Optical image stabilizing system using fuzzy sliding-mode controller for digital cameras

Author

Li, Tzuu-Hseng S. ; Chen, Ching-Chang ; Su, Yu-Te

Author_Institution

Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan

Volume

58

Issue

2

fYear

2012

fDate

5/1/2012 12:00:00 AM

Firstpage

237

Lastpage

245

Abstract

An optical image stabilizing (OIS) system using fuzzy sliding-mode controller (FSMC) is presented in this research. The OIS system shifts the image sensor to correct the deviation from the optical path caused by a user´s handshake vibration. The voice coil motors (VCM) was adopted to drive the OIS module which bears the image sensor, a gyroscope was used to detect the hand-shake vibration, and two single-axis hall sensors were designed to sense the position of the VCM actuators. The proposed FSMC overcomes the nonlinear, hysteresis, and time-varying properties of the VCM actuator efficiently. The stabilizing performance was demonstrated by digital photographs taken under different test conditions.

Keywords

actuators; cameras; fuzzy control; gyroscopes; image sensors; variable structure systems; VCM actuators; digital cameras; digital photographs; fuzzy sliding-mode controller; gyroscope; hand-shake vibration; image sensor; optical image stabilizing system; single-axis hall sensors; voice coil motors; Actuators; Image sensors; Microcontrollers; Optical imaging; Optical sensors; Vibrations; fuzzy sliding-mode controller; optical image stabilizing; voice coil motor;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/TCE.2012.6227418

Filename

6227418