Patent ID: 8436908
Filing Date: 2013-05-07
Classification: G02B,G03B,H04N

Abstract:
1. An optical image stabilization system for a camera having an optical system including an actuator and a motion compensating optical element driven by the actuator, the system comprising: a motion sensor configured to provide a motion signal; a frequency detector configured to detect a dominant frequency, the dominant frequency being a frequency of the motion signal producing a threshold amount of motion blurring in an image produced by the camera; a tunable high-pass filter configured to filter the motion signal and to supply the filtered motion signal as an actuator control signal; and a module configured to weight detected motion frequencies based upon an exposure time, higher frequencies being weighted inversely to the exposure time; said tunable high pass filter being configured to be tuned based upon the dominant frequency and to provide a phase lead substantially canceling a phase lag of the actuator at the dominant frequency.