Six-Primary Display Color Mapping for Wider Gamut Accuracy
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Solution Overview
Problem
Existing RGB color systems have limitations in achieving a wide gamut and efficient color reproduction, necessitating improvements for enhanced color representation.
Innovation Solution
A system utilizing a six-primary color system with a set of image data in Yxy color space, including luminance (Y) and two colorimetric coordinates (x,y), processed through non-linear functions and encoded/decoded for display on viewing devices, allowing for increased color gamut and improved color representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a traditional RGB three-primary color system is used, then the system complexity is low and ease of manufacture is high, but the color gamut is limited and color representation accuracy is insufficient
Solution Approach 1:
The color system is segmented from traditional three primaries (RGB) to six primaries (RGB + CMY), dividing the color reproduction task into more specialized components. Each primary color channel handles specific portions of the color spectrum, enabling wider gamut coverage through coordinated operation of multiple specialized channels
Solution Approach 2:
The color space is expanded from three-dimensional RGB to six-dimensional color space by adding three complementary primaries. This dimensional expansion allows representation of colors that lie outside the traditional RGB gamut, achieving wider color coverage through increased degrees of freedom
2Measurement precision
If a six-primary color system is implemented, then color gamut and color representation are improved, but the processing complexity and computational requirements increase
Solution Approach 1:
The system transforms color data by changing parameters from traditional RGB values to Yxy color space coordinates, applying non-linear functions to map between different color representations. This parameter transformation enables accurate color reproduction in the expanded six-primary space while maintaining compatibility with standard colorimetric systems
Solution Approach 2:
The Yxy color space serves as an intermediary representation between input image data and the six-primary display output. By using Y (luminance) and xy (chromaticity coordinates) as intermediate parameters, the system facilitates accurate color transformation and gamut mapping without requiring direct complex six-primary calculations at every processing stage
3Measurement precision
If color data is encoded and decoded through non-linear functions, then color accuracy is improved, but processing time and computational energy increase
Solution Approach 1:
Non-linear transfer functions and color space transformations are applied in advance to the image data before it reaches the display device. By pre-processing the color data through Yxy conversion and non-linear corrections, the system ensures color accuracy is established upfront, reducing the need for real-time computational adjustments during display operation
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.