Color Profile Synthesis for Gamut Mapping Degeneracy
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Solution Overview
Problem
Existing color mapping techniques, such as absolute colorimetric and perceptual mapping, face challenges in ensuring color impression match across different printing systems while maintaining color discriminability and gradation property, often resulting in color degeneracy where distinct colors are recognized as the same after mapping, leading to issues in recognizing identical designs across various output devices.
Innovation Solution
An information processing apparatus that generates a third color profile by combining first and second color profiles, with a parameter to increase the distance between mapped colors through gamut mapping, effectively addressing color degeneracy by synthesizing absolute colorimetric and perceptual mapping tables to ensure both color matching and discriminability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If absolute colorimetric mapping is used, then colorimetric accuracy is improved, but color discriminability deteriorates due to color degeneracy
Solution Approach 1:
The patent introduces a repulsive force parameter that acts on mapped colors to increase the distance between them. This parameter change prevents color degeneracy by ensuring that colors which are different in the input image remain distinguishable after gamut mapping, while still maintaining colorimetric accuracy for colors within the output device's gamut.
Solution Approach 2:
The patent uses a repulsive force mechanism as an intermediary between the color mapping process and the final color output. This intermediary force adjusts the positions of mapped colors in the output color space to prevent degeneracy, acting as a mediator that balances colorimetric accuracy with color discriminability.
2Reliability
If perceptual mapping is used, then color discriminability is improved, but colorimetric accuracy deteriorates
Solution Approach 1:
The patent merges absolute colorimetric mapping and perceptual mapping into a unified color profile generation process. The generated color profile incorporates both colorimetric accuracy requirements and perceptual color discriminability requirements, allowing the system to achieve both objectives simultaneously rather than choosing one over the other.
3Adaptability or versatility
If gamut mapping is applied, then color expression within device gamut is improved, but color distance and discriminability deteriorate
Solution Approach 1:
The patent introduces a repulsive force parameter specifically针对 mapped colors that increases the distance between them. This parameter change compensates for the distance reduction caused by gamut mapping, ensuring that colors remain discriminable even after being mapped into the output device's gamut.
Data Source
AI summary
Depending on a degree of color degeneracy of colors of an input image after absolute colorimetric mapping, an information processing apparatus synthesizes an absolute colorimetric mapping table and a perceptual mapping table. The information processing system can acquire a first color profile for performing colorimetric color conversion, a second color profile for performing perceptual color conversion, and a parameter for increasing a distance between colors mapped through gamut mapping, and generate, based on the first color profile and the second color profile and the parameter, a third color profile.