Camera Shake Correction via Dynamic Zoom Lens Adjustment
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Solution Overview
Problem
Existing camera devices face challenges in maintaining image quality when mounted in shaky environments, as the movement range of the imaging element exceeds the effective imaging range of the optical lens, leading to vignetting and degradation in captured image quality.
Innovation Solution
A camera device with a shake correction mechanism that includes a zoom lens, an imaging element, a shake sensor, and a processor, which detects shake, adjusts zoom magnification, and cuts affected areas of the image to prevent vignetting and maintain image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the movement range of the imaging element unit is increased to suppress shake in shaky environments, then image stabilization effect is improved, but vignetting occurs when the movement range exceeds the effective imaging range of the optical lens, degrading image quality
Solution Approach 1:
The patent dynamically adjusts the effective imaging range by changing the focal length of the zoom lens based on detected shake magnitude. When large shake is detected, the focal length is increased to expand the effective imaging range, allowing the imaging element to move within a larger range without causing vignetting. This dynamic adaptation resolves the contradiction by making the system flexible rather than fixed.
Solution Approach 2:
The patent changes the optical parameter (focal length) of the zoom lens in response to shake conditions. By adjusting the focal length parameter, the effective imaging range is modified to match the required movement range for shake correction, thereby preventing vignetting while maintaining image quality and stabilization effectiveness.
2Manufacturing precision
If a zoom lens with a large effective imaging range is selected to prevent vignetting, then image quality is maintained, but the device complexity and cost increase
Solution Approach 1:
Rather than selecting a single lens with a fixed large effective imaging range, the patent employs a zoom lens that can dynamically adjust its focal length. This allows the system to use a smaller, more compact lens design that can adapt its effective imaging range through focal length changes, reducing overall device complexity while maintaining image quality.
Solution Approach 2:
The patent changes the focal length parameter of the zoom lens based on shake detection, allowing a single lens to provide multiple effective imaging ranges. This eliminates the need for multiple lenses or a specifically designed large-range lens, thereby reducing device complexity and cost while maintaining image quality when needed.
3Manufacturing precision
If the movement range of the imaging element is minimized to suppress vignetting, then image quality is maintained, but the image stabilization effect is reduced
Solution Approach 1:
The patent dynamically adjusts the focal length of the zoom lens according to the magnitude of detected shake. When large shake is detected, the focal length is increased to expand the effective imaging range, allowing larger movement of the imaging element without vignetting. When small shake is detected, the focal length returns to normal, maintaining image quality. This dynamic adjustment resolves the contradiction by adapting the system to actual conditions.
Solution Approach 2:
The patent uses shake detection feedback to control the focal length adjustment of the zoom lens. The shake detection unit provides real-time information about shake magnitude, which triggers appropriate focal length changes. This feedback mechanism ensures that the effective imaging range is optimized based on actual shake conditions, maintaining both image stabilization effectiveness and image quality.
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
Effectively suppresses image quality degradation and prevents reliability issues in captured data by correcting shake-induced distortions and adjusting zoom settings to ensure optimal image capture.
Implementation Method 1
a shake sensor that detects shake of the camera device
Implementation Method 2
a shake correction mechanism that holds a holder which holds the imaging element, and performs shake correction on a captured image captured by the imaging element through driving of the holder based on a detection value of the shake sensor
Implementation Method 3
a lens unit that includes a zoom lens on which subject light is incident, and is capable of changing a zoom magnification of the zoom lens
Data Source
AI summary
A camera device includes a lens unit that includes a zoom lens on which subject light is incident, and can change a zoom magnification of the zoom lens, an imaging element that images an image based on the subject light, a shake sensor that detects shake of the camera device, a shake correction mechanism that holds a holder holding the imaging element, and performs shake correction on a captured image captured by the imaging element through driving of the holder based on a detection value of the shake sensor, and a processor that causes the lens unit to change the zoom magnification of the zoom lens based on the detection value of the shake sensor, cuts a part of the captured image on which the shake correction is performed by the shake correction mechanism through a zoom process according to the changed zoom magnification, and outputs the cut part.