Motor-Driven Image Capture Module for Hybrid OIS-EIS Stabilization
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Solution Overview
Problem
Existing image capture methods in mobile terminals suffer from insufficient optical image stabilization, leading to continuous drift of the image capture module away from the optical center and loss of image resolution due to reliance on single electronic image stabilization.
Innovation Solution
A method and apparatus that combines optical and electronic image stabilization by controlling the image capture module's position using a driving motor, cropping captured images when necessary, and performing optical stabilization once the module returns to a preset position, maximizing the stabilization space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If only one optical image stabilization method is used to control the image capture module position, then the optical center remains fixed, but the image capture module continuously drifts away from the optical center and can move only within a limited space
Solution Approach 1:
The patent combines optical image stabilization (OIS) with electronic image stabilization (EIS) to form a hybrid stabilization system. The OIS component uses a driving motor to physically stabilize the image capture module, while the EIS component processes the captured image to compensate for remaining instability. This merging allows the system to maintain the optical center stability of OIS while gaining the extended movement space capability of EIS, resolving the contradiction between fixed optical center and limited movement space.
2Manufacturing precision
If cropping captured images by using only one electronic image stabilization method is used to keep the optical center fixed, then the optical center remains stable, but much resolution of an image frame is lost
Solution Approach 1:
The patent merges optical image stabilization with electronic image stabilization in a hybrid approach. The OIS portion physically maintains the optical center stability through motor-driven positioning, while the EIS portion performs minimal cropping only when necessary to correct residual instability. This combination significantly reduces the resolution loss compared to using EIS alone, as the physical stabilization handles the majority of the correction burden.
Solution Approach 2:
The patent replaces purely electronic image stabilization (which relies on cropping and digital processing) with a hybrid system that incorporates mechanical/optical stabilization through a driving motor. This substitution reduces dependence on aggressive cropping methods, thereby preserving more of the original image resolution while maintaining optical center stability.
3Ease of operation
If the image capture module is allowed to move freely during hand shaking, then the module can compensate for vibration, but the position center shifts from the initial optical center and the image becomes blurry
Solution Approach 1:
The patent implements a feedback control mechanism where the system continuously monitors the position of the image capture module and the actual image stability, then adjusts the motor-driven positioning accordingly. The feedback loop ensures that while the module is allowed to move to compensate for vibration, it remains constrained within acceptable positional boundaries to prevent blurriness and maintain optical center accuracy.
Solution Approach 2:
The patent dynamically adjusts positioning parameters and stabilization thresholds based on detected vibration levels and module position. By changing these parameters in real-time, the system optimizes the balance between allowing sufficient movement for vibration compensation and maintaining position accuracy to prevent image blurriness.
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 ensures the optical center remains unchanged, minimizing image resolution loss while effectively stabilizing images by allowing the image capture module to move within a larger space during optical stabilization.
Implementation Method 1
controlling a driving motor to drive the image capture module to move from the first position to the preset second position
Data Source
AI summary
This application discloses an image capture method and apparatus, a mobile terminal, and a storage medium, and specifically relates to the field of electronic devices. A driving motor is controlled to drive the image capture module to move from the first position to the preset second position; an angular velocity signal, a captured next frame image, and the first position of the image capture module are received during a capture period of the next frame image of the image capture; the captured next frame image is cropped according to the first position, the preset second position, the angular velocity signal, and a preset electronic image stabilization algorithm; and the driving motor is controlled, based on the angular velocity signal and the first position of the image capture module, to perform an optical image stabilization operation.