Hybrid Image Stabilization Control for Angular and Shift Shake
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Solution Overview
Problem
Conventional imaging systems fail to effectively correct image blurs in both the central and peripheral portions of an image due to angular and shift shakes, particularly in short-distance imaging with high magnification, leading to residual image degradation.
Innovation Solution
A control apparatus and method that utilizes a first and second correcting member in an imaging system, each movable for image stabilization, with a processor to determine correction ratios for angular and shift shakes, and a memory to store stabilization residue amounts, enabling coordinated movement of the image sensor and lens units to minimize residual image blur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If image sensor image stabilization is used to correct image blur in the central portion of the image, then central portion blur is reduced, but peripheral portion blur remains significant due to larger image point moving amount
Solution Approach 1:
The patent segments the image stabilization function into two independent correction systems: image sensor-based stabilization for the central portion and in-lens stabilization for the peripheral portion. Each system operates with optimized correction ratios specific to its target region, allowing both central and peripheral blurs to be corrected effectively without compromising either region's quality
Solution Approach 2:
The patent merges image sensor image stabilization and in-lens image stabilization into a hybrid system that operates simultaneously. The control apparatus coordinates both systems with different correction ratios - the image sensor corrects central portion blur while the in-lens system corrects peripheral portion blur, achieving comprehensive image stabilization across the entire image area
2Reliability
If conventional hybrid image stabilization with fixed correction ratios is used, then angular shake correction is achieved, but shift shake correction in short-distance imaging is insufficient
Solution Approach 1:
The patent implements dynamic correction ratio adjustment based on imaging conditions. The control apparatus determines whether the system is performing short-distance imaging (high magnification) and switches between different correction strategies: using image sensor stabilization for angular shake in normal conditions, and activating in-lens stabilization with adjusted correction ratios for shift shake in short-distance imaging, making the system adaptable to different shooting scenarios
Data Source
AI summary
A control apparatus for use in an imaging system that includes a first correcting member movable for image stabilization and provided to one of an image pickup apparatus and a lens apparatus detachably attachable to the image pickup apparatus, and a second correcting member movable for the image stabilization and provided to the other of the image pickup apparatus and the lens apparatus acquires first correction ratios of the first correcting member and the second correcting member for angular shake of the imaging system, and second correction ratios of the first correcting member and the second correcting member for shift shake of the imaging system.