Image Processing Circuitry for Clipping-Free Color Saturation
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Solution Overview
Problem
Current tools for modifying color saturation in images do not adequately assist users in selecting appropriate and safe increases, leading to potential image degradation due to over-saturation.
Innovation Solution
A method and apparatus that calculate a luminance value and two maximum saturation increases based on RGB values, using these to determine a saturation factor for increasing color saturation while avoiding clipping, thereby preserving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If color saturation is increased using conventional tools, then color saturation is improved, but image quality degrades due to over-saturation and clipping
Solution Approach 1:
The patent calculates the maximum possible saturation increase in advance before applying the saturation adjustment. By pre-computing the saturation factor based on luminance and RGB values, the system ensures that the saturation increase will not cause clipping or over-saturation, thus maintaining image quality while achieving the desired color enhancement
Solution Approach 2:
The patent incorporates feedback mechanisms by continuously monitoring the relationship between luminance, RGB values, and saturation changes. The saturation factor is dynamically adjusted based on the calculated maximum increase, ensuring that the saturation enhancement remains within safe limits and does not degrade image quality
2Ease of manufacture
If saturation factor is increased to enhance color saturation, then color saturation is improved, but RGB values may be clipped
Solution Approach 1:
The patent pre-calculates the maximum saturation factor that can be applied without causing RGB value clipping. By determining this limit in advance based on luminance and current RGB values, the system ensures that the saturation enhancement will not push any RGB values beyond their valid ranges, maintaining precision while enhancing color saturation
3Ease of operation
If conventional saturation tools are used, then color saturation can be modified, but user guidance on safe saturation increase is insufficient
Solution Approach 1:
The patent provides users with feedback information by calculating and communicating the maximum safe saturation increase based on the image's luminance and color characteristics. This feedback guides users in making informed decisions about saturation adjustment, preventing over-saturation while maintaining ease of operation
Solution Approach 2:
The patent enables self-service by automatically calculating the optimal saturation factor based on the image content itself. The system uses the image's own luminance and RGB values to determine the safe saturation increase, eliminating the need for user expertise while preventing over-saturation
Data Source
AI summary
A method of increasing the color saturation of the RGB values of at least one pixel of an image, the method involving: calculating a luminance value based on RGB values of a first pixel; calculating a first maximum increase of said color saturation based on the highest of said RGB values and on said luminance value; calculating a second maximum increase of said color saturation based on the lowest of said RGB values and on said luminance value; and increasing the color saturation of said first pixel based on said first and second maximum increases.