XYZ-to-Six-Primary Color Conversion Using Pseudo White Points
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Solution Overview
Problem
Existing RGB color systems struggle to display a wide range of colors beyond the ITU-R BT.2020 color gamut, limiting the representation of colors in digital displays.
Innovation Solution
A system and method that introduces a six-primary color system, including red, green, blue, cyan, magenta, and yellow primaries, capable of displaying colors outside the ITU-R BT.2020 color gamut by using a viewing device that operates in the CIE Yxy color space, with luminance-independent colorimetric coordinates, and can display at least 80% of the visible spectrum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an RGB color system is used, then the system is simple and compatible with existing standards, but the color gamut is limited to ITU-R BT.2020
Solution Approach 1:
The color system is segmented into multiple independent primary color channels (R, G, B, C, M, Y) instead of using a single RGB triplet. Each primary color can be independently controlled and optimized, allowing the system to cover a broader color gamut while maintaining manageable complexity through modular processing of each color channel
Solution Approach 2:
The system transitions from a 3-dimensional RGB color space to a 6-dimensional color space by adding three more primary color dimensions (C, M, Y). This dimensional expansion allows representation of colors outside the traditional BT.2020 gamut boundary, effectively adding a new degree of freedom for color representation
2Adaptability or versatility
If a six-primary color system is implemented, then color representation beyond BT.2020 is achieved, but conversion complexity increases
Solution Approach 1:
The patent introduces intermediate color space representations and conversion matrices that serve as mediators between the six-primary color system and standard RGB displays. These intermediaries facilitate seamless translation of six-primary color data to conventional display formats, reducing the perceived complexity for end applications
Solution Approach 2:
The system dynamically adjusts color parameters and conversion matrices based on the target display capabilities. By changing the transformation parameters according to the specific display device being used, the system optimizes color mapping efficiency and reduces conversion complexity for each specific application scenario
3Measurement precision
If luminance-independent colorimetric coordinates are used, then color accuracy is improved, but processing complexity increases
Solution Approach 1:
The luminance component (Y) is extracted and separated from the colorimetric coordinates (x, y), allowing independent processing of brightness and color information. This extraction enables more precise colorimetric measurements without the confounding factor of luminance variations, while simplifying processing by handling luminance and chromaticity as independent parameters
Data Source
AI summary
Systems and methods for a multi-primary color system for display. A multi-primary color system increases the number of primary colors available in a color system and color system equipment. Increasing the number of primary colors reduces metameric errors from viewer to viewer. One embodiment of the multi-primary color system includes Red, Green, Blue, Cyan, Yellow, and Magenta primaries. The systems of the present invention maintain compatibility with existing color systems and equipment and provide systems for backwards compatibility with older color systems.