Color Mapping Card Generation for SDR and HDR Standards
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Solution Overview
Problem
Existing color mapping cards are limited to specific color display standards, making it challenging to use them for images with different color display standards, such as Standard Dynamic Range (SDR) and High Dynamic Range (HDR).
Innovation Solution
A method and apparatus for generating a color mapping card that transfers colors from one color space to another, using an original color mapping card under a second color display standard to create a new color mapping card suitable for a first color display standard, by converting colors through an HSV color space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a color mapping card is created under one color display standard (e.g., SDR), then it works correctly for that standard, but it produces abnormal output colors when used for images with different color display standards (e.g., HDR)
Solution Approach 1:
The patent transforms a color mapping card designed for one color display standard into a universal mapping card that can adapt to multiple color display standards (SDR, HDR, etc.). By introducing standard conversion modules, the mapping card gains the ability to automatically identify and adapt to different color standards, making a single mapping card suitable for diverse applications rather than requiring separate mapping cards for each standard.
Solution Approach 2:
The patent changes the color space parameters by converting colors between different color display standards through HSV color space as an intermediate. The system adjusts color parameters (luminance, saturation, hue) according to the target color standard, enabling the mapping card to produce accurate results across different standards by dynamically modifying color parameters.
2Reliability
If separate color mapping cards are created for each color display standard, then color mapping accuracy is maintained for each standard, but the complexity of device management increases
Solution Approach 1:
The patent creates a universal color mapping card that can handle multiple color display standards, eliminating the need for multiple separate mapping cards. The mapping card includes conversion modules that enable it to adapt to different standards dynamically, reducing device complexity while maintaining color mapping accuracy across SDR, HDR, and other standards.
Solution Approach 2:
The patent uses HSV color space as an intermediary to bridge different color display standards. By converting colors through this intermediate color space, the system can transform color parameters from one standard to another, allowing a single mapping card to serve multiple standards without requiring separate cards for each standard.
3Speed
If color mapping is performed directly without standard conversion, then processing speed is fast, but output colors become abnormal when color standards don't match
Solution Approach 1:
The patent performs preliminary color standard conversion before color mapping is applied. The system first identifies the color standard of the input image, converts the image colors to a standard color space (HSV), applies the color mapping, and then converts the result to the target color standard. This preliminary conversion ensures color accuracy while maintaining efficient processing through optimized conversion algorithms.
Solution Approach 2:
The patent introduces HSV color space as an intermediary between the source and target color standards. This intermediate representation allows for accurate color parameter transformation while maintaining processing efficiency. The conversion through HSV space enables the system to handle different color standards correctly without sacrificing processing speed, as the intermediate format simplifies the mapping operations.
Data Source
AI summary
The present disclosure provides a method for generating a color mapping card, which includes: transferring colors in a first color set to colors in a second color space of a second color display standard to obtain a second color set; mapping colors in the second color set by an original color mapping card to obtain a third color set; transferring colors in the first color set, the second color set, and the third color set to colors in an HSV color space to obtain a fourth color set, a fifth color set, and a sixth color set corresponding thereto respectively; and performing color mapping on colors in the fourth color set on the basis of colors in the fifth color set and corresponding colors in the sixth color set to generate a color mapping card under the first color display standard.