OIS EIS Image Stabilization Feedback Loop
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Solution Overview
Problem
Existing image stabilization technologies, such as OIS and EIS, when combined, often result in overcompensation during image processing, leading to poor image stability due to the lack of association between the two systems' compensation processes.
Innovation Solution
The proposed method involves a terminal device equipped with a motion sensor, OIS controller, EIS controller, and image sensor, where the OIS controller moves the lens based on motion data to stabilize the optical path, and the EIS controller performs jitter compensation using movement information from the OIS controller, thereby avoiding overcompensation by considering the lens movement during image sequence collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If OIS technology and EIS technology are directly combined to perform image compensation, then image stabilization is enhanced, but overcompensation occurs leading to poor image stability
Solution Approach 1:
The patent implements feedback by having the EIS controller receive movement information from the OIS controller and use it to adjust its compensation amount. The EIS controller calculates a second compensation amount based on both motion sensor data and the actual lens movement data from OIS, creating a closed-loop system that prevents overcompensation and improves image stability
Solution Approach 2:
The patent introduces movement information of the lens as an intermediary element that mediates between the OIS and EIS systems. This intermediary data allows the EIS controller to understand the actual optical path changes and adjust its electronic compensation accordingly, preventing the overcompensation that occurs when systems operate independently
2Stability of the object's composition
If OIS controller moves the lens based on motion data, then optical path stability is improved, but the EIS controller cannot account for lens movement causing overcompensation
Solution Approach 1:
The patent applies preliminary action by having the OIS controller send movement information to the EIS controller before the EIS controller performs its compensation calculation. This allows the EIS controller to pre-adjust its compensation strategy based on the known lens movement, preventing overcompensation before it occurs
Solution Approach 2:
The system establishes feedback by routing lens movement information from the OIS controller to the EIS controller. This feedback loop ensures that the EIS controller has real-time information about optical path changes and can adjust its compensation accordingly, preventing information loss and overcompensation
Data Source
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AI summary
Embodiments of this application provide an image obtaining method and a terminal device. When the terminal device moves, a motion sensor collects motion data of the terminal device, and sends the motion data to an optical image stabilization OIS controller and an electronic image stabilization EIS controller, where the terminal device includes the motion sensor, the OIS controller, the EIS controller, and an image sensor. The OIS controller controls, based on the motion data, a lens of the terminal device to move. The image sensor collects an image sequence. The EIS controller performs, by using movement information of the lens and the motion data, jitter compensation on the image sequence collected by the image sensor, so that stability of an obtained image can be improved.