Imaging Apparatus Magnification Chromatic Aberration Correction
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Solution Overview
Problem
Monochrome image sensors cannot perform magnification chromatic aberration correction on luminance images, leading to blurring in edge portions and reduced image quality due to their inability to capture color images.
Innovation Solution
An imaging apparatus that includes a magnification chromatic aberration correction unit for color images and an image selection unit to choose between a first luminance image and a second luminance image based on the lens's magnification chromatic aberration, with the second luminance image obtained from corrected color images, allowing for selection and output of a high-quality luminance image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a monochrome image sensor is used to capture high-resolution luminance images, then the luminance image resolution is improved, but blurring in edge portions occurs due to magnification chromatic aberration
Solution Approach 1:
A color image sensor is introduced as an intermediary device to capture color images that contain chromatic aberration information. This color image serves as a mediator to detect the magnification chromatic aberration characteristics of the lens, which are then used to correct the luminance image from the monochrome sensor, resolving the edge blurring problem while maintaining high resolution
Solution Approach 2:
The system uses the color image sensor to continuously monitor and detect magnification chromatic aberration in real-time. This feedback information about chromatic aberration is then applied to correct the luminance image, creating a closed-loop system that maintains image quality despite lens imperfections
2Manufacturing precision
If magnification chromatic aberration correction is performed on color images, then color image quality is improved, but the correction cannot be applied to luminance images from monochrome sensors
Solution Approach 1:
The color image sensor serves multiple functions: it captures color images for their own sake and simultaneously provides chromatic aberration reference data for correcting luminance images. This multi-functionality allows the system to benefit from chromatic aberration correction in both color and luminance imaging modes
Solution Approach 2:
The system creates a chromatic aberration reference model by capturing color images and analyzing the displacement between color channels. This reference model is then copied and applied to correct luminance images, transferring the correction capability from color to luminance imaging
Data Source
AI summary
The present technology relates to an imaging apparatus, an imaging method, and a program that are capable of obtaining a higher-quality luminance image. The imaging apparatus captures a luminance image with a monochrome image sensor and also captures a color image with a color image sensor. A magnification aberration amount determination unit analyzes the amount of magnification chromatic aberration of each image height position on the basis of information on magnification chromatic aberration of a lens unit. A recording image selection unit selects the luminance image captured with the monochrome image sensor or a luminance image obtained from the color image captured with the color image sensor on the basis of the result of the analysis on the amount of magnification chromatic aberration, and sets the selected luminance image as a recording image. When a luminance image is selected in accordance with the amount of magnification chromatic aberration in such a manner, a high-quality recording image with less blurring resulting from the magnification chromatic aberration can be obtained. The present technology can be applied to a digital still camera.