Lens Correction Using Pupil Distance for Macro Accuracy
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Solution Overview
Problem
Existing techniques for correcting optical characteristics of a lens unit, such as those in a single-lens reflex camera, fail to accurately account for changes in shooting magnification that do not correspond to changes in shooting distance, leading to erroneous corrections, particularly in macro lenses where the relationship between shooting distance and magnification is not 1:1.
Innovation Solution
An information processing apparatus that acquires images and corresponding pupil distance information to correct optical characteristics based on the lens position, using either shooting distance or shooting magnification information depending on the lens unit's identification, allowing for accurate correction even when the magnification change does not match the distance change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If correction is performed based on shooting distance information, then correction can be applied for standard lenses, but erroneous correction occurs for macro lenses where magnification change does not correspond to distance change
Solution Approach 1:
The patent changes the correction parameter from shooting distance to pupil distance (or shooting magnification) based on the lens type. For macro lenses where distance-based correction fails, the system switches to using pupil distance information that directly correlates with magnification changes, thereby maintaining correction accuracy across different lens types.
Solution Approach 2:
The patent implements a dynamic correction system that automatically selects the appropriate correction parameter (shooting distance or pupil distance) based on lens identification. The system adapts its correction method in real-time according to the specific lens being used, ensuring accurate correction for both standard and macro lenses.
2Ease of operation
If a single correction method based on shooting distance is used, then the system is simple to operate, but it cannot accurately correct optical characteristics for lenses with non-1:1 magnification relationships
Solution Approach 1:
The patent enables the system to automatically identify the lens type and select the appropriate correction parameter without user intervention. The camera performs self-diagnosis of the lens characteristics and autonomously switches between distance-based and magnification-based correction methods, maintaining operational simplicity while improving precision.
Solution Approach 2:
The system dynamically changes the correction parameter based on detected lens characteristics. When a macro lens is detected, the system switches from using shooting distance to using pupil distance or shooting magnification as the correction basis, thereby maintaining both ease of operation and correction precision.
3Reliability
If correction tables are created for multiple lens types, then accurate correction can be achieved for different lenses, but the device complexity increases
Solution Approach 1:
The patent creates a universal correction system that can handle multiple lens types through a single unified approach. By using pupil distance as a common correction parameter that works for both standard and macro lenses, the system eliminates the need for completely separate correction tables for different lens types, thereby reducing overall system complexity while maintaining accuracy.
Solution Approach 2:
The patent introduces pupil distance as an intermediary parameter that mediates between the lens type and the correction process. This intermediary allows the system to use a single correction framework that adapts to different lens types through the pupil distance measurement, avoiding the complexity of maintaining separate correction systems for each lens category.
Data Source
AI summary
An information processing apparatus includes a first acquisition unit configured to acquire a first image generated based on light passing through a lens unit, a second acquisition unit configured to acquire information corresponding to a pupil distance of the lens unit when the first image is acquired, and a correction unit configured to generate a second image, which is generated by correcting optical characteristics of the lens unit based on a position of the lens unit at the time of acquisition of the first image, wherein the correction unit corrects the first image affected by the optical characteristics based on the lens position of the lens unit based on the information corresponding to the pupil distance acquired by the second acquisition unit.