Image Stabilization Cropping After Distortion Correction
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Solution Overview
Problem
Existing imaging apparatuses struggle to efficiently correct image distortion due to camera shake while maintaining the angle of view.
Innovation Solution
An imaging apparatus that includes an image sensor, a sensor to detect shake, and an image processor to adjust the output area based on detected shake, performing distortion correction without reducing the angle of view by using an enlarged image area for image stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If distortion correction is performed using an extraction area rotated or moved according to shake correction amount, then image distortion due to camera shake is corrected, but the angle of view is reduced
Solution Approach 1:
The patent applies distortion correction in a different dimensional approach by using the enlarged image area generated through distortion correction itself as the basis for image stabilization, rather than applying stabilization to a pre-corrected extracted area. This dimensional shift allows the correction area to be defined within the enlarged image area rather than being constrained by the original imaging area, thereby maintaining angle of view while achieving distortion correction.
Solution Approach 2:
The patent performs distortion correction first to generate an enlarged image area, and then uses this enlarged area as the foundation for subsequent image stabilization processing. This preliminary action of distortion correction creates the necessary space and dimensional headroom that allows the correction area to be positioned within the enlarged image area rather than being constrained by the original imaging area boundaries.
2Reliability
If a correction area is provided within the range corresponding to the imaging area to crop the image, then image stabilization is achieved, but the output image quality and angle of view are compromised
Solution Approach 1:
The patent repositions the correction area from being constrained within the original imaging area to being defined within the enlarged image area generated by distortion correction. This dimensional repositioning allows the correction area to utilize the additional space created by distortion correction, enabling image stabilization without compromising the output image quality or angle of view.
Solution Approach 2:
The patent changes the parameter defining the correction area from being relative to the original imaging area to being relative to the enlarged image area. This parameter change allows the correction area to be proportionally larger relative to the output image, thereby maintaining angle of view and output image quality while still achieving effective image stabilization.
Data Source
AI summary
An imaging apparatus includes: an image sensor configured to capture the subject image to generate image data, the image sensor having an imaging area in which a subject image is formed through an optical system; a sensor configured to detect a shake amount of the imaging apparatus; and an image processor configured to perform image stabilization by adjusting an output area according to the shake amount detected by the sensor, the output area being output as an image in the image data. In the image processor, distortion correction responsive to distortion aberration of the optical system is performed on an image area indicated by the image data. The image processor performs the image stabilization without a correction area in a corrected image area by the distortion correction, the correction area being provided within a range corresponding to the imaging area to crop the image of the output area.