CIE Lab Color Conversion for LCDs via Plane Segmentation
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Solution Overview
Problem
Current color conversion techniques for liquid crystal display devices, such as model methods and neural network algorithms, result in significant discrepancies between displayed colors and true object colors, requiring a more efficient method to achieve accurate and vivid color representation.
Innovation Solution
A CIE Lab color space-based method that divides the color space into two-dimensional planes by lightness, determines most saturated points, and uses conversion matrices to transform colors, ensuring a one-to-one correspondence and precise color conversion, thereby enhancing color accuracy and vividness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If model method or neural network algorithm is used for color conversion, then color conversion can be achieved, but the computation process is complicated and time-consuming, and the conversion result is not satisfactory
Solution Approach 1:
The patent divides the CIE Lab color space into multiple two-dimensional color planes based on lightness levels. Each color plane is processed independently with its own conversion matrix, simplifying the overall computation. This segmentation approach reduces the complexity of handling the entire color space at once while maintaining conversion accuracy.
Solution Approach 2:
The patent transforms the color conversion process by changing the parameter representation from direct three-dimensional color space conversion to two-dimensional color plane conversion based on lightness. This parameter transformation simplifies the computation while improving color accuracy by addressing the specific characteristics of LCD display devices.
2Measurement precision
If model method or neural network algorithm is used for color conversion, then color conversion can be achieved, but a large amount of experiments are required and each experiment takes a long time
Solution Approach 1:
The patent pre-divides the color space into multiple two-dimensional color planes and pre-determines the conversion matrices for each plane. This preliminary preparation eliminates the need for time-consuming experiments during actual color conversion, as the conversion can be directly performed using the pre-computed matrices without requiring iterative experimentation.
3Measurement precision
If conventional color conversion methods are used, then color conversion can be performed, but the discrepancy between LCD color performance and true object color is large
Solution Approach 1:
The patent applies different conversion matrices to different two-dimensional color planes, each tailored to its specific lightness level and color characteristics. This local quality approach allows optimized color conversion for each region of the color space, improving overall color accuracy and reliability by addressing the specific display characteristics of LCD devices in different color ranges.
Data Source
AI summary
The present invention provides a CIE Lab color space based color conversion method, which includes converting two-dimensional color planes Ln and Ln-1 of original diagram data into two-dimensional color planes Ln′ and Ln-1′; according to a plane Lx of any lightness level between the known Ln and Ln-1, calculating Lx′ between Ln′ and Ln-1′ and having the same lightness level as Lx; calculating a conversion matrix between Lx and Lx′; calculating color-converted and adjusted target color according to the color of any one point of the original diagram data; and completing color space of the target color. The present invention also provides a CIE Lab color space based color conversion device and a liquid crystal display device. With the above method, the present invention allows of easy construction of reverse conversion model. The algorithm can be easily implemented and the operation speed is increased.