Lens Apparatus Image Stabilization Control Reducing Communication Time Lag
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Solution Overview
Problem
Existing image stabilization systems in camera lenses face accuracy deterioration due to time lags in lens communication, making it difficult to acquire current lens information and perform tuning suitable for each lens, especially during zooming operations.
Innovation Solution
The system improves image stabilization control by reducing time lag in lens communication through independent generation and transmission of motion information by both the camera and lens units, using reliability information and focal length data to enhance control precision and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If motion information is transmitted from camera main body to lens unit through lens communication, then image stabilization control can be performed, but accuracy deteriorates due to time lag in acquiring current lens information
Solution Approach 1:
The camera main body generates and transmits motion information in advance based on its own motion detection, without waiting for lens unit information. This preliminary action eliminates the time lag caused by sequential communication, as the motion information is prepared independently and transmitted immediately when needed for image stabilization control.
Solution Approach 2:
The camera main body independently generates motion information using its own motion detection means, rather than relying on the lens unit to provide this information through communication. This self-service approach allows the camera to maintain accurate motion data without the time delays inherent in inter-component communication protocols.
2Adaptability or versatility
If lens communication is used to acquire current information of lens unit, then image stabilization control can be adapted to lens state, but tuning suitable for each lens becomes difficult
Solution Approach 1:
The system allows each lens unit to have its own independent image stabilization control parameters and characteristics. By generating motion information independently at the camera main body and allowing each lens to process this information according to its own characteristics, the system achieves lens-specific optimization without complex communication and tuning protocols.
3Stability of the object's composition
If motion detection means is controlled based on lens unit information, then image stabilization can be synchronized with zooming operation, but accuracy is reduced due to time lag in lens communication
Solution Approach 1:
The camera main body independently determines zooming state and controls motion detection means in advance, without waiting for lens unit information. This preliminary control ensures that motion detection remains accurate and synchronized with zooming operations, eliminating the time lag that would otherwise occur through lens communication protocols.
Data Source
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AI summary
A lens apparatus used by attaching to an image capturing apparatus, the lens apparatus comprising: vibration detection means configured to detect vibration; reception means configured to receive first motion information and reliability information from the image capturing apparatus; acquisition means configured to acquire a correction amount based on second motion information converted from the first motion information using information of the lens apparatus, the vibration detected by the vibration detection means, and the reliability information; and image stabilization means configured to perform image stabilization control based on the correction amount.