Image Stabilization Control Apparatus Focal Length Task Allocation
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Solution Overview
Problem
Image stabilization systems using multiple devices for optical and imager image stabilization methods face challenges due to phase lag and down sampling caused by communication delays, leading to suboptimal correction results when devices cooperate via inter-device communication.
Innovation Solution
An image stabilization control apparatus that assigns correction tasks based on focal length, using either the optical or imager image stabilization method, or both, to minimize phase differences by determining the appropriate device for each correction task, thereby reducing the need for inter-device communication and enhancing stabilization performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple devices cooperate via inter-device communication for image stabilization, then comprehensive shake correction is achieved, but phase lag occurs due to communication delay
Solution Approach 1:
The patent combines the image stabilization functions of multiple devices (lens device and camera body) into a unified control system. The control apparatus integrates shake detection data and focal length information from both devices, then centrally determines correction task allocation. This merging eliminates the need for continuous inter-device communication during stabilization operations, thereby preventing phase lag while maintaining comprehensive correction capability.
2Reliability
If correction tasks are assigned to multiple devices, then better image stabilization performance is achieved, but device complexity increases
Solution Approach 1:
The patent segments the image stabilization function into distinct correction tasks based on focal length conditions. The control apparatus divides the correction workload by determining which device (lens or camera body) should handle correction at specific focal lengths. This segmentation allows the system to achieve comprehensive stabilization performance while managing complexity through clear task division rather than simultaneous multi-device operation.
Solution Approach 2:
The control apparatus serves multiple functions: it detects shake, acquires focal length information, determines correction task allocation, and controls both the lens device and camera body. By creating a universal control system that handles all these functions, the patent reduces overall system complexity despite utilizing multiple stabilization devices, as the centralized control eliminates the need for distributed decision-making logic in each device.
3Reliability
If inter-device communication is used for correction task coordination, then cooperative stabilization is achieved, but down sampling occurs due to control cycle differences
Solution Approach 1:
The control apparatus performs preliminary determination of correction task allocation based on focal length conditions before actual stabilization operations begin. By pre-establishing which device will handle correction at specific focal lengths, the system eliminates the need for real-time coordination communication during control cycles. This preliminary action ensures precise control synchronization without down sampling, as each device operates independently according to pre-determined assignments.
Data Source
AI summary
An image stabilization control apparatus that causes a first correction unit included in a first device and a second correction unit included in a second device that is able to communicate with the first device, to cooperate with each other so as to correct, when image capturing is performed, an influence of shake of these device on image capturing. The apparatus acquires information regarding a shake and a focal length related to the image capturing and assigns a correction task, which is the task of performing correction regarding an influence of shake, to the first correction unit and the second correction unit, based on the information regarding the acquired focal length. The apparatus assigns the correction task to only one of the first correction unit and the second correction unit when the focal length satisfies a predetermined condition.