Color Processing Device for Digital Printing Color Matching
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Solution Overview
Problem
In the context of on-demand digital printing, there is a need to adjust the colors of printed materials to match those produced by offset printing machines, which requires generating a color conversion profile through colorimetry on color patches and applying the same print output settings to ensure color consistency across different printing devices.
Innovation Solution
A color processing device is designed with a color-data acquisition section, a conversion-relationship generation section, a correction-image-data generation section, and a conversion-relationship correction section to acquire, generate, and correct conversion relationships between different image forming devices, enabling color adjustment to match the colors of one device with those of another.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If color conversion profile is generated through colorimetry on color patches, then color accuracy between different printing devices is improved, but the process complexity and time required for color matching increases
Solution Approach 1:
The system performs preliminary color measurement and conversion relationship generation in advance. The color measurement section measures color patches printed by the first image forming device, and the conversion relationship generation section creates the initial color conversion profile before actual printing operations, enabling faster color matching during production
Solution Approach 2:
The system implements iterative feedback correction where the color measurement section continuously measures color patches, compares measured colors with target colors, and the conversion relationship correction section adjusts the color conversion profile based on measurement results. This closed-loop feedback process gradually improves color accuracy without requiring complete re-measurement
2Measurement precision
If color conversion profile is generated through colorimetry on color patches, then color consistency across different printing devices is improved, but the time required for color matching increases
Solution Approach 1:
The color conversion relationship is generated in advance through preliminary color measurements. The system measures color patches and establishes the conversion profile before actual printing jobs, so that during production, only iterative corrections are needed rather than complete re-measurement, significantly reducing time requirements
Solution Approach 2:
The iterative feedback mechanism allows the system to start with a pre-generated conversion profile and make incremental adjustments based on actual color measurements. This approach is much faster than generating the complete conversion profile from scratch each time, while still achieving consistent color matching across different devices
Data Source
AI summary
A color processing device includes a color-data acquisition section, a conversion-relationship generation section, a correction-image-data generation section, and a conversion-relationship correction section. The color-data acquisition section acquires color data of a first image output by a first image forming device. In accordance with a first relationship and a second relationship, the conversion-relationship generation section generates a conversion relationship used for color adjustment performed to match a color of a second image to be output by a second image forming device on a basis of unadjusted image data with a color of the first image. The correction-image-data generation section generates, on a basis of the unadjusted image data, correction image data for correcting the conversion relationship. The conversion-relationship correction section performs correction of the conversion relationship on a basis of color data of correction images output by the second image forming device by using the correction image data.