OIS Actuator Compensation for Jello Effect Reduction
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Solution Overview
Problem
Camera devices, such as smartphones, experience the 'jello effect' due to limitations in stabilization system actuators, leading to distortion in images and videos, particularly when the camera is shaken.
Innovation Solution
A method and system that acquires an angular velocity signal, calculates angular displacement, generates a compensation value using adjusting filters, and controls the optical image stabilization (OIS) system to align the camera's optical axis, thereby reducing the jello effect by keeping the compensation value within the actuators' upper bound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the OIS system uses large compensation values to correct strong vibrations, then the camera alignment is improved, but the jello effect occurs due to actuator limitations
Solution Approach 1:
The patent applies dynamics by making the compensation value adaptive rather than static. The compensation value is dynamically adjusted based on the detected vibration characteristics (amplitude and frequency), allowing the system to optimize correction effectiveness while avoiding the jello effect. The control component modifies compensation parameters in real-time according to actual vibration conditions.
Solution Approach 2:
The patent changes parameters by adjusting compensation values based on vibration amplitude and frequency characteristics. The system modifies the compensation parameter magnitude and timing according to the detected vibration profile, transforming a fixed compensation approach into a variable one that adapts to different vibration scenarios, thereby preventing actuator saturation and jello effect.
2Stability of the object's composition
If the OIS system applies strong compensation for heavy vibrations, then image stability is improved, but distortion occurs due to actuator saturation
Solution Approach 1:
The system dynamically adjusts compensation strength based on real-time vibration detection. Rather than applying constant strong compensation, the system modulates the compensation magnitude according to actual vibration intensity, maintaining image stability during moderate vibrations while avoiding actuator saturation during extreme vibrations that would cause distortion.
Solution Approach 2:
The patent implements feedback by continuously monitoring vibration characteristics and using this information to adjust compensation values. The detection component provides real-time feedback on vibration amplitude and frequency, which the control component uses to optimize compensation parameters, ensuring image stability is maintained without exceeding actuator capabilities.
Data Source
AI summary
A method includes acquiring an angular velocity signal, calculating an angular displacement according to the angular velocity signal, generating a compensation value according to a frequency corresponding to the angular velocity signal and the angular displacement, and controlling an optical image stabilization (OIS) system to align an optical axis of a camera of the camera device according to the compensation value.