Metallic Color Output Profiles Without Spot Color Workflow
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Solution Overview
Problem
Existing printing technologies face challenges in reproducing metallic colors effectively, particularly in electrophotography, due to the opacity of metallic toners overshadowing lower layers and the need for complex workflows and specialized tools, leading to inefficiencies and high costs.
Innovation Solution
An image processing system that generates a five-color output profile for metallic colors, allowing seamless integration with user workflows by converting CMYK or RGB data into device-independent space, specifying an output profile for metallic toners, and separating print data into five plates, including a metallic colorant, without spot color specification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If metallic toner is used in electrophotography to reproduce metallic colors, then metallic effect can be achieved, but the high opacity of metallic toner covers and shields the lower layer, making the metallic effect ineffective for shadow colors or high-saturation colors
Solution Approach 1:
The patent applies partial action by selectively using metallic toner only in highlight areas (light reflection portions) rather than uniformly across the entire image. The color separation process determines metallic toner application based on local color characteristics, applying it partially where metallic effect is needed (highlights) and avoiding it where it would be harmful (shadow areas or high-saturation colors), thus resolving the opacity shielding problem while maintaining metallic color reproduction in appropriate regions
Solution Approach 2:
The patent implements local quality by making the metallic toner application location-dependent. Different regions of the image receive different treatments: highlight areas receive metallic toner for authentic metallic effect, while shadow and high-saturation areas use only process colors. This localized approach ensures metallic effect is reproduced only where visually appropriate, avoiding the harmful shielding effect in regions where it would compromise color accuracy
2Ease of manufacture
If spot color specification is used for metallic colors in image data, then metallic color printing can be facilitated, but it requires special image editing tools such as Photoshop and skills, which is a burden on the print ordering side
Solution Approach 1:
The patent applies self-service by enabling the image forming apparatus to automatically perform metallic color separation and profile conversion without requiring user intervention for spot color specification. The system autonomously analyzes the input image, determines metallic color regions, and applies appropriate color separation algorithms, thereby facilitating metallic color printing while eliminating the need for special image editing tools and skills on the user side
Solution Approach 2:
The patent implements preliminary action by pre-configuring metallic color output profiles and color separation algorithms within the image forming apparatus. The system prepares metallic color reproduction capabilities in advance through built-in profile management and automatic color separation processes, so that when a user simply provides standard CMYK or RGB image data, the metallic color printing is automatically achieved without requiring preliminary spot color specification or special editing
3Ease of operation
If five-color output profile is generated for metallic colors, then metallic printing can be performed without spot color specification, but the existing five-color output profile is not in line with the workflow actually performed by the user at the time of printing
Solution Approach 1:
The patent applies universality by creating a multi-functional color management system that handles both standard CMYK printing and metallic color printing through a unified workflow. The image forming apparatus can process standard color images using conventional profiles while simultaneously supporting metallic color reproduction through automatically generated five-color output profiles, making the system adaptable to different printing requirements without requiring separate specialized workflows or tools
Data Source
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AI summary
An image processing system (1000) includes an acquisition unit (202), an input profile specification unit (201), an output profile specification unit (201), a generation unit (203), and an image output apparatus (400). The acquisition unit (202) acquires print data of CMYK or RGB without a spot color specification. The input profile specification unit (201) specifies an input profile to convert the print data into a color value in a device-independent space. The output profile specification unit (201) specifies an output profile for a metallic colorant. The generation unit (203) separates the print data into five or more plates including the metallic colorant based on the specified input profile and the specified output profile to generate data for a printed material. The image output apparatus (400) outputs the printed material.