Imaging Device Posture Change Limiting for Deflection and Distortion Correction
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Solution Overview
Problem
Imaging devices face challenges in correcting image deflection and distortion caused by posture changes, leading to trapezoidal distortion and reduced image quality, as existing methods either deform the optical system or generate areas without images, necessitating a narrowing of the view angle.
Innovation Solution
An imaging device with a posture change detection system, deflection correction, and distortion correction parts, where the control part limits posture changes to predetermined amounts to prevent image area loss, allowing for effective deflection and distortion correction without narrowing the view angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If distortion correction is performed on captured images with large posture changes, then image distortion is corrected, but areas without images are generated and view angle is narrowed
Solution Approach 1:
The patent applies preliminary action by detecting posture changes before they become excessive and preemptively adjusting the distortion correction amount. The control part limits the posture change amount input to the distortion correction part based on detected posture changes, preventing the generation of areas without images before they occur. This allows full distortion correction to be applied without view angle narrowing.
2Manufacturing precision
If deflection correction is performed by moving image extraction area or imaging element, then image deflection is corrected, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical deflection correction mechanisms with electronic image processing. Instead of using shift lenses or moving imaging elements mechanically, the system detects posture changes and electronically adjusts the image extraction area coordinates or applies digital image shift to the captured image data. This substitution significantly reduces device complexity while maintaining deflection correction accuracy.
3Area of stationary object
If posture change limitation is applied to distortion correction, then image areas are preserved, but correction effectiveness for large posture changes is reduced
Solution Approach 1:
The patent applies dynamics by making the distortion correction amount adaptive rather than fixed. The control part dynamically adjusts the posture change amount input to the distortion correction part based on the detected actual posture changes. When posture changes are within acceptable limits, full correction is applied; when they exceed limits, the correction amount is proportionally reduced. This dynamic adjustment preserves image areas while maintaining optimal distortion correction effectiveness for each shooting condition.
Data Source
AI summary
There is provided an imaging device including a posture change detection part which detects a posture change of an imaging device body, a deflection correction part which corrects deflection of a captured image generated by the posture change, a distortion correction part which corrects distortion of the captured image generated by the posture change, and a control part which makes the deflection be corrected in the deflection correction part based on the posture change detected in the posture change detection part, and makes the distortion be corrected in the distortion correction part based on posture change after limiting processing to the detected posture change.