Image Processing Device for Luminance Matching in Dual-Mode Displays
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Solution Overview
Problem
Existing display technologies for public transportation vehicles struggle to simultaneously or alternately display main information images (e.g., graphic or text images) and sub images (e.g., natural or animation images) with appropriate image quality, leading to visibility issues due to differences in luminance and quality between the two.
Innovation Solution
An image processing device and method that adjusts the image quality of sub images based on the feature amounts of main images, using resizing and tone curve adjustments to match the image quality of main images, ensuring appropriate display modes for simultaneous or alternating displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sub images are displayed simultaneously or alternately with main images using existing display technologies, then both images can be displayed on the screen, but visibility issues occur due to differences in luminance and image quality between the two types of images
Solution Approach 1:
The patent applies parameter changes by adjusting the luminance of sub images to match the luminance of main images. The luminance adjustment unit modifies the luminance parameter of sub images based on the luminance of main images, ensuring consistent visibility when both types of images are displayed simultaneously or alternately. This resolves the contradiction by changing the luminance parameter of sub images adaptively.
Solution Approach 2:
The patent implements feedback by using the luminance information of main images to control the luminance adjustment of sub images. The system continuously monitors the luminance of main images and adjusts sub image luminance accordingly, creating a feedback loop that maintains image quality consistency across different display modes.
2Manufacturing precision
If image quality adjustment is performed on sub images based on main image feature amounts, then visibility is improved, but processing complexity increases
Solution Approach 1:
The patent applies local quality by performing image quality adjustment only on sub images while leaving main images unchanged. The luminance adjustment unit specifically targets sub images for luminance modification based on main image characteristics, rather than processing all images uniformly. This localized approach improves image quality consistency without unnecessarily increasing overall processing complexity.
Data Source
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AI summary
There is provided an image processing device for generating display image data for displaying a main image and a sub image simultaneously or in a switching manner. The image processing device comprises: a main image data input means (11) for receiving input of main image data representing the main image; a sub image data input means (12) for receiving input of sub image data representing the sub image; a display mode acquisition means (13) for acquiring display mode information indicating a display mode for displaying the main image or the sub image, or both the main image and the sub image simultaneously or in a switching manner; a first feature amount calculation means (25) configured to receive the sub image data input to the sub image data input means (12) or resized sub image data obtained by resizing the sub image data in accordance with the display mode information acquired by the display mode acquisition means (13), and use part or all of the image represented by the received image data to calculate a feature amount regarding image quality of the received image data; an image quality adjustment means (26) for performing image quality adjustment on the resized sub image data to generate adjusted sub image data; a display image data generation means (16) for generating the display image data from the main image data input to the main image data input means (11) and the adjusted sub image data generated by the image quality adjustment means (26), in accordance with the display mode information acquired by the display mode acquisition means (13); and a second feature amount calculation means (51) for calculating a feature amount regarding image quality of the display image data generated by the display image data generation means (16). In a case where the display mode indicated by the display mode information shifts from a simultaneous display mode in which the main image and the sub image are displayed simultaneously or a main image display mode in which only the main image is displayed to a sub image display mode in which only the sub image is displayed, when the image quality adjustment means (26) performs the image quality adjustment on the sub image data corresponding to the sub image display mode after the shift, the image quality adjustment means (26) is configured to perform, based on a reference feature amount obtained from a feature amount of the display image data corresponding to the display mode before the shift calculated by the second feature amount calculation means (51), the image quality adjustment so that a difference between a feature amount of the adjusted sub image data and the reference feature amount is smaller than a difference between the calculated feature amount of the sub image data and the reference feature amount. The reference feature amount is a feature amount that gradually varies from the feature amount of the display image data to a preset value.