Color Processing Device for Digital Offset 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, requiring a method to generate a color conversion profile through colorimetry on color patches and apply it to ensure consistent output.
Innovation Solution
A color processing device with sections for acquiring color data, correcting misregistration, and generating conversion relationships between different image forming devices to adjust colors, ensuring that output from one device matches the colors produced by another.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If color conversion profile is generated through colorimetry on color patches, then color consistency between different image forming devices is improved, but the complexity of the color adjustment process increases
Solution Approach 1:
The system performs colorimetry measurements and generates color conversion profiles in advance before actual printing operations. By pre-characterizing the color behavior of each image forming device and creating conversion profiles beforehand, the system eliminates the need for complex real-time color adjustments during printing, thus improving color consistency while managing process complexity through advance preparation
Solution Approach 2:
The patent introduces color conversion profiles as an intermediary element that mediates between different image forming devices. These profiles act as a translation layer that converts color data from one device's color space to another's, enabling color consistency without requiring direct complex interactions between devices during the printing process
2Measurement precision
If misregistration correction is performed in regions with high color variation, then color matching accuracy is improved, but the processing time increases
Solution Approach 1:
The system applies misregistration correction selectively only to regions exhibiting high color variation, rather than processing the entire image uniformly. By identifying and targeting specific problematic regions for correction while leaving other areas unchanged, the system improves color matching accuracy where needed while minimizing the overall processing time
Solution Approach 2:
The patent implements partial action by performing misregistration correction only on portions of the image that require it (regions with high color variation). This selective approach applies correction exactly where necessary rather than excessively processing the entire image, thus achieving accurate color matching while reducing unnecessary processing time
Data Source
AI summary
A color processing device includes a color data acquisition section that acquires color data of a first image output by a first image forming device on a basis of image data, a variation acquisition section that acquires a degree of color variation of the image data, a misregistration acquisition section that acquires an amount of misregistration between the image data and the color data in a region exhibiting a high degree of color variation, a first-relationship generation section that generates, after misregistration correction, a first relationship in a region exhibiting a low degree of color variation, and a conversion relationship generation section that generates a conversion relationship in accordance with the first relationship and a second relationship provided for a second image forming device such that colors of a second image to be output by the second image forming device and the first image are made to match.