Color Conversion Unit for Time-Dependent Ink Variation
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Solution Overview
Problem
Existing color conversion processing methods for image recording technologies face challenges in accurately addressing time-dependent color variation, particularly when the stabilization time of printing media varies significantly, leading to inappropriate calibration and prolonged waiting times.
Innovation Solution
An image processing apparatus and method that include an input unit for image data and a color conversion unit capable of performing color conversion based on the time-dependent color variation characteristics of a first recording medium, allowing for the adaptation of color conversion parameters for a second recording medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If colorimetry is performed immediately after recording of a patch, then time taken for calibration is reduced, but the colorimetry result does not indicate actual recording characteristic due to unstable color
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing color conversion tables that account for time-dependent color variation characteristics before actual calibration is needed. The system uses previously recorded color variation data to predict stabilized color values, allowing immediate colorimetry without waiting for physical stabilization while maintaining measurement accuracy.
2Stability of the object's composition
If standby time is set for time-dependent color variation, then color stability is improved, but calibration time is prolonged
Solution Approach 1:
The patent uses copying by creating a virtual copy of the color stabilization process through mathematical modeling. Instead of physically waiting for color stabilization, the system copies the time-dependent color variation characteristics into a database and uses these stored characteristics to calculate corrected color values immediately, eliminating the need for actual waiting time while maintaining color stability accuracy.
3Measurement precision
If monitoring is performed on all colors in entire color gamut, then color variation prediction accuracy is improved, but device complexity and monitoring time increase
Solution Approach 1:
The patent applies segmentation by dividing the entire color gamut monitoring into discrete, manageable segments. Instead of monitoring all colors simultaneously, the system monitors representative color patches and uses the recorded time-dependent variation characteristics of these segments to predict the behavior of the entire color gamut, reducing monitoring complexity while maintaining prediction accuracy.
Data Source
AI summary
An image processing apparatus according to the present disclosure includes an input unit configured to input image data and a color conversion unit configured to, based on a time-dependent color variation characteristic of a printed image in a first recording medium, perform color conversion on the image data corresponding to time-dependent color variation of a second recording medium.