Face-Aware Display Brightness Correction for Natural Skin Tones
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Solution Overview
Problem
Existing display technologies face issues with color distortion, particularly in images of human skin, due to excessive image enhancement, leading to unclear image quality.
Innovation Solution
A display device and method that uses artificial intelligence for face detection and adjusts image brightness and color using a look-up table and gain values based on detected face regions to prevent color distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If image enhancement is applied to improve visibility and clarity, then image brightness and clarity are improved, but color distortion occurs in skin tones and similar colors
Solution Approach 1:
The patent applies different processing strategies to different regions of the image based on content analysis. Face detection identifies skin tone regions, and the system applies color correction with reduced gain to these specific areas while maintaining enhancement in other regions. This local differentiation resolves the contradiction by preserving clarity improvement while preventing color distortion in sensitive areas.
Solution Approach 2:
The patent dynamically adjusts enhancement parameters based on detected content. When faces are detected, the system modifies color gain parameters specifically for skin tone regions, reducing the enhancement intensity to prevent color distortion. This parameter adaptation allows the system to maintain image clarity while avoiding harmful color shifts in specific regions.
2Illumination intensity
If excessive enhancement is applied to improve image visibility, then brightness and visibility are improved, but natural color is lost
Solution Approach 1:
The system applies selective enhancement by identifying face regions through detection and applying different processing parameters to these areas compared to the rest of the image. Skin tone regions receive controlled color correction that preserves natural appearance, while other areas can receive more aggressive enhancement for improved visibility.
Solution Approach 2:
The patent employs detection mechanisms that analyze image content and provide feedback to the enhancement process. When faces are detected, the system adjusts enhancement parameters in real-time to prevent color distortion. This feedback loop ensures that brightness improvement does not compromise natural color appearance in critical regions.
Data Source
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AI summary
A display device includes a display unit configured to output an image, a brightness converting unit configured to acquire a brightness corrected image by correcting brightness of the image (S520), and a controller configured to detect a face included in the image (S530), to acquire a color corrected image by applying a gain value to a color of the brightness corrected image according to whether the face is detected (S540), and to output the color corrected image or the brightness corrected image through the display unit (S550, S541).