Color Matching Profile Generation Using Absolute Color Space
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing color matching systems for display devices are complex and require advanced knowledge, limiting their implementation and color reproducibility, especially in devices like camera-mounted cellular phones, where accurate color reproduction across input and output devices is needed without relying on device-specific characteristics.
Innovation Solution
A color matching system that generates a color matching profile based on input and output device profiles, allowing for color conversion in an absolute color space, independent of device characteristics, and includes a method for updating profiles based on device deterioration and environmental lighting conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If ICC profile color matching mechanism is implemented, then color conversion between display devices is achieved, but implementation complexity increases and requires advanced knowledge
Solution Approach 1:
The patent introduces an absolute color space as an intermediary reference system between the input device color space and output device color space. Instead of directly converting between device-specific color spaces, the system uses the absolute color space as a mediator to establish color relationships, thereby simplifying the color matching process and reducing implementation complexity while maintaining accuracy
Solution Approach 2:
The color matching process is segmented into distinct steps: first converting input device image data to the absolute color space, then converting from the absolute color space to the output device color space. This segmentation allows each conversion step to be handled independently using simpler transformation matrices, reducing the overall system complexity
2Reliability
If device-specific color matching is performed, then color reproduction within the apparatus is achieved, but color reproducibility across different devices is limited
Solution Approach 1:
The patent establishes a universal absolute color space that serves as a common reference for multiple different input and output devices. This universal color space enables the system to handle color matching across various device types (cameras, displays, printers) with a unified approach, thereby improving both reliability within a device and adaptability across different devices
3Manufacturing precision
If complex color reproduction algorithm is used, then accurate color reproduction is achieved, but processing ability requirements increase
Solution Approach 1:
The patent employs computationally efficient 3×3 matrix transformations instead of complex color reproduction algorithms. These simple mathematical operations can be performed with minimal processing power, making the system suitable for mobile devices with limited computational resources while still achieving accurate color reproduction through the absolute color space methodology
Data Source
AI summary
Aspects of the invention provide a color matching profile generating device that, in an apparatus having an input device and an output device, performs a color matching for the input device and the output device and reproduces favorable colors without depending on color characteristics of the devices. The color matching profile generating device can use an input device profile and an output device profile, in addition to a color conversion profile which defines color conversion characteristics in an absolute color space and generates a color matching profile for the input device and the output device. Since the color conversion profile defines the color conversion characteristics in the absolute color space, color conversion can be performed to image data obtained from the input device without depending on characteristics of the input device. Accordingly, by performing a color matching process with the generated color conversion profile, image data can be output with color characteristics determined in the absolute color space, irregardless of characteristics of the output device.