Color-Specific Image Sharpness Adjustment via Segmented Signal Processing
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Solution Overview
Problem
Existing methods for image sharpness adjustment do not allow independent adjustments to the sharpness of specific colors in digital color images, limiting the ability to enhance image quality by adjusting color sharpness effectively.
Innovation Solution
A method and device that analyze input color signals to generate color component signals and sharpness gains, allowing independent adjustment of sharpness for different colors by using a color analyzer, sharpness setting unit, and luminance adjusting unit, which includes a look-up table circuit, multiplexer, and noise suppression circuit to adjust luminance signals based on color sharpness gains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional image sharpness adjustment methods are used, then the overall image sharpness can be adjusted, but the sharpness of specific colors cannot be independently controlled
Solution Approach 1:
The patent segments the sharpness adjustment process by color component. It divides the color signal into different color channels (red, green, blue) and applies independent sharpness gains to each channel. This is achieved through color space transformation and separate sharpness processing for each color component, allowing color-specific sharpness control while maintaining manageable system complexity through structured processing stages.
Solution Approach 2:
The patent applies local quality by assigning different sharpness characteristics to different color regions. Instead of uniform sharpness adjustment, it enables selective sharpness enhancement for specific colors (e.g., enhancing red sharpness while keeping green and blue at different levels). This is implemented through color-based masking and selective application of sharpness gains to specific color components.
2Manufacturing precision
If independent color sharpness adjustment is implemented, then color image quality is improved, but processing complexity increases
Solution Approach 1:
The patent utilizes parameter changes by introducing color-specific sharpness gain parameters that can be independently adjusted for each color component. Instead of a single global sharpness parameter, it employs multiple parameters (red sharpness gain, green sharpness gain, blue sharpness gain) that can be varied to achieve precise color-specific control. This parameter expansion enables fine-grained precision while organizing the complexity through a systematic parameter structure.
Data Source
AI summary
The present invention discloses a method and a device for image sharpness adjustment. The device comprises a color analyzer, a color sharpness setting unit, a computing circuit, and a luminance adjusting unit. The color analyzer is for analyzing an input color signal to generate a plurality of color flags. The color sharpness setting unit is for generating a plurality of first sharpness gains according to the plurality of the color flags. The computing circuit is for generating a second sharpness gain according to the plurality of the first sharpness gains and the input color signal. The luminance adjusting unit is for adjusting a luminance signal according to the second sharpness gain.