Image Data Conversion Using CbCr Coordinate Scaling
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Solution Overview
Problem
Display panels manufactured by the same process exhibit differences in color reproducibility, leading to variations in image display despite receiving the same image data, necessitating image data conversion to compensate for these differences.
Innovation Solution
An image-data-converting device that converts RGB-type image data into YCbCr-type and back to RGB-type, utilizing a CbCr-coordinate system divided into regions by straight lines extending from a reference color to primary colors, with scaling factors determining coordinate transformations to align data with target colors, ensuring consistent color reproduction across different display panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If image data is converted using traditional methods, then color reproduction consistency is improved, but device complexity increases due to multiple converters and coordinate system transformations
Solution Approach 1:
The patent combines multiple conversion functions into a unified coordinate transformation system. The CbCr-coordinate system serves as a common reference frame that integrates the conversion from first image data to second image data and from third image data to fourth image data, eliminating the need for separate conversion pathways and reducing overall system complexity while maintaining color consistency.
Solution Approach 2:
The patent transforms image data by changing coordinate parameters within the CbCr-color space. By defining specific coordinate relationships between reference colors and primary colors, and applying linear transformation equations, the system adjusts color parameters to compensate for display panel variations, achieving consistent color reproduction across different panels through mathematical parameter adjustments rather than physical hardware changes.
2Measurement precision
If multiple converters are used for color compensation, then color accuracy is improved, but processing time increases
Solution Approach 1:
The patent performs preliminary establishment of coordinate relationships between reference colors and primary colors in the CbCr-coordinate system. By pre-defining the coordinate values and transformation parameters, the system eliminates the need for real-time complex calculations during actual image processing, thereby reducing processing time while maintaining color accuracy through pre-computed transformation equations.
3Manufacturing precision
If coordinate transformation is performed with multiple reference points, then color reproduction precision is improved, but computational complexity increases
Solution Approach 1:
The patent uses parameter changes within a standardized CbCr-coordinate system to achieve precise color reproduction. By defining linear transformation equations with pre-determined coefficients based on coordinate relationships between reference and primary colors, the system achieves high precision color compensation through simple mathematical operations rather than complex multi-point transformations, thereby reducing computational complexity while maintaining precision.
Data Source
AI summary
A device includes converters for converting first image data of an RGB-type into second image data of a YCbCr-type, into third image data of the YCbCr-type, and into fourth image data of the RGB-type, wherein a CbCr-coordinate system has six regions defined by coordinates of a reference color and of six primary colors, and when coordinates of the second image data are located in a region defined by coordinates of the reference color, a first primary color, and a second primary color, the coordinates of the second image data are determined by the coordinates of the reference color, the first primary color, the second primary color, coordinates of a target reference color corresponding to those of the reference color, coordinates of a first target primary color corresponding to those of the first primary color, and coordinates of a second target primary color corresponding to those of the second primary color.