Linear Matrix Operation Unit for Color Reproducibility
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Solution Overview
Problem
Existing image processing apparatuses face challenges in ensuring color reproducibility during linear matrix operations, as they often result in non-existent colors or malfunction when attempting to correct RGB signals, particularly due to negative luminance values.
Innovation Solution
An image processing apparatus with a linear matrix operation unit that sets matrix coefficients based on input image signals, performing operations to bring RGB signals closer to ideal RGB characteristics while preventing malfunctions by using identity matrices when necessary to avoid negative luminance values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a linear matrix operation is performed to correct RGB signals to ideal RGB characteristics, then color reproducibility is improved, but malfunction occurs due to negative luminance values
Solution Approach 1:
The patent changes the parameter of matrix coefficients based on the input image signal characteristics. By determining whether to use a first matrix coefficient (for normal operation) or a second matrix coefficient (for preventing negative luminance), the system adapts the correction parameters dynamically to avoid malfunction while maintaining color accuracy where possible.
Solution Approach 2:
The patent introduces dynamic selection of matrix coefficients based on real-time analysis of the input image signal. The system transitions between different correction modes (first matrix for color accuracy, second matrix for safety) depending on the specific signal characteristics, making the correction process adaptive rather than static.
2Measurement precision
If matrix coefficients are adjusted to bring certain colors closer to ideal RGB, then color accuracy for specific colors is improved, but other colors may become non-existent
Solution Approach 1:
The patent applies different matrix coefficients to different regions of the color space. By analyzing the input signal and determining which matrix coefficient to use, the system applies localized correction strategies - using aggressive correction where safe and conservative correction where risk of negative luminance exists - thus optimizing color accuracy locally without compromising global color space validity.
Data Source
AI summary
An image processing apparatus includes a linear matrix operation unit configured to set a matrix coefficient in accordance with an input image signal, and perform a linear matrix operation on the image signal using the set matrix coefficient.