A Method of Auto-Focusing Based on Fuzzy-Control

Abstract:

This paper introduces a method of auto focusing based on fuzzy-control. Using this method, we design the scheme of optimization for focus. Variance function is used as approximately evaluate function for a large-scale in this system, and Square-gradient function is used as precise evaluate function in certain scale. Fuzzy-control is adopted the control of optimization for focus. The experiment testified that auto-focusing in this system is so accurate that accord with the required precision, and the image of collecting is clear. The machine of auto-focusing is simple, and the control of whole system is easy to implement.

• Periodical: Key Engineering Materials (Volumes 392-394)
• Pages: 493-496
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.392-394.493
• Online since: October 2008
• Authors: Dong Xiang Shao, Guang Lin Wang, T.Z. Cui, H.C. Zhu
• Keywords: Auto Focusing, Charge Coupled Devices (CCD), Focus Optimization, Fuzzy Control

References

[1] H.C. Zhu: The two aspect technology of spinneret holder and spinneret orifice micro measure study ( MS., Harbin Institute of Technology, China 2003).

[2] S.Y. Li: Fuzzy control nerve network control and intelligence control theory (Harbin Institude of Technology, China 1998).