Hybrid Image Stabilization Control for Lens Range and Shading
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Solution Overview
Problem
Existing imaging apparatuses using optical and electronic image stabilization have limitations in the range of correction they can provide, with optical stabilization being mechanically limited and electronic stabilization reducing the angle of field as surplus pixels increase.
Innovation Solution
An imaging apparatus that combines optical and electronic image stabilization, where the control unit adjusts the moveable range of the optical correction unit to enhance the stabilization effect by using electronic image stabilization, thereby enlarging the range of optical image stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical image stabilization is used to correct image shake, then image stabilization effect is improved, but the mechanical driving range is limited and shading occurs in captured image
Solution Approach 1:
The patent combines optical image stabilization (driving imaging lens to correct shake) with electronic image stabilization (excising and repositioning image regions) to create a hybrid stabilization system. The control unit coordinates both correction mechanisms, allowing the imaging lens to operate within an enlarged moveable range while electronic correction handles additional shake compensation, thereby improving overall stabilization effect without exceeding mechanical limits that cause shading
Solution Approach 2:
The control unit dynamically adjusts the moveable range of the imaging lens based on detection results from the shake detection unit. When electronic image stabilization is active, the control unit permits the imaging lens to move beyond its normal mechanical limits (within safe boundaries) to maximize optical correction effectiveness, while coordinating with electronic correction to prevent shading and maintain image quality
2Reliability
If electronic image stabilization is used to correct image shake, then correction range is increased, but the angle of field of output image is reduced due to surplus pixels
Solution Approach 1:
The patent merges optical image stabilization with electronic image stabilization in a coordinated system. The optical component corrects shake by moving the imaging lens within an enlarged moveable range, while the electronic component performs excision and repositioning. This combination allows the system to achieve broader correction range than electronic stabilization alone, while the optical component compensates for the angle of field reduction by providing additional correction capability
3Reliability
If the moveable range of optical correction unit is increased to enhance stabilization, then image stabilization effect is improved, but shading may occur in captured image
Solution Approach 1:
The control unit continuously receives feedback from the shake detection unit about image shake conditions and adjusts the moveable range of the imaging lens accordingly. When electronic image stabilization is active, the control unit permits enlarged moveable range with coordinated electronic correction to prevent shading. This feedback mechanism ensures the system maintains optimal stabilization effect while dynamically preventing shading by adjusting the balance between optical and electronic correction based on real-time shake detection
Solution Approach 2:
The system dynamically adjusts the moveable range of the imaging lens based on operational conditions. When electronic image stabilization is not used, the imaging lens operates within normal mechanical limits to avoid shading. When electronic stabilization is active, the control unit dynamically expands the permitted moveable range of the imaging lens while coordinating with electronic correction to compensate for potential shading, thereby enhancing stabilization effect adaptively
Data Source
AI summary
An imaging apparatus includes an imaging unit configured to image an image within a first range on an imaging surface, a first correction unit configured to optically compensate for image shake on the image surface resulting from shake of a device, a second correction unit configured to electronically correct image shake on the image surface resulting from shake of the imaging apparatus, and output an image from a second range that is narrower than the first range, and a control unit configured to determine the moveable range of the first correction unit. The control unit performs control to increase the moveable range of the first correction unit when the second correction unit is used in comparison to when the second correction unit is not used.