Imaging Apparatus Dynamic Acquisition Range for Lens Distortion
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Solution Overview
Problem
Imaging apparatuses with live-view display functions face challenges in accurately displaying enlarged images due to lens distortion, as existing distortion correction methods do not effectively adapt to changes in distortion information during live-view operations.
Innovation Solution
An imaging apparatus and method that includes an imaging section, a distortion information obtaining section, and a distortion correction section, which updates the acquisition range of image data based on changing distortion information, allowing for real-time correction and enlarged live-view display without user-perceptible distortions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If distortion correction is performed using fixed acquisition range, then processing complexity is reduced, but image accuracy deteriorates when lens distortion changes during live-view operation
Solution Approach 1:
The patent applies dynamics by making the acquisition range adjustable and updateable based on current lens distortion conditions. Instead of using a fixed acquisition range, the system dynamically modifies the acquisition range according to the actual distortion characteristics of the lens during live-view operation, thereby maintaining image accuracy while adapting to changing distortion conditions.
Solution Approach 2:
The patent changes the parameters of the acquisition range (such as reading start position and reading end position) based on distortion information. By adjusting these parameters according to the actual distortion state, the system achieves accurate distortion correction without requiring overly complex processing, as it leverages existing image data with modified parameters.
2Measurement precision
If the acquisition range is updated in response to distortion changes, then image quality is maintained, but processing time increases
Solution Approach 1:
The patent obtains distortion information in advance and uses this information to determine the appropriate acquisition range before performing the actual image processing. By preparing the acquisition range parameters beforehand based on distortion characteristics, the system reduces the processing time required during live-view operation while maintaining image quality.
Solution Approach 2:
The system uses distortion information as feedback to adjust the acquisition range. The distortion information obtained from the lens characteristics feeds back into the image processing pipeline, allowing the system to automatically adjust the acquisition range parameters to compensate for distortion, thereby maintaining image quality without requiring manual intervention or excessive processing time.
3Measurement precision
If distortion information is obtained and used for correction, then image accuracy improves, but device complexity increases
Solution Approach 1:
The patent introduces distortion information as an intermediary element that mediates between the lens distortion problem and the image processing solution. Instead of directly addressing the complex distortion correction problem, the system uses distortion information (which can be obtained from lens specifications or pre-measured data) as an intermediate parameter to guide the acquisition range adjustment, thereby improving image accuracy without significantly increasing device complexity.
Data Source
AI summary
An imaging apparatus includes an imaging section, an imaging acquisition range control section, a distortion information obtaining section, and a display section. The imaging section includes a lens and obtains an image data by imaging a subject image. The imaging acquisition range control section controls an acquisition range of the image data such that a part of the subject image is read out. The distortion information obtaining section obtains distortion information of the lens. The distortion correction section corrects distortion of the image data in accordance with the distortion information. The display section performs enlarged live-view display operation to display an enlarged image of the corrected image data in the acquisition range. The imaging acquisition range control section updates the acquisition range, when the distortion information is changed while the enlarged live-view display operation is performed, in accordance with the changed distortion information.