Oligochromatic Color Mapping via Gamut Skeleton Adaptation
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Solution Overview
Problem
Industrial digital printing systems face challenges in switching inks/toners due to residue buildup, leading to color inconsistencies in oligochromatic patterns, and adding extra ink/toner suppliers is economically unfeasible.
Innovation Solution
A fast and low memory-consumable color mapping method that determines a skeleton from the image gamut of oligochromatic patterns, allowing for effective color correction and adaptation in digital printing systems, particularly for wood patterns, by selecting luminance ranges and determining balance points within sub-image-gamuts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If industrial digital printing systems switch ink/toner to print different dominant colors, then color variety and adaptability are improved, but color consistency deteriorates due to residue buildup in ink/toner channels
Solution Approach 1:
The patent converts the harmful residue buildup in ink/toner channels into a beneficial calibration opportunity. By detecting residues through color mapping deviations and systematically adjusting color values, the system transforms the contamination problem into a controlled calibration process that maintains color consistency across ink switches.
Solution Approach 2:
The patent dynamically adjusts color parameters (chroma, luminance, hue) based on detected residue levels and printing conditions. By changing these parameters adaptively rather than using fixed color values, the system compensates for residue effects and maintains color consistency across different ink/toner switches.
2Adaptability or versatility
If extra ink/toner suppliers are added to achieve another dominant color, then color adaptability is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes the existing ink/toner supplier perform multiple functions by enabling it to print different dominant colors through digital color mapping. Instead of requiring separate physical suppliers for each color, the system universally uses the same supplier with dynamically adjusted color parameters, reducing device complexity while maintaining color versatility.
Solution Approach 2:
The patent achieves different dominant colors by changing color parameters (chroma, luminance, hue) in the digital domain rather than physically changing ink/toner suppliers. This parameter-based approach allows one supplier to fulfill multiple color requirements, eliminating the need for additional hardware components.
3Manufacturing precision
If conventional color mapping methods are used in digital printing systems, then color reproduction is attempted, but memory consumption and processing time increase
Solution Approach 1:
The patent segments the color mapping process into distinct computational stages: determining the image gamut, extracting the skeleton structure, and performing adaptive color mapping along the skeleton. This segmentation enables efficient processing by focusing computational resources on critical path elements rather than processing all pixels uniformly.
Solution Approach 2:
The patent extracts the essential color information by identifying and processing only the skeleton points that define the image gamut boundaries. By taking out these critical control points from the full image data, the system achieves accurate color reproduction with significantly reduced memory consumption and processing time.
Data Source
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AI summary
A method of color mapping color values of an oligochromatic pattern comprising the following steps: determining an image-gamut, in a N-dimensional device independent color system (ND-DICS), of said oligochromatic pattern; wherein said image-gamut comprises said color values of said oligochromatic pattern; and determining a skeleton (500) of said image-gamut; and performing an adaption on said skeleton (500) in said ND-DICS by a set of N-dimensional-transforming steps (30) and determining for points of said skeleton (500), a path in said ND-DICS that corresponds to said adaption; and color mapping said color values, of said oligochromatic pattern, based on said determined paths (35) of said points of said skeleton (500).