Portable Display Color Correction Using Printed Chart Imaging
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Solution Overview
Problem
In telemedicine and other fields, accurate color reproduction is crucial but is hindered by the need for calibration equipment and software, making it burdensome for users, especially with mobile terminals, leading to incorrect diagnoses and increased social costs.
Innovation Solution
A method for color-correction of portable communication terminals using a printed color chart, where imaging data from the chart is used to adjust the display unit's color, eliminating the need for calibration equipment by displaying a prescribed image and acquiring imaging data to match the chart's colors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If calibration equipment and software are used to achieve accurate color reproduction, then color reproduction accuracy is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The patent uses a color chart with standardized color patches that visually represents the reference color space. Instead of using physical calibration equipment, the system creates a visual copy of the color standard that can be photographed and processed digitally to derive calibration parameters, thereby eliminating the need for complex calibration hardware while maintaining color accuracy.
Solution Approach 2:
The patent replaces the mechanical/optical calibration process with a digital image processing approach. By photographing the color chart and using image processing algorithms to extract color information, the system substitutes physical calibration equipment with software-based color correction, significantly reducing device complexity and ease of operation requirements.
2Measurement precision
If calibration equipment and software are installed to achieve accurate color reproduction, then color reproduction accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The system enables the mobile terminal to perform self-calibration by automatically photographing the color chart, processing the image data to determine color correction parameters, and applying the corrections without requiring external calibration equipment or complex user intervention. This self-service approach dramatically improves ease of operation while maintaining color reproduction accuracy.
Solution Approach 2:
The patent changes the operational parameters from physical calibration procedures to digital image processing. By using photographable color charts and automated image analysis, the system transforms the calibration process into a simple digital operation that can be performed with a standard camera, significantly reducing the user burden while achieving accurate color reproduction.
3Measurement precision
If calibration equipment is used for color-correction, then color reproduction accuracy is improved, but loss of time increases
Solution Approach 1:
The color chart is pre-prepared with standardized color patches that represent the reference color space. This preliminary preparation of the color standard allows for rapid calibration by simply photographing the pre-configured chart, eliminating the time-consuming process of physical calibration equipment setup and operation while maintaining color reproduction accuracy.
Data Source
AI summary
A display unit color-correction method includes: a first step of displaying a prescribed image on a display unit of a portable communication terminal that includes an imaging unit and the display unit; a second step of acquiring imaging data by imaging a color chart, which is a printed matter, and the display unit with the prescribed image displayed thereon together or individually by the imaging unit; and a third step of correcting a color of the display unit by using color information on the prescribed image in the imaging data and color information on a color in the color chart in the imaging data.