Color Mapping Card Generation Across SDR and HDR Color Spaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing color mapping cards are limited to a single color display standard and cannot effectively map colors across different standards, such as Standard Dynamic Range (SDR) and High Dynamic Range (HDR), leading to abnormal luminance issues when used across different color spaces.
Innovation Solution
A method and apparatus for generating a color mapping card that transfers colors between color spaces, using an original color mapping card to map colors from one color display standard to another, allowing the creation of a color mapping card suitable for a different color display standard by transferring colors through multiple steps involving color sets and corresponding relationships.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a color mapping card is created under one color display standard (e.g., SDR), then it can accurately map colors within that standard's color space, but it cannot be used to map colors in other color spaces (e.g., HDR) without producing abnormal luminance
Solution Approach 1:
The patent creates a universal color mapping card that can function across multiple color display standards (SDR, HDR, HLG) by incorporating color mapping relationships for different color spaces into a single card structure. The card is designed with multi-functional capability to handle various color display standards without requiring separate dedicated cards for each standard.
Solution Approach 2:
The patent employs parameter changes by adjusting color mapping parameters (such as luminance, saturation, and color temperature) to adapt to different color display standards. The color mapping card stores multiple sets of mapping parameters that can be selected or automatically applied based on the target color space requirements.
2Productivity
If color mapping is performed using a single-standard color mapping card, then the process is simple and fast, but the output colors exhibit abnormal luminance when mapping across different color spaces
Solution Approach 1:
The patent performs preliminary actions by pre-calculating and storing color mapping relationships for multiple color spaces (SDR, HDR, HLG) within the color mapping card during its creation phase. This preliminary preparation enables the card to directly apply appropriate mappings during actual color conversion operations without requiring complex real-time calculations, thus maintaining high processing speed while ensuring accurate luminance output.
3Manufacturing precision
If separate color mapping cards are created for each color display standard, then color mapping accuracy is maintained for each standard, but the device complexity and number of required cards increase
Solution Approach 1:
The patent merges color mapping functionality for multiple color display standards into a single integrated color mapping card. The card structure combines mapping relationships for SDR, HDR, HLG and other color spaces, eliminating the need for multiple separate cards. This merging approach reduces device complexity while preserving color mapping accuracy through the use of standardized color space transformation matrices and lookup tables.
Data Source
AI summary
The present disclosure provides a color mapping card generating method, which includes: transferring colors in a first color set into colors in a second color space of a second color display standard, to acquire a second color set, the first color set includes colors in a first color space of a first color display standard; mapping colors in the second color set through an original color mapping card, to acquire a third color set, the original color mapping card is a color mapping card under the second color display standard; transferring colors in the third color set into colors in the first color space, to acquire a fourth color set; and generating a color mapping card under the first color display standard.