Color Conversion Information Generation for Printing Accuracy
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Solution Overview
Problem
Existing color conversion methods require frequent correction processes when printing apparatus-independent colors, increasing the time and load required for outputting these colors, as they need to convert and correct coordinate values between different color spaces, which is inefficient.
Innovation Solution
A method and apparatus for generating color conversion information by receiving a coordinate value in one color space, converting it to another, acquiring colorimetric data, determining target values, and retrieving optimal values to minimize color differences, thereby reducing the need for frequent corrections during the printing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If correction information is used to accurately convert apparatus-independent colors, then color accuracy is improved, but processing time increases
Solution Approach 1:
The patent creates a correction information creation unit that generates correction information in advance and stores it in a correction information storage unit. During actual color conversion, the pre-generated correction information is directly applied without real-time calculation, thus maintaining color accuracy while reducing processing time.
Solution Approach 2:
The patent creates a standardized correction information template that can be copied and applied to multiple apparatus-independent colors. Instead of generating unique correction information for each color, the same correction template is reused across different color conversion tasks, significantly reducing processing time while maintaining accuracy.
2Measurement precision
If frequent correction processes are performed, then color accuracy is improved, but system load increases
Solution Approach 1:
The patent extracts the correction information generation process from the real-time color conversion workflow. By separating correction information creation (performed once) from color conversion (performed repeatedly), the system avoids the high computational load of frequent corrections while maintaining accuracy through the use of pre-generated correction data.
Solution Approach 2:
The correction information is generated and stored in advance before actual color conversion operations. This preliminary action eliminates the need for repeated correction calculations during color conversion, thereby reducing system load while preserving color accuracy through the application of pre-computed correction factors.
3Productivity
If standard conversion information is used, then processing speed is improved, but color accuracy deteriorates
Solution Approach 1:
The patent introduces correction information as an intermediary between standard conversion information and the final color output. The standard conversion information provides fast processing, while the correction information acts as a mediator to adjust and refine the results, thereby maintaining both processing speed and color accuracy.
Data Source
AI summary
A color conversion information generation apparatus converts a first coordinate value into a second coordinate value in a second color space by using first conversion information, acquires a colorimetric coordinate value in a first color space indicating a colorimetric result of an image output by a first output apparatus according to the second coordinate value, converts the second coordinate value into a third coordinate value by using second conversion information, determines a target coordinate value indicating a target color in the first color space based on the third coordinate value and a difference between the first coordinate value and the colorimetric coordinate value, retrieves a fourth coordinate value satisfying a condition that a color difference between a fifth coordinate value in the first color space obtained by converting a fourth coordinate value in the second color space by using the second conversion information and the target coordinate value is smaller than a color difference between the third coordinate value and the target coordinate value, and generates color conversion information used to convert the first coordinate value or a name of a color into a coordinate value in the second color space based on the first coordinate value and the fourth coordinate value satisfying the condition.