Image Stabilization Lens Shake Correction via Local Quality
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Solution Overview
Problem
Existing image stabilization methods for imaging devices fail to uniformly correct image shake across the entire imaging face, leading to noticeable differences in shake within the angle of view, especially with short focal lengths and wide-angle lenses, resulting in unsightly 'konnyaku phenomenon' during video recording.
Innovation Solution
An image stabilization device with a shake angle sensor, correction amount calculation unit, and actuator that determines and applies movement amounts to the image stabilization lens or imaging face to suppress image shake at each point on the imaging surface, ensuring minimal shake difference across the view angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the imaging sensor is moved to correct the image shake caused in the central part of the imaging face, then the image shake in the central part is corrected, but the image shake remains in the peripheral area
Solution Approach 1:
The patent applies local quality by calculating and applying different movement amounts to different regions of the imaging face. The correction amount calculation unit determines region-specific movement amounts based on the shake angle and position on the imaging face, allowing each region to be corrected according to its local shake characteristics rather than applying a uniform correction across the entire face.
2Manufacturing precision
If the movement amount of the imaging sensor is set to correct image shake at a focusing area, then the image shake at the focusing area is suppressed, but large image shake remains in other parts
Solution Approach 1:
The patent segments the imaging face into multiple regions and applies different correction strategies to each region. The correction amount calculation unit divides the imaging face into a first region (where objects are to be imaged) and a second region (peripheral area), and calculates appropriate movement amounts for each region based on their respective shake characteristics and importance.
3Manufacturing precision
If conventional image stabilization is used with short focal length lenses, then the shake correction function performance is improved, but the difference in image shake within the angle of view becomes noticeable
Solution Approach 1:
The patent changes the correction parameters by calculating position-dependent movement amounts across the imaging face. Instead of using a single correction parameter for the entire face, the system adjusts the movement amount parameter based on the position on the imaging face and the shake angle, thereby achieving more uniform shake suppression across the entire angle of view.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively minimizes image shake across the entire imaging surface, reducing the perception of image instability and preventing the 'konnyaku phenomenon' by calculating and applying precise movement amounts to stabilize images uniformly.
Implementation Method 1
a shake angle sensor configured to detect a shake angle of the imaging device
Implementation Method 2
an actuator configured to move the image stabilization lens or the imaging face by the movement amount set by the correction amount calculation unit in a plane orthogonal to an optical axis of the imaging device
Data Source
AI summary
The present invention relates to an image stabilization device for correcting an image shake formed on an image face of an imaging device, and the image stabilization device includes a shake angle sensor configured to detect a shake angle of the imaging device, a correction amount calculation unit configured to set a movement amount of an image stabilization lens composing a part of an imaging optical system provided in the imaging device or a movement amount of the imaging face based on the shake angle detected by the shake angle sensor so that the image shake formed on the imaging face is suppressed, and an actuator configured to move the image stabilization lens or the imaging face by the movement amount set by the correction amount calculation unit in a plane orthogonal to an optical axis of the imaging device.