Profile Adjustment Using Target Color Conversion Module
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Solution Overview
Problem
Existing color management systems, particularly in ink jet-type printers, face challenges in achieving accurate color reproduction due to errors in profiles, measurement errors, and fluctuations in printing devices, leading to deviations in intended colors even with adjusted profiles.
Innovation Solution
A profile adjustment method that involves setting a target color conversion module to convert input coordinate values from an input color space to an output color space, allowing for the adjustment of profiles to achieve intended color conversion results by selecting the appropriate interpolation methods and conversion paths, thereby improving color reproduction accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If different color conversion modules are used for profile adjustment and RIP, then profile adjustment can be performed, but output colors deviate from intended colors
Solution Approach 1:
The patent introduces a profile adjustment target value generation unit that acts as an intermediary. This unit generates target values using the same color conversion module as the RIP, ensuring consistency. The profile adjustment is then performed by comparing actual conversion results against these target values, eliminating the deviation problem caused by using different color conversion modules.
2Manufacturing precision
If spot color adjustment is performed by modifying ICC profile, then color reproduction accuracy is improved, but errors in profile, measurement errors, and printer fluctuations still cause deviations
Solution Approach 1:
The patent implements a feedback mechanism where the profile adjustment execution unit performs color conversion using the target color conversion module, compares the conversion results with target values generated by the same module, and adjusts the profile based on the differences. This closed-loop feedback approach compensates for profile errors, measurement errors, and printer fluctuations, thereby improving both accuracy and reliability.
3Adaptability or versatility
If color conversion module is selected from multiple available modules, then compatibility with different systems is improved, but color conversion results vary depending on the selected module
Solution Approach 1:
The patent applies local quality by having different color conversion modules used for different purposes: the target color conversion module is used specifically for generating target values and performing profile adjustment, while other modules can be used for general color conversion. This ensures that the critical profile adjustment process uses a consistent, known module, maintaining precision while allowing system versatility.
Data Source
AI summary
A profile adjustment method for causing a computer to execute a process of adjusting a to-be-adjusted profile by using a color conversion module performing a color conversion process of converting coordinate values in a color space with reference to a profile, the profile adjustment method including: setting a color conversion module included in one or more of the color conversion module, as a target module that is a color conversion module to be used; causing the target module to execute the color conversion process of converting input coordinate values in an input color space into output coordinate values in an output color space; and executing a process of using a conversion result by the target module to adjust the to-be-adjusted profile.