Spot Color Conversion Segmentation for Profile Updates
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Solution Overview
Problem
Existing color conversion processing methods require updating all spot color information when an output profile is updated, leading to tedious and time-consuming data management and reduced reproduction accuracy of spot colors.
Innovation Solution
A color conversion processing apparatus and method that separates the first color conversion process using spot color information from a second process using reference and updated profiles, allowing for accurate color reproduction while simplifying data management by reflecting updated profile results without changing the spot color information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all spot color information is updated when output profile is updated, then color reproduction accuracy is maintained, but data management becomes tedious and time-consuming
Solution Approach 1:
The patent segments the color conversion process into two independent parts: (1) conversion of spot color information using a first color conversion table, and (2) conversion of process color information using a second color conversion table. This segmentation allows the spot color information to remain static while the process color information is updated through profile changes, resolving the contradiction between maintaining accuracy and reducing management time.
Solution Approach 2:
The patent extracts the spot color information handling from the general profile update process. By separating spot color conversion (using first color conversion table) from process color conversion (using second color conversion table), the system allows profile updates to affect only the process color portion, leaving spot color information unchanged and thus avoiding tedious updates of all spot color data.
2Measurement precision
If output profile is updated, then color conversion accuracy is improved, but spot color information consistency is reduced
Solution Approach 1:
The patent divides the color conversion into two independent pathways: one for spot colors (using first color conversion table) and one for process colors (using second color conversion table). This segmentation ensures that profile updates affecting the second table do not disrupt the consistency of spot color information stored in the first table, maintaining both accuracy and consistency simultaneously.
Solution Approach 2:
The patent introduces two separate color conversion tables as intermediaries: the first color conversion table for spot color information and the second color conversion table for process color information. This intermediary structure allows the system to maintain spot color consistency while applying updates to process color conversion, resolving the contradiction between accuracy improvement and information consistency.
3Measurement precision
If spot color information is updated along with profile changes, then color accuracy is maintained, but processing complexity increases
Solution Approach 1:
The patent segments the processing into two independent conversion stages: first converting spot color information using the first color conversion table, then converting process color information using the second color conversion table. This segmentation simplifies processing by allowing profile updates to be applied only to the second conversion stage, reducing overall processing complexity while maintaining color accuracy.
Solution Approach 2:
The patent extracts the spot color conversion step from the main profile update process. By separating spot color information conversion (using first color conversion table) from the profile-driven process color conversion (using second color conversion table), the system reduces processing complexity by eliminating the need to reprocess spot color information during profile updates.
Data Source
AI summary
A color conversion processing apparatus acquires spot color information, which is capable of defining a spot color with device-dependent color values. The color conversion processing apparatus further acquires a reference profile and an updated profile, and using the spot color information, converts an image signal of a spot color plate into a first image signal of a process color plate. Then, by having the reference profile and the updated profile act successively thereon, the color conversion processing apparatus converts the first image signal into a second image signal of a process color plate.