Dynamic Image Recovery Filter for Optical Aberration Correction
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Solution Overview
Problem
Existing image recovery techniques fail to properly correct image blurring and aberration due to variations in optical characteristics of the imaging optical system that cannot be determined by optical design parameters, leading to potential deterioration of image quality.
Innovation Solution
An image capturing apparatus that includes a parameter setting unit for determining factors influencing optical characteristics, an optical characteristics obtaining unit, a recovery filter determining unit, and an image recovery unit, which uses spectral parameters to create a recovery filter for correcting image quality issues based on actual optical characteristics during image capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If image recovery processing is performed using design optical characteristics, then image quality can be improved under ideal conditions, but image quality deteriorates when actual optical characteristics differ from design characteristics due to factors like spectrum bias and defocusing
Solution Approach 1:
The patent implements dynamic adjustment of optical characteristics by introducing a focus adjustment unit that modifies the PSF based on actual focus status. The system transitions from static design characteristics to dynamic characteristics that adapt to real-time focusing conditions, thereby maintaining recovery accuracy under varying focus states
Solution Approach 2:
The patent changes optical parameters by incorporating spectrum bias correction that adjusts PSF characteristics based on the spectral distribution of the captured image. This allows the system to adapt optical characteristics to match actual imaging conditions rather than relying on fixed design parameters
2Device complexity
If optical characteristics are determined solely by optical design parameters, then the system remains simple, but the system cannot account for variations caused by spectrum bias and defocusing
Solution Approach 1:
The patent implements self-service by having the system automatically determine actual optical characteristics from the captured image data itself. The focus adjustment unit and spectrum bias correction unit process the image to extract real optical characteristics without requiring external measurement equipment or manual calibration
Solution Approach 2:
The patent introduces feedback mechanisms where the system continuously monitors actual imaging conditions (focus status, spectrum distribution) and adjusts optical characteristics accordingly. This closed-loop approach ensures that optical characteristics are constantly updated to match actual conditions
Data Source
AI summary
An image capturing apparatus includes an image obtaining unit adapted to obtain a captured image of an object captured by an imaging optical system, a parameter value setting unit adapted to set a value of a parameter indicating a factor determining optical characteristics of the imaging optical system, an optical characteristics obtaining unit adapted to obtain optical characteristics of the imaging optical system during capture of the captured image, a recovery filter determining unit adapted to determine a recovery filter to be used for correcting deterioration of the image quality of the captured image due to optical characteristics of the imaging optical system, based on the obtained optical characteristics and the value of the parameter, and an image recovery unit adapted to perform recovery processing by applying the recovery filter to the captured image. The factor determining optical characteristics does not depend on only an optical design parameter of the imaging optical system.