Dynamic Camera Shake Correction Switching for Lens Centering
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Solution Overview
Problem
Existing camera shake correction methods face challenges when in-plane correction is performed by optical camera shake correction and inter-plane correction by electronic camera shake correction, particularly with long exposure times, where accurate compensation of remaining balance is difficult due to limitations in real-time control and dynamic feedback, leading to poor correction performance.
Innovation Solution
An image stabilization device and method that dynamically adjust camera shake correction processing by performing optical camera shake correction as in-plane correction during exposure time and electronic camera shake correction as inter-plane correction, with a centering operation in the period other than exposure time, and switching to alternative processing when centering is not feasible due to exposure time constraints, utilizing gyro sensor data and Hall element feedback for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If optical camera shake correction is performed as in-plane correction during exposure time, then in-plane blur reduction is improved, but centering operation cannot be completed in long exposure conditions
Solution Approach 1:
The system dynamically switches between two correction modes based on exposure time conditions: optical camera shake correction for in-plane correction during normal exposure, and electronic camera shake correction when exposure time is long and centering operation cannot be completed. This dynamic adaptation resolves the contradiction by selecting the appropriate correction method based on real-time exposure conditions.
Solution Approach 2:
The system changes the correction parameter (switching between optical and electronic correction methods) based on exposure time conditions. When exposure time exceeds a threshold, the system transitions from optical correction to electronic correction, allowing centering operation to be skipped while maintaining overall correction effectiveness.
2Adaptability or versatility
If electronic camera shake correction is performed as inter-plane correction, then correction flexibility is improved, but accurate compensation of remaining balance is difficult due to real-time control limitations
Solution Approach 1:
The correction process is segmented into two distinct phases: in-plane correction during exposure time using optical methods, and inter-plane correction in the period other than exposure time using electronic methods. This segmentation allows each method to operate in its optimal condition, with optical correction handling high-precision in-plane adjustments and electronic correction handling inter-plane adjustments.
Solution Approach 2:
The system performs in-plane correction by optical camera shake correction before the exposure is complete, preparing the image stabilization in advance. This preliminary action ensures that when electronic correction is needed for inter-plane adjustment, the foundation is already established, improving overall compensation accuracy.
3Speed
If optical camera shake correction is used for in-plane correction, then real-time correction performance is improved, but correction performance deteriorates when centering operation cannot be completed
Solution Approach 1:
The system uses feedback from exposure time conditions to determine the appropriate correction method. When the exposure time is long and centering operation cannot be completed, the system detects this condition and switches to electronic camera shake correction, ensuring reliable correction performance under varying conditions.
Solution Approach 2:
The image stabilization device incorporates both optical and electronic camera shake correction capabilities, making it universal and adaptable to different exposure conditions. This multi-functionality ensures that the system can maintain reliable correction performance whether centering operation can be completed or not, by selecting the appropriate correction method for each condition.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables effective camera shake correction across varying exposure times, ensuring optimal in-plane blur reduction and suppression of rolling shutter distortion, even in low-light conditions with extended exposure, particularly effective in imaging modes with frame rates below 60 fps.
Implementation Method 1
there is also shown a Hall element 145 for detecting a position of the vibration-proof lens 112
Data Source
AI summary
There is provided an image stabilization device including: a control unit configured to perform first camera shake correction processing based on an optical camera shake correction method using a lens and second camera shake correction processing based on an electronic camera shake correction method of cutting out a captured image.