Rotary Shake Correction Reference Area Rotation Imaging
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Solution Overview
Problem
Existing imaging technologies face challenges in effectively correcting rotary shake and distortion aberration, leading to information loss on the captured angle of view, as they often require clipping and electronic zoom, which can result in a narrower angle of view and loss of corner information.
Innovation Solution
An imaging apparatus that includes a detection unit for rotary shake, a rotary correction unit to rotate the reference area with the optical axis as the rotation axis, and a distortion aberration correction unit to correct distortion aberration within the rotated reference area, ensuring the reference area fits within the captured image, thereby allowing effective correction of rotary shake and distortion aberration without applying electronic zoom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If rotary shake correction is performed by rotating the captured image in the opposite direction to the detected rotation, then the rotary shake is corrected, but information on the captured angle of view is lost due to clipping and electronic zoom requirements
Solution Approach 1:
The patent applies preliminary action by rotating the reference area (area to be referenced for distortion aberration correction) in advance in the opposite direction to the detected rotary shake, before performing distortion aberration correction. This preliminary rotation ensures that when distortion aberration correction is applied, the rotated reference area fits within the captured image area, allowing the entire captured angle of view to be utilized without clipping or electronic zoom.
2Manufacturing precision
If distortion aberration correction is performed by clipping a barrel-shaped area from the captured image, then barrel distortion is corrected, but information on the four corners is eliminated
Solution Approach 1:
The patent applies preliminary action by rotating the reference area in the opposite direction to the detected rotary shake before performing distortion aberration correction. This ensures that the reference area, which is subsequently used for distortion correction, is already positioned to fit within the captured image. As a result, the distortion aberration correction can be performed using the entire captured image area including corners, eliminating the need to clip corner information.
3Manufacturing precision
If both rotary shake correction and distortion aberration correction are performed sequentially with clipping, then both corrections are achieved, but the angle of view becomes narrower than the captured angle of view
Solution Approach 1:
The patent applies preliminary action by rotating the reference area in the opposite direction to the detected rotary shake before performing distortion aberration correction. This preliminary rotation ensures that the reference area fits within the captured image area, allowing both corrections to be performed while maintaining the full captured angle of view without narrowing it.
Solution Approach 2:
The patent applies the inversion principle by rotating the reference area in the opposite direction to the detected rotary shake. This inverse rotation compensates for the rotary shake effect, and when combined with distortion aberration correction, allows the entire captured image area to be utilized without clipping, thereby preserving the full angle of view.
Data Source
AI summary
When correcting rotary shake, an area to be referenced when distortion aberration correction is performed is rotated by a detected rotation amount in a direction correcting the rotary shake, such that the reference area fits into the area of an image that has been captured. A rectangular image of the same size as the captured image is obtained by applying distortion aberration correction to an image included in the reference area. If the reference area will not fit into the area of the captured image when rotated by the detected rotation amount, the reference area is rotated by a maximum angle at which the reference area will fit into the area of the captured image, and distortion aberration correction is applied to the image included in the reference area. Information on the captured angle of view can thereby be effectively used when performing distortion aberration correction and rotary shake correction.