Vehicle Image Display Using Peripheral Pixel Glare Detection
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Solution Overview
Problem
Existing vehicle image display systems fail to prevent glare from strong light entering the imaging device while maintaining appropriate brightness levels, leading to blurred images and unnecessary reduction in image brightness.
Innovation Solution
A vehicle image display system that includes an imaging device, a display device, a dark condition determination unit, a luminance determination unit, a pixel value determination unit, and an image adjustment unit, which perform brightness adjustment processes based on luminance and pixel value thresholds to prevent glare and maintain image clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the predetermined value for luminance threshold is set to a large value, then the brightness of image data is not reduced when strong light enters the imaging device, but the image becomes blurred and viewers feel glare
Solution Approach 1:
The patent applies local quality by differentiating between high-luminance pixels and their peripheral pixels, applying brightness reduction only to peripheral pixels that meet specific criteria. This localized approach prevents glare from strong light sources while preserving the clarity of the light source itself and avoiding unnecessary brightness reduction in other areas.
Solution Approach 2:
The patent uses parameter changes by setting specific threshold values for luminance and pixel intensity, and by adjusting brightness based on multiple conditions (dark condition determination, high luminance pixel detection, peripheral pixel analysis). This multi-parameter approach enables dynamic brightness adjustment that resolves the contradiction between preventing glare and maintaining image clarity.
2Object-affected harmful factors
If the predetermined value for luminance threshold is set to a small value, then glare is suppressed, but the brightness of image data representing white subjects such as white lines on road is reduced more than necessary
Solution Approach 1:
The patent applies local quality by targeting brightness reduction only to peripheral pixels surrounding high-luminance pixels, rather than uniformly reducing brightness across the entire image. This selective local adjustment suppresses glare in specific areas while preserving the brightness of white subjects in other areas.
Solution Approach 2:
The patent applies partial action by performing brightness reduction only on peripheral pixels that meet specific conditions, rather than applying it to all pixels or all high-luminance regions. This partial approach prevents over-reduction of brightness in areas that do not contribute to glare.
3Device complexity
If brightness adjustment is performed based on simple luminance threshold, then processing is simple, but it cannot distinguish between strong light entering the imaging device and normal bright subjects
Solution Approach 1:
The patent applies segmentation by dividing the image into high-luminance pixels and their surrounding peripheral pixels, then applying different processing rules to each segment. This segmentation enables the system to distinguish between actual light sources and their effects on surrounding areas, improving detection accuracy without excessive complexity.
Solution Approach 2:
The patent uses peripheral pixels as an intermediary to detect the presence of strong light entering the imaging device. By analyzing the characteristics of peripheral pixels surrounding high-luminance pixels, the system can indirectly determine whether glare conditions exist, improving detection accuracy while maintaining reasonable processing complexity.
Data Source
AI summary
A vehicle image display system includes: a display device for displaying a digital image which is an image based on image data, a dark condition determination unit for determining whether a dark condition is satisfied with respect to the brightness of a surrounding environment of the vehicle, a luminance determination unit for determining whether the image data includes a high luminance pixel, a pixel value determination unit for determining whether a pixel having a pixel value equal to or lower than a second threshold value is not included in a peripheral pixel, and an image adjustment unit for performing a first brightness adjustment process for reducing the brightness of the image data when the dark condition is satisfied and the image data includes a high luminance pixel and the peripheral pixel does not include a pixel having a pixel value equal to or lower than the second threshold value.