Tilt-Induced Optical Axis Correction in Image Processing
Solution Overview
Problem
Current image processing systems fail to adequately correct optical aberrations caused by tilt operations in lens apparatuses, as they do not account for changes in the optical axis position during tilt operations, leading to suboptimal image quality.
Innovation Solution
An image processing apparatus with a correction circuit that adjusts image data based on optical characteristics, using correction data corresponding to image height and tilt operations, effectively shifting the correction center position to compensate for tilt-induced changes in the optical axis position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If correction data is prepared for each shift amount and tilt amount, then correction precision is improved, but device complexity increases
Solution Approach 1:
The patent merges the correction approaches for shift operations and tilt operations by using a unified correction data structure. The correction data includes values corresponding to image height from a correction center position, which can be applied to both shift and tilt cases. This combining approach avoids the need for completely separate correction data sets for tilt operations, thereby reducing device complexity while maintaining correction precision.
Solution Approach 2:
The correction data structure is designed to be universal, serving both shift operations and tilt operations. By defining correction data in terms of image height from a correction center position, the same correction mechanism can handle different operation types. This multi-functionality reduces the overall system complexity while preserving the precision needed for correcting optical aberrations in various operational states.
2Measurement precision
If the correction center position is changed according to tilt operation, then correction precision is improved, but calculation complexity increases
Solution Approach 1:
The patent performs preliminary calculation of the correction center position based on the tilt angle. The correction center position is calculated in advance using the relationship between tilt angle and optical axis displacement, and this pre-calculated position is then used for correction data lookup. This preliminary action simplifies the overall calculation process by breaking it into manageable steps and avoiding complex real-time calculations during image processing.
Solution Approach 2:
The patent introduces an intermediary parameter - the correction center position - that mediates between the tilt operation and the correction data application. Instead of directly applying complex tilt-based corrections, the system first determines the correction center position as an intermediary step, then uses this position to select or generate appropriate correction data. This intermediary approach simplifies the calculation while maintaining precision.
Data Source
AI summary
There is provided an image processing apparatus capable of making an optical characteristic correction corresponding to a shift in the position of an optical axis by a tilt operation. The image processing apparatus performs the optical characteristic correction, in accordance with correction data including a value corresponding to an image height with reference to a correction center position. The image processing apparatus changes the correction center position in image data according to a tilt operation of the tilt mechanism.