Imaging Device Motion Correction via Segmented Optical Adjustment
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Solution Overview
Problem
Existing imaging devices struggle to reliably correct the effect of motion on images, particularly during long exposure times, as they fail to adequately address blurring and deformation caused by camera shake and the focal plane phenomenon, especially in low-light conditions.
Innovation Solution
An imaging device that includes an imaging unit, a drive control unit, and a signal processing unit, which captures images through an optical system, detects motion, and uses position and motion information to correct blurring by optically adjusting the optical system or imaging unit, and performs signal processing to synchronize and correct the image based on a position conversion function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image stabilization is performed using conventional methods (OIS or EIS), then camera shake correction is achieved, but blurring within exposure time cannot be reduced during long exposure imaging
Solution Approach 1:
The patent segments the image into multiple regions (center region and edge regions) and applies different correction amounts to each region. The correction amount varies according to the distance from the image center, allowing precise correction of blurring within exposure time for each region while maintaining overall image stabilization.
Solution Approach 2:
The patent applies local quality by making the correction amount position-dependent within the image. Specifically, different correction amounts are applied to different regions (center vs. edge) based on their distance from the image center, enabling precise correction of motion effects that vary across the image plane during long exposure.
2Reliability
If parallel movement correction is applied to correct rotational motion, then camera shake is corrected, but edge deformation occurs in the image
Solution Approach 1:
The patent applies different correction amounts to different regions of the image based on their distance from the center. By making the correction amount position-dependent, it corrects camera shake while preventing edge deformation that would result from uniform parallel movement correction applied to the entire image.
Data Source
AI summary
Provided is an imaging device, a solid-state image sensor, a camera module, a drive control unit, and an imaging method by which an effect of motion on an image can be corrected. The drive control unit controls drive of at least one of an optical system or an imaging unit by finding, on the basis of motion of the imaging unit that is physically detected, an amount of movement at the time at least one of the optical system or the imaging unit is moved relative to another to optically correct blurring appearing in the image captured by the imaging unit. A signal processing unit performs signal processing for correcting an effect of the motion of the imaging unit on the image based on position information and motion information synchronized with each coordinate on the image.