Color Display Calibration Using Mobile Camera Test Patterns
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Solution Overview
Problem
Conventional color display device calibration requires specialized equipment like colorimeters or spectrophotometers, which most individuals do not have regular access to, making it difficult to adjust color output accurately.
Innovation Solution
Utilize the camera of a mobile device, such as a smartphone or tablet, to measure color output by detecting fiducial markers in test patterns displayed on the display device, aligning the device for accurate measurement, and calculating adjustments based on captured images, effectively replacing specialized instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If specialized equipment like colorimeters or spectrophotometers is used for color calibration, then measurement precision and color accuracy are improved, but device complexity and cost increase
Solution Approach 1:
The patent uses a mobile device camera to capture images of test patterns displayed on the color display device, creating a visual copy of the color output. This copy is then processed to determine color accuracy, replacing the need for specialized color measurement instruments while maintaining calibration capability.
Solution Approach 2:
The patent replaces the mechanical/optical measurement system of colorimeters and spectrophotometers with a digital imaging system using a mobile device camera. The camera captures test patterns and processes them through image analysis algorithms to determine color characteristics, substituting physical measurement hardware with software-based digital processing.
2Measurement precision
If specialized color measurement instruments are used, then color calibration accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The patent enables the mobile device itself to perform the color measurement function through its integrated camera and processing capabilities. The device captures test patterns, processes the images to determine color accuracy, and provides calibration recommendations without requiring external specialized equipment or expert intervention.
Solution Approach 2:
The patent makes the mobile device universally applicable for color calibration by utilizing its existing camera and processing capabilities. Instead of requiring dedicated calibration hardware, any mobile device can perform color measurement and calibration tasks, greatly improving accessibility and ease of operation.
3Measurement precision
If conventional color calibration methods are used, then color accuracy is maintained, but loss of time increases due to equipment availability constraints
Solution Approach 1:
The patent creates digital copies of test patterns through mobile device camera images, which can be rapidly processed and analyzed. This digital copying approach eliminates the time-consuming requirements of specialized equipment calibration procedures, enabling quick and efficient color measurement without scheduling constraints.
Solution Approach 2:
The patent displays test patterns on the color display device before capturing images with the mobile device camera. The test patterns are prepared in advance with known color values, allowing immediate processing and comparison to determine color accuracy, thereby reducing overall calibration time.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables on-site color calibration of display devices using a mobile device, reducing the need for specialized equipment and improving color accuracy with a more accessible and efficient process.
Implementation Method 1
controlling an integrated camera of the mobile device to detect a plurality of fiducial markers that is displayed as part of a test pattern displayed on a display surface of a color display device
Implementation Method 2
controlling, in response to a position of the overlay being aligned on the display of the mobile device with the live image of the test pattern, the integrated camera to capture a two-dimensional image of the test pattern
Data Source
AI summary
A method includes controlling an integrated camera of a mobile device to detect a plurality of fiducial markers displayed as part of a test pattern on a display surface of a color display device, wherein the test pattern is one of a plurality of test patterns, estimating a position of the integrated camera relative to the display surface, using the plurality of fiducial markers, augmenting a live image of the test pattern on a display of the mobile device with an overlay, controlling, in response to a position of the overlay being aligned on the display of the mobile device with the live image of the test pattern, the integrated camera to capture an image of the test pattern, and calculating an adjustment to a color setting of the color display device, wherein the adjustment is calculated using information extracted from the image.