Print Correction Value Control for Mobile Test Pattern Capture
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Solution Overview
Problem
When using a mobile device with a camera to capture a test pattern for adjusting printing characteristics, variations in angle and distance can result in an impossible correction value, leading to incorrect adjustments or inability to adjust printing characteristics due to errors.
Innovation Solution
A printing system that includes a separate imaging section from the printing device to capture a test pattern, with a control section determining a provisional correction value within an acceptable range, and an alternative value if the provisional value is outside this range, ensuring the correction value is always within the acceptable bounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a mobile device with a camera is used to capture the test pattern instead of a scanner, then the convenience of adjusting print characteristics is improved, but the angle and distance between the test pattern and the camera become variable, leading to impossible correction values
Solution Approach 1:
The system dynamically adjusts the correction value determination based on the captured image quality and characteristics. Instead of requiring fixed camera positioning, the system adapts to varying angles and distances by processing the captured image to extract meaningful correction data, transforming a static requirement into a dynamic solution.
Solution Approach 2:
The system changes the approach from measuring physical parameters (fixed angle and distance) to analyzing image data parameters. By processing the captured image to determine correction values based on pattern recognition and image analysis rather than geometric constraints, the system accommodates variable camera positions while maintaining measurement accuracy.
2Productivity
If the correction value is determined strictly based on the captured image without validation, then the processing speed is improved, but incorrect correction values lead to inappropriate adjustment of printing characteristics
Solution Approach 1:
The system implements feedback validation by checking whether the determined correction value falls within the acceptable range. If the correction value is outside the valid range, the system identifies this as an abnormal termination and requests re-capture, ensuring that only valid correction values are applied while maintaining efficient processing for normal cases.
Solution Approach 2:
The system performs partial validation by checking only the essential condition (whether correction value is within acceptable range) rather than comprehensive verification. This selective approach maintains processing speed while ensuring sufficient reliability for practical use.
3Reliability
If an error is notified when the correction value is outside the acceptable range, then the reliability is improved by avoiding incorrect adjustments, but the user must repeat the capture process, reducing productivity
Solution Approach 1:
The system performs preliminary validation of the correction value before final application. By checking whether the correction value falls within the acceptable range before committing to the adjustment, the system prevents incorrect adjustments while providing clear guidance to users for re-capture when necessary, balancing reliability with user efficiency.
Data Source
AI summary
A printing system includes a printing device that prints a test pattern for determining a correction value used for adjusting a printing characteristic on a medium; an imaging section that is separate from the printing device and generates a captured image of the test pattern by capturing the test pattern; and a control section that acquires the captured image from the imaging section and performs processing of determining the correction value, wherein the control section determines a provisional value as the correction value when a provisional value is included in a predetermined acceptable range, the provisional value being obtained from the test pattern included in the captured image and determines an alternative correction value that is inside the boundary of the acceptable range as the correction value when the provisional value is outside the acceptable range.