Title :
An implementation of closed-loop optical image stabilization system for mobile camera
Author :
Seung-Kwon Lee ; Jin-Hyeung Kong
Abstract :
In this study, a new Closed-loop Optical Image Stabilization(OIS) system is developed for mobile camera. Gyro sensors, which are made by MEMS process, normally generate an accumulated error(drift) and escape the zero angle because of noise factor while it calculates the rotating angle. This research explores the new algorithm, utilizing DCF(Drift Compensation Filter) and BACF(Boot Angle Compensation Filter). RRF (Ringing Reduction Filter) PID controller is applied Feedforward control to reduce the actuator´s vibration by disturbance. OIS Actuator control performance than previous research has improved.
Keywords :
actuators; cameras; closed loop systems; feedforward; filtering theory; image processing; micromechanical devices; three-term control; BACF; DCF; MEMS process; OIS actuator control; OIS system; PID controller; RRF; actuator vibration; boot angle compensation filter; closed-loop optical image stabilization; drift compensation filter; feedforward control; gyro sensors; mobile camera; noise factor; ringing reduction filter; Adaptive optics; Mobile communication; Optical filters; Optical imaging; Optical sensors; Vibrations;
Conference_Titel :
Consumer Electronics (ICCE), 2014 IEEE International Conference on
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4799-1290-2
DOI :
10.1109/ICCE.2014.6775901
