Color Management Virtual Space for Dynamic Gamut Adaptation
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Solution Overview
Problem
Existing color management systems for printing struggle to efficiently manage gamut adaptation, color separation, linearization, ink limitations, and image adaptation, especially when dealing with more than three color dimensions or non-traditional ink colors, leading to issues like visible artifacts and difficulty in predicting post-printing operations.
Innovation Solution
The implementation of a virtual space, such as vRGB, that allows for full color representation and separation of ink influences, enabling operators to view and adjust ink layers independently. This virtual space facilitates a unique relationship between virtual LCh and nCLR data, allowing for dynamic gamut adaptation and precise color management without the need for complex multi-dimensional space management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a static ICC profile LUT is used for color management, then the system is simple to implement, but it cannot adapt to dynamic gamut adaptation or changes in printing conditions
Solution Approach 1:
The color management system is segmented into separate functional modules: gamut adaptation module, color separation module, linearization module, ink limitation module, and image adaptation module. Each module handles a specific aspect of color management independently, allowing dynamic adjustment of individual functions without affecting the entire system. This modular approach enables adaptability while maintaining manageable complexity through clear separation of concerns.
2Ease of operation
If color separation is performed in traditional CMYK space, then operators can easily understand and retouch images, but it becomes very complex when dealing with more than four colors (nCLR)
Solution Approach 1:
The system introduces an intermediate virtual color space that acts as a mediator between the input image and the nCLR separation process. This virtual space provides a simplified representation that maintains the intuitive properties of traditional color spaces while accommodating arbitrary numbers of color channels. Operators can work in this intermediate space with familiar concepts, and the system automatically handles the complex nCLR separation transformations, thus maintaining ease of operation while managing multicolor complexity.
3Ease of operation
If all color management operations are combined in one ICC profile, then the system is simple and static, but it cannot allow separate adjustment of individual operations
Solution Approach 1:
The color management operations are segmented into distinct adjustable modules, each handling a specific function (gamut adaptation, color separation, linearization, ink limitations, image adaptation). This segmentation allows operators to independently configure and adjust each operation according to specific printing requirements, providing fine-grained control while maintaining a structured system architecture that manages complexity through functional decomposition.
4Adaptability or versatility
If achromatic inks like white ink on colored support or metallic ink are used, then creative operations can be performed, but it is difficult to visualize and determine the presence and quantity of these inks before separation
Solution Approach 1:
The system employs visualisation techniques that assign distinctive color representations to achromatic and special inks (white, metallic, varnish) in the virtual color space. These special inks are displayed with unique visual characteristics that differentiate them from standard color inks, allowing operators to easily identify their presence, location, and quantity before the separation process. This color coding strategy maintains creative versatility while solving the visualization challenge of non-traditional inks.
Data Source
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AI summary
In a color printing environment, functions for printing color management are dissociated. An abstraction layer is also provided to facilitate setting and evaluation of all factors relating to color print and prediction.