Color Conversion Lookup Table via Lightness-Ordered Calibration
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Solution Overview
Problem
Current image display systems face challenges in achieving high accuracy and efficiency in color measurement due to the need for frequent calibration of color measurement devices, which requires a large number of images and significant time, leading to increased complexity and reduced accuracy.
Innovation Solution
An image processing apparatus that includes an image information transmission unit, a color information acquisition unit, and a conversion relationship creation unit, which transmits and acquires color information in ascending order of lightness in a predetermined color space, allowing for the creation of a multi-dimensional lookup table for color conversion, thereby reducing the need for frequent calibration and improving measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional color measurement methods are used, then color accuracy can be maintained, but frequent calibration is required which increases time consumption and operational complexity
Solution Approach 1:
The system performs preliminary color measurement of the display device during the manufacturing process and stores the measurement results in advance. This preliminary action eliminates the need for frequent calibration during operation, as the stored measurement data can be directly used for color conversion, thereby resolving the contradiction between maintaining measurement accuracy and reducing calibration time
Solution Approach 2:
The invention creates a digital copy of the display device's color characteristics by storing measurement results in a storage unit. This copy replaces the need for physical recalibration of the measurement device, allowing the system to maintain accurate color measurement without repeatedly performing time-consuming calibration procedures
2Measurement precision
If traditional color measurement methods are used, then color accuracy can be maintained, but the number of images required for calibration increases device complexity
Solution Approach 1:
The invention extracts only the essential color measurement data from the complex calibration process and stores it in a compact format in the storage unit. By taking out only the necessary measurement results rather than requiring the full calibration apparatus to be present, the system maintains measurement accuracy while significantly reducing device complexity
Solution Approach 2:
The storage unit acts as an intermediary between the display device and the color measurement process. Instead of requiring direct interaction between the measurement device and display device during calibration, the stored measurement results serve as an intermediary data source, simplifying the overall system architecture and reducing operational complexity
3Measurement precision
If multiple images are used for calibration, then measurement accuracy improves, but processing time and effort increase
Solution Approach 1:
The system performs the computationally intensive color measurement and analysis of multiple images during the manufacturing phase as a preliminary action. The results are stored and can be quickly retrieved during operation, thereby achieving high measurement accuracy without impacting the productivity during actual color conversion operations
Data Source
AI summary
An image processing apparatus includes an image information transmission unit, a color information acquisition unit, and a conversion relationship creation unit. The image information transmission unit transmits, to a display device, pieces of color-conversion image information representing images used for performing color conversion for the display device, in ascending order of lightness of the images in a predetermined color space. The color information acquisition unit acquires color information of each image that is displayed on the display device in accordance with a corresponding piece of color-conversion image information among the pieces of color-conversion image information that have been transmitted by the image information transmission unit. The conversion relationship creation unit creates, on the basis of the color information that has been acquired by the color information acquisition unit, a conversion relationship for a color of an image to be displayed on the display device.