Profile Creation Device for Color Inconstancy Management
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Solution Overview
Problem
Existing profile creation methods do not account for color inconstancy, which occurs when printed materials appear differently under varying illumination conditions, requiring users to physically print and observe under multiple conditions to assess color consistency.
Innovation Solution
A profile creation device that calculates and displays color values under different illumination conditions using spectral colorimetric data, allowing users to select and preview how a specific patch will appear under various lighting conditions without actual printing, and creates a profile ensuring the patch appears as intended under the selected condition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If users physically print and observe printed matter under different illumination conditions to assess color consistency, then color inconstancy can be directly perceived, but time consumption and operational complexity increase significantly
Solution Approach 1:
The patent creates a virtual copy of the printed matter's appearance under different illumination conditions through calculation. Instead of physically printing and observing under multiple lighting conditions, the system calculates what the printed matter would appear like under various illumination conditions using spectral colorimetric data and color conversion algorithms, displaying these virtual appearances on screen for comparison.
Solution Approach 2:
The patent performs preliminary calculation and display of color appearances under different illumination conditions before actual printing takes place. By computing and displaying the expected color variations in advance, users can assess color consistency and make adjustments before committing to physical printing, thereby avoiding repeated printing trials.
2Measurement precision
If users physically print and observe printed matter under different illumination conditions to assess color consistency, then accurate color perception is achieved, but the number of operations and device complexity increase
Solution Approach 1:
The patent replaces the mechanical/physical system of actual printing and physical observation under different lighting conditions with a computational system. The system uses spectral colorimetric data, illumination condition parameters, and color conversion calculations to simulate and display virtual color appearances, eliminating the need for physical printing and manual observation under multiple lighting environments.
3Productivity
If a profile is created without considering color inconstancy, then profile creation is simpler and faster, but color consistency under different illumination conditions cannot be ensured
Solution Approach 1:
The patent performs preliminary assessment of color consistency under different illumination conditions during the profile creation process itself. By calculating and displaying how the specific color will appear under various illumination conditions before finalizing the profile, users can evaluate color consistency and adjust settings in advance, ensuring reliable color performance without requiring post-profile adjustments or repeated printing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables users to grasp and manage color inconstancy effectively before printing, saving effort and ensuring color consistency across different illumination conditions.
Implementation Method 1
a first calculation unit configured to use spectral colorimetric data for a specific patch printed as a specific color to calculate a color value under each of the plurality of illumination conditions
Implementation Method 2
Color inconstancy refers to a phenomenon in which color appearances differ in a case where a printed matter is observed under different illumination conditions
Data Source
AI summary
The present invention accepts an input of a temporary condition, which is an illumination condition temporarily selected by a user from a plurality of illumination conditions, uses spectral colorimetric data for a specific patch printed as a specific color to calculate a first color value, which is a color value under each of the plurality of illumination conditions, calculates, by using the first color value, a second color value, which is a color value indicating an appearance of a printed matter printed to appear as the specific color under the temporary condition, which is an illumination condition other than the temporary condition, displays color information indicated by the second color value, accepts an input of an illumination condition permanently selected by the user from the plurality of illumination conditions, and creates a profile such that the specific patch is observed as the specific color under the illumination condition permanently selected.