Color Adjusting System Saturation Weighting for Skin Tone Preservation
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Solution Overview
Problem
Wide gamut display devices face challenges in achieving high color saturation while maintaining natural skin tones and image quality, as existing methods can lead to over-saturation and chromatic distortion in skin colors.
Innovation Solution
A method and system that divide the hue circle into regions, applying different weighting formulas to input saturation degrees based on their positions, allowing for nuanced adjustment of saturation levels to enhance color saturation in high-saturation pixels while maintaining natural skin tones, using a color coordinate system converter and saturation adjuster to convert RGB signals into HSI and back.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If saturation degree is increased to provide high color saturation in wide gamut display devices, then color saturation is improved, but chromatic distortion occurs in skin colors causing unfavorable color reproduction
Solution Approach 1:
The hue circle is divided into multiple hue regions, and each hue region is further divided into multiple saturation regions based on saturation thresholds. This segmentation allows different weighting strategies to be applied to different regions, enabling high saturation enhancement for vibrant colors while applying conservative weighting to skin tone regions to prevent chromatic distortion.
Solution Approach 2:
Different weighting formulas are applied to different saturation regions within each hue region. Specifically, first weighting formulas are used for first saturation regions and second weighting formulas are used for second saturation regions. This local differentiation enables the system to enhance saturation selectively in regions where it is desirable while maintaining natural appearance in regions where over-saturation would be harmful.
2Illumination intensity
If conventional saturation adjustment methods are used to enhance color vividness, then color saturation is improved, but natural color reproduction is compromised due to over-saturation effects
Solution Approach 1:
The patent applies partial action by using different weighting approaches for different saturation regions. For first saturation regions, first weighting formulas are applied, and for second saturation regions, second weighting formulas are applied. This selective application of saturation enhancement ensures that only certain regions receive full enhancement while others receive moderated adjustment, achieving a balance between vividness and natural appearance.
Solution Approach 2:
The patent changes the weighting parameters based on the saturation region. By adjusting the weighting formulas differently for different saturation regions within the same hue region, the system dynamically modifies the saturation adjustment behavior to achieve both high color saturation and favorable color reproduction quality.
Data Source
AI summary
A method for adjusting saturation degree and a color adjusting system are provided. The method for adjusting saturation degree includes the following steps. A hue circle is divided into a plurality of hue regions, and each of the hue regions is divided into a plurality of saturation regions according to at least one saturation threshold. A plurality of first input saturation degrees of a first saturation region of a first hue region of the hue regions are weighted by a first weighting formula for obtaining a plurality of first output saturation degrees. A plurality of second input saturation degrees of a second saturation region of the first hue region of the hue regions are weighted by a second weighting formula for obtaining a plurality of second output saturation degrees. The first weighting formula is different from the second weighting formula.