Color Correction Device Reducing Turbidity in Printing
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Solution Overview
Problem
Existing color correction techniques in printing devices do not adequately address color turbidity and graininess, particularly when converting input colors to output colors, as they fail to effectively select and correct for non-present color components, especially in tertiary and higher-order colors.
Innovation Solution
A color correction device and method that includes a color conversion unit, a selection unit for choosing target color components, and a correction unit to reduce non-present color components in the output value, allowing for the generation of printing data that minimizes color turbidity and graininess by specifically targeting and reducing unwanted color components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If color conversion is performed without pure color protection, then color accuracy is improved, but color turbidity and graininess occur
Solution Approach 1:
The patent applies local quality by selectively protecting only specific color components (C, M, Y, K) that are present in the input color data, while allowing other color components to be converted normally. This selective protection approach reduces color turbidity and graininess for the protected components while maintaining color accuracy for the overall conversion process.
Solution Approach 2:
Instead of protecting all color components uniformly, the patent inverts the approach by identifying which color components should be protected based on their presence in the input data, and applying protection only to those specific components. This inversion of the traditional pure color protection method achieves better color accuracy while reducing harmful effects.
2Object-generated harmful factors
If traditional pure color protection is applied, then color turbidity is reduced, but color difference between input and output increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the protection level for each color component based on its presence in the input data. When a color component is present in the input, it is protected; when absent, it is not protected. This parameter-based approach reduces color turbidity while minimizing color difference by adapting the protection strategy to the specific input characteristics.
3Object-generated harmful factors
If color purification process is applied to all colors, then color turbidity is reduced, but processing complexity increases
Solution Approach 1:
The patent applies partial action by implementing color purification only for color components that are present in the input data, rather than applying it universally to all components. This selective application reduces processing complexity by avoiding unnecessary operations on components that would not affect the final output quality.
Data Source
AI summary
A color correction device includes: a color conversion unit configured to convert an input value in an input color space into an output value in an output color space; a selection unit configured to receive a selection, as a target color component, of one or more color components among a plurality of color components used in a printing device; and a correction unit configured to correct the output value in a manner of reducing the target color component when the input value represents a color not including the target color component.