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Optical image stabilizing system using multirate fuzzy PID controller for mobile device camera

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4 Author(s)
Hyung Jin Chang ; Sch. of Electr. Eng. & Comput. Sci., ASRI Seoul Nat. Univ., Seoul, South Korea ; Pyo Jae Kim ; Dong Sung Song ; Jin-Young Choi

A new optical image stabilizing system for a small mobile device camera is presented. A gyro sensor is used to detect the amount of shaking, and a charge-coupled device (CCD) is shifted to correct the deviated optical axis using a voice coil motor (VCM). Because the VCM is nonlinear, unstable, and time-varying, a new adaptive control technique--multirate fuzzy PID control - is proposed. Our new method is capable of providing improved control with low power consumption. We show clear, stabilized results for a variety of digital photographs taken under conditions of vibration.

Published in:

Consumer Electronics, IEEE Transactions on  (Volume:55 ,  Issue: 2 )