Lens Interchangeable Camera Sensor Shake Correction Data Verification
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Solution Overview
Problem
Lens interchangeable digital cameras face issues with image correction due to missing or inaccessible optical characteristic data, leading to noticeable shifts between the optical and image centers, causing discomfort and image deterioration during live view display and video imaging.
Innovation Solution
The camera incorporates a sensor movement type shake correction mechanism, an acquisition unit for optical characteristic data, a determination unit to assess data availability, and an operation deciding unit that restricts sensor movement operations when adaptive optical characteristic data cannot be acquired, ensuring image correction is possible only when necessary data is available.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sensor movement type shake correction mechanism is used, then shake correction capability is improved, but the shift between optical center and image center increases causing image deterioration
Solution Approach 1:
The patent replaces the mechanical sensor movement type shake correction mechanism with a lens movement type shake correction mechanism. This substitution eliminates the need to physically move the image sensor, thereby preventing the shift between optical center and image center while still achieving effective shake correction through lens element movement.
Solution Approach 2:
The patent changes the operational parameters of the shake correction mechanism by switching from sensor movement to lens movement. This parameter change allows the system to maintain shake correction functionality while eliminating the adverse effect of optical-center-to-image-center misalignment that occurs with sensor movement.
2Manufacturing precision
If image correction is performed based on optical characteristic data, then image quality is improved, but the system complexity increases due to data acquisition and verification requirements
Solution Approach 1:
The patent implements a self-service mechanism where the image correction unit automatically verifies whether the acquired optical characteristic data is appropriate for correction. The system autonomously determines data suitability and performs correction only when conditions are met, eliminating the need for complex external verification systems while maintaining image quality.
Solution Approach 2:
The patent introduces a feedback mechanism where the image correction unit continuously monitors the availability and appropriateness of optical characteristic data. Based on this feedback, the system dynamically adjusts whether to perform image correction, creating a closed-loop control system that simplifies the overall architecture while ensuring high image quality when correction is applied.
3Manufacturing precision
If optical characteristic data is acquired from lens unit storage, then image correction capability is improved, but reliability decreases when data is missing or inaccessible
Solution Approach 1:
The patent implements a beforehand cushioning mechanism by pre-verifying the availability and appropriateness of optical characteristic data before attempting image correction. The system checks whether the data exists and is suitable for correction in advance, and only proceeds with correction when verification succeeds, thereby preventing failures due to missing or inaccessible data.
Solution Approach 2:
The patent performs preliminary verification of optical characteristic data availability and appropriateness before executing image correction. This preliminary action ensures that the system only attempts correction when the necessary conditions are met, thereby maintaining high reliability while preserving image correction capability when data is available.
Data Source
AI summary
The lens interchangeable digital camera includes a sensor movement type shake correction mechanism that performs a sensor movement operation of moving an image sensor in a direction to cancel a shake. A characteristic data acquisition unit acquires optical characteristic data corresponding to optical characteristics of an imaging optical system of a lens unit mounted on a body mount. A determination unit determines whether or not adaptive optical characteristic data that can be handled by an image correction unit that performs image correction based on the optical characteristic data can be acquired. An operation deciding unit prohibits a shift operation which is at least a part of a sensor movement operation in an uncorrectable state where the image correction based on the adaptive optical characteristic data is not possible since the adaptive optical characteristic data cannot be acquired.