Adaptive Image Enhancement for Luminance and Color Accuracy
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Solution Overview
Problem
LED displays used in both indoor and outdoor environments face issues with luminance adjustments, leading to offset colors and reduced display quality due to differences in external light environments, and conventional RGB to YCrCb conversion methods result in poor color display effects.
Innovation Solution
An image enhancement method that involves adjusting luminance and chroma data using specific parameters, including luminance and chroma adjustment parameters, to convert image data between different color dimensions, and performing adaptive adjustments until preset conditions are met, followed by image color dimension conversion to achieve enhanced display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If linear adjustment of RGB lamp bead current is used to adjust luminance, then luminance control is achieved, but color display accuracy deteriorates with color offset
Solution Approach 1:
The patent segments the luminance adjustment process into multiple luminance intervals (first luminance interval, second luminance interval, etc.), applying different adjustment strategies to different brightness ranges. This allows precise control of luminance while maintaining color accuracy in each specific interval, resolving the contradiction between luminance control and color display accuracy.
Solution Approach 2:
The patent applies different adjustment manners (first adjustment manner, second adjustment manner, third adjustment manner) to different luminance intervals and image regions. By tailoring the adjustment strategy to local characteristics (bright regions vs. dark regions, different luminance intervals), the system maintains color accuracy while achieving luminance control, preventing the color offset that occurs with uniform linear adjustment.
2Ease of operation
If RGB is converted to YCrCb to process luminance component, then luminance processing is simplified, but color display effect deteriorates
Solution Approach 1:
Instead of converting RGB to YCrCb for processing and then converting back (which causes color display degradation), the patent inverts the approach by performing luminance processing directly on RGB data through selective channel adjustment. This maintains color accuracy while achieving luminance control, resolving the contradiction between processing simplicity and color display effect.
Solution Approach 2:
The patent changes the processing parameters by working directly with RGB color space parameters rather than converting to YCrCb. By adjusting R, G, and B channel values according to different luminance intervals and image characteristics, the system achieves both simplified processing and maintained color display quality, avoiding the color degradation inherent in YCrCb conversion methods.
3Manufacturing precision
If adaptive luminance adjustment is performed across all intervals, then luminance enhancement is improved, but processing complexity increases
Solution Approach 1:
The patent applies partial adjustment strategies by identifying specific target intervals (first target interval, second target interval) within the luminance range and applying adjustment only where needed. Rather than uniformly adjusting all luminance values, the system selectively processes specific intervals, achieving effective luminance enhancement while reducing processing complexity compared to full-range adaptive adjustment.
Data Source
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AI summary
Disclosed is an image enhancement method including: (S202), obtaining an image adjustment parameter; (S204), converting first image data to be processed into second image data; (S206), adjusting the luminance data based on the luminance adjustment parameter to obtain adjusted luminance data, updating the luminance adjustment parameter when that the adjusted luminance data does not meet a preset luminance enhancement condition, and based on an updated luminance adjustment parameter, continuing to adjust the adjusted luminance data until final adjusted luminance data meets the luminance enhancement condition; (S208), adjusting the chroma data based on the chroma adjustment parameter to obtain adjusted chroma data, updating the chroma adjustment parameter when that the adjusted chroma data does not meet a preset chroma enhancement condition, and based on an updated chroma adjustment parameter, continuing to adjust the adjusted chroma data until final adjusted chroma data meets the chroma enhancement condition; and (S210), performing image color dimension conversion on the luminance data that meets the luminance enhancement condition and the chroma data that meets the chroma enhancement condition, to obtain third image data belonging to a same color dimension as the first image data, and thereby generating the third image data after image-enhanced from the first image data.