Dynamic GCR Rate Adjustment for Balanced Graininess and Color
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Solution Overview
Problem
There is a trade-off between graininess and color reproducibility in images when replacing non-black components with a black component, making it difficult to achieve a balanced combination of both, and existing methods that decrease the black component proportion with increasing saturation lead to deteriorated color reproducibility.
Innovation Solution
An information processing apparatus that determines the proportion of the black component based on image brightness, adjusting the Gray Component Replacement (GCR) rate to minimize its impact as saturation increases, thereby maintaining a balanced graininess and color reproducibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the proportion of black component is monotonically decreased as saturation increases, then graininess is improved, but color reproducibility degrades more than necessary
Solution Approach 1:
The patent applies dynamics by transitioning from a monotonic decrease of black component proportion to a non-monotonic variation. The proportion first decreases to a minimum value as saturation increases, then increases again when saturation becomes high. This dynamic adjustment allows the system to optimize graininess at moderate saturation while maintaining color reproducibility at high saturation levels.
Solution Approach 2:
The patent changes the parameter behavior from a simple monotonic function to a more complex non-monotonic function. By introducing a minimum value point in the saturation-proportion relationship, the system can independently optimize for graininess (at low proportion values) and color reproducibility (at appropriate proportion values), resolving the trade-off between these two parameters.
2Object-affected harmful factors
If the proportion of black component is decreased to improve graininess, then the black component proportion is reduced, but color reproducibility deteriorates
Solution Approach 1:
The system dynamically adjusts the black component proportion based on saturation levels. At low to moderate saturation, the proportion is decreased to improve graininess. At high saturation, the proportion is increased to maintain color reproducibility. This dynamic behavior allows simultaneous optimization of both graininess and color reproducibility.
Solution Approach 2:
The patent introduces a non-monotonic parameter relationship where the black component proportion has a minimum value at a specific saturation level. This parameter change enables the system to achieve optimal graininess (low proportion) while preserving color reproducibility (appropriate proportion) in different saturation ranges.
Data Source
AI summary
An information processing apparatus includes a processor configured to, in accordance with a proportion of a black component with which to replace one or more non-black components that are color components other than the black component, replace the one or more non-black components with the black component for an image. The proportion of the black component is determined by brightness of the image, and when saturation of the image varies in a saturation range, the proportion decreases to a minimum value of the proportion with increasing saturation of the image and increases with increasing saturation of the image after the proportion decreases to the minimum value of the proportion.