Monitor Color Calibration via Iterative Feedback Control
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Solution Overview
Problem
Conventional monitor calibration techniques struggle to accurately and stably reproduce colors, especially for primary coordinates, due to limitations in stability and accuracy, leading to inconsistent color conversion and output.
Innovation Solution
A method and apparatus using a color conversion module, color measurement module, and display module to store target color properties, measure and adjust image properties, and generate image control signals for stable color conversion, involving a system with a storage module, color measurement module, and color conversion module to control color properties based on target and measured values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional calibration techniques using light or color meter are used, then white and gamma calibration can be performed, but color coordinate calibration accuracy is insufficient
Solution Approach 1:
The system measures the actual color output using a color meter and compares it with target values, then uses this feedback to iteratively adjust conversion parameters until the measured colors match the target colors within a predetermined accuracy threshold
Solution Approach 2:
The calibration process repeatedly measures multiple colors and adjusts conversion parameters through multiple iterations, performing periodic measurements and adjustments to gradually achieve target color accuracy
2Ease of manufacture
If numerical formulas are used for color emulation, then color calibration can be performed, but stability and accuracy are limited
Solution Approach 1:
The system introduces a color meter as an intermediary device to objectively measure actual color output, bridging the gap between theoretical color values and actual display output, enabling accurate measurement-based parameter adjustment
Solution Approach 2:
The system dynamically changes conversion parameters based on measured color values, adjusting the color conversion matrix and other parameters iteratively to achieve target color accuracy rather than relying on fixed numerical formulas
3Productivity
If several colors are measured to set parameters, then color conversion can be performed, but accuracy of color conversion for input target values cannot be ensured
Solution Approach 1:
The system pre-measures multiple standard colors to establish the relationship between input and output colors, creating a comprehensive color conversion model that can accurately handle various input target values without requiring extensive real-time calibration
Data Source
AI summary
A method and an apparatus for calibrating a color property of a monitor used in a system including a color conversion module, a color measurement module and a display module. The method includes storing a target color property and measuring a color property of an image displayed on the display module using the color measurement module and generating an image control signal so as to control the color property of the image displayed on the display module based on the target color property and the measured color property of the image. The image control signal is adaptable to a color conversion scheme of the color conversion module.