Image Processing Method Using CIELCH Color Space Conversion
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Solution Overview
Problem
Direct adjustment of RGB color space can lead to image distortion and generation of un-displayable pixel data when converting back to RGB, affecting image quality.
Innovation Solution
Converting pixel data to the CIELCH color space, performing image adjustments within the determined display space, and then converting back to the original color space to ensure correct and displayable pixel data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If pixel data is adjusted directly in RGB color space, then image processing is simple, but image distortion occurs and pixel data may become un-displayable
Solution Approach 1:
The patent introduces CIELCH color space as an intermediary between RGB color space and the final display output. Pixel data is converted from RGB to CIELCH for processing, where adjustments can be made without causing distortion or un-displayable values. The CIELCH color space acts as a mediator that decouples the processing operations from the constraints of the RGB color space, allowing reliable image processing while maintaining display compatibility.
2Manufacturing precision
If color saturation is increased to obtain brighter color and clearer image, then image quality improves, but pixel data may exceed the viewable range
Solution Approach 1:
The patent changes the color space parameters from RGB to CIELCH, where the L (lightness), C (chroma), and H (hue) parameters provide a more suitable framework for image quality enhancement. In CIELCH space, increasing color saturation corresponds to increasing the C parameter while keeping L and H within their valid ranges, ensuring that pixel data remains within the viewable range while achieving brighter and clearer images.
3Stability of the object's composition
If image processing is performed in other color space to decrease distortion, then image integrity is maintained, but conversion back to RGB may produce un-displayable pixel data
Solution Approach 1:
The CIELCH color space serves as a safe intermediary that preserves image integrity during processing while guaranteeing displayability upon conversion back to RGB. The patent determines the specific range of CIELCH values that will definitely convert to valid RGB values, and constrains processing operations to remain within this safe range, thus eliminating the risk of producing un-displayable pixel data while maintaining image integrity.
Data Source
AI summary
The image processing method includes following steps. Determine an image display space of an CIELCH color space corresponding to an original color space. Convert a plurality of first pixel data of the original color space to a plurality of second pixel data of the CIELCH color space. Perform an image adjustment process to the second pixel data of the CIELCH color space to obtain a plurality of third pixel data of the CIELCH color space, wherein the third pixel data is restricted within the image display space. Convert the third pixel data of the CIELCH color space to a plurality of fourth pixel data of the original color space to set an image displayed by a display apparatus.