Color Adjustment Apparatus Using Spectral Data for Display Calibration
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Solution Overview
Problem
Adjusting the color profile of a display to match colors on a printing medium is time-consuming and labor-intensive, especially when multiple types of printing media are used, and existing methods may result in discrepancies between measured color values due to differences in spectral distribution characteristics between printing media and displays.
Innovation Solution
A color adjustment apparatus that uses a processor to acquire desired color measurement values by inputting medium color measurement values and spectral distribution characteristics into a trained color measurement value calculation model, which outputs information to adjust the display's color profile, ensuring equivalence between colors on the printing medium and display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual adjustment of color profile is performed for each printing medium, then color matching accuracy is improved, but time consumption and labor effort increase significantly
Solution Approach 1:
The system performs preliminary measurements of spectral distribution characteristics for each printing medium and stores them in advance. When color matching is needed, the pre-stored spectral data is retrieved and used to automatically calculate the color profile adjustment parameters, eliminating the need for repeated manual measurements and adjustments for each printing medium.
Solution Approach 2:
The patent introduces spectral distribution characteristics as an intermediary parameter that bridges the gap between printing medium properties and display color output. By measuring and utilizing the spectral characteristics of the printing medium, the system can predict and adjust display color profiles automatically, serving as a mediator that enables accurate color matching without direct manual intervention.
2Productivity
If automatic color profile adjustment is performed based on matching medium color measurement value and display color measurement value, then time consumption is reduced, but appearance discrepancy between printed color and displayed color increases
Solution Approach 1:
The system changes from using only color measurement values (XYZ or Lab) to incorporating spectral distribution characteristics (wavelength-by-wavelength intensity data) as additional parameters. This parameter expansion allows the automatic adjustment algorithm to account for the spectral differences between printing media and displays, maintaining color appearance accuracy while preserving automation efficiency.
3Device complexity
If color profile adjustment is performed without considering spectral distribution characteristics, then the adjustment process is simplified, but color equivalence between printing medium and display cannot be achieved
Solution Approach 1:
The system creates a digital copy or model of the printing medium's spectral distribution characteristics and uses this model to simulate and predict color appearance on the display. By working with the spectral model rather than physical samples, the system maintains reliability in color equivalence assessment while keeping the adjustment process manageable through automated computation.
Data Source
AI summary
A color adjustment apparatus includes a processor configured to: acquire desired color measurement value information about a target display by inputting a medium color measurement value of a target printing medium and spectral distribution characteristics of a specific color on the target display to a color measurement value calculation model that has been trained, using learning data including a combination of a medium color measurement value obtained by measuring a specific color on a printing medium, display color measurement value information indicating a display color measurement value obtained by measuring the specific color on a display that has been adjusted to be displayed as a color equivalent to the specific color on the printing medium, and spectral distribution characteristics of the specific color on the display before the adjustment is performed, based on the medium color measurement value of the printing medium and the spectral distribution characteristics of the display, to output the desired color measurement value information, which indicates the display color measurement value obtained when the specific color on the display is displayed as the color equivalent to the specific color on the printing medium; and adjust, based on the desired color measurement value information about the target display, a color profile of the target display.