Color Gamut Mapping Register Auto-Tuning via Chromaticity Feedback
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Solution Overview
Problem
Conventional color gamut mapping devices require manual and time-consuming tuning processes to set and adjust parameters, leading to prolonged tuning times.
Innovation Solution
An automated tuning method and apparatus that uses a test device to set initial parameters, measure chromaticity for color images displayed on a panel, and automatically adjust saturation and hue parameters based on differences between measured and reference UV values, updating the device's registers until a specified error threshold is met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual tuning is used to adjust color gamut mapping parameters, then the operator can directly control parameter changes, but the tuning process takes a long time
Solution Approach 1:
The system performs self-tuning by automatically adjusting saturation and hue parameters based on measured color values. The color gamut mapping device measures its own output colors and autonomously modifies register parameters without requiring continuous manual intervention, thereby reducing tuning time while maintaining operational control.
Solution Approach 2:
The system implements a feedback mechanism where measured chromaticity values from the display are compared against reference values, and the differences are used to automatically adjust parameters. This closed-loop feedback enables the system to self-correct color deviations and complete tuning faster than manual methods.
2Loss of time
If automatic parameter adjustment is implemented, then tuning time is reduced, but the complexity of the tuning system increases
Solution Approach 1:
The test device serves multiple functions: it generates test color images, measures displayed colors, calculates parameter adjustments, and communicates with the color gamut mapping device. By consolidating these functions into a single multi-functional system, the patent reduces overall system complexity while enabling automatic tuning.
Solution Approach 2:
The patent introduces a parameter calculation module as an intermediary that translates measured color deviations into specific register parameter adjustments. This intermediary layer simplifies the control logic by providing a systematic method to convert measurement data into actionable parameter changes, reducing the complexity of direct control.
3Manufacturing precision
If multiple saturation and hue parameters are adjusted manually, then precise color control is achieved, but the tuning process becomes time-consuming
Solution Approach 1:
The system automatically modifies saturation and hue parameters in register based on measured color deviations. By systematically changing these parameters according to calculated differences between measured and reference values, the system achieves precise color control while eliminating the time-consuming nature of manual parameter adjustment.
Solution Approach 2:
The patent divides the color gamut adjustment into separate saturation control and hue control components, each with dedicated parameters. This segmentation allows the system to independently optimize saturation and hue aspects, achieving comprehensive color precision through coordinated adjustment of multiple specialized parameters rather than a single complex control mechanism.
Data Source
AI summary
The present disclosure relates to a tuning method and apparatus for a color gamut mapping device, in which a tuning time is shortened by automatically setting and changing parameters of a register when tuning the color gamut mapping device. A tuning method of a color gamut mapping device according to an aspect includes an initial setting operation of setting, by a test device, initial parameters in a register of a color gamut mapping device, a measuring operation of measuring, by a measuring device, chromaticity for each of a plurality of color images which are supplied from the test device and displayed on a panel of a display device through the color gamut mapping device, an automatic tuning operation of changing, by the test device, saturation parameters and hue parameters of a plurality of hue axes of the color gamut mapping device by using a result measured from the measuring device.