Author Affiliations
Yan Huang, Harbin Institute of Technology (China)
Dong Ye, Harbin Institute of Technology (China)
Rensheng Che, Harbin Institute of Technology (China)


Published in SPIE Proceedings Vol. 7656:
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Yudong Zhang; Jose M. Sasian; Libin Xiang; Sandy To, Editor(s)

© SPIE. Terms of Use
Back to Top