Dynamic Inspection Parameter Adjustment for Print Position Deviation
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Solution Overview
Problem
Existing image processing systems for printed materials face errors when a sheet exceeds the maximum reading width, leading to false detection of print defects due to inadequate inspection settings for print position deviation.
Innovation Solution
An image processing apparatus with a setting unit to adjust the inspection parameters for print position deviation based on the sheet width, allowing for a narrower settable range when the sheet width exceeds the readable width, enabling accurate inspection by changing the inspection parameter settings dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the image reading device reads a sheet that exceeds the maximum reading width, then an unreadable sheet area is generated, but inspection accuracy deteriorates due to estimation errors and false defect detection
Solution Approach 1:
The inspection parameter setting range is made dynamic based on the sheet width. When the sheet width exceeds the readable width, the system automatically adjusts the settable range of inspection parameters to be smaller, adapting the inspection conditions to the actual reading capabilities and preventing false detections caused by estimation errors in unreadable areas.
Solution Approach 2:
The system changes the inspection parameters specifically for print position deviation inspection based on the sheet width condition. By modifying the settable range of inspection parameters when sheet width exceeds readable width, the system optimizes detection accuracy while accounting for the limitations of reading exceeding portions through estimation.
2Adaptability or versatility
If the inspection setting for the exceeding portion is changed, then the inspection adaptability improves, but the print position deviation inspection reliability deteriorates because the entire sheet surface inspection setting remains unchanged
Solution Approach 1:
The system applies different inspection parameter settings to different situations based on sheet width. Instead of using a uniform inspection setting for all sheets, the system provides localized optimization by adjusting the settable range of inspection parameters specifically when the sheet width exceeds the readable width, while maintaining appropriate settings for normal cases.
3Device complexity
If a fixed inspection parameter range is used for all sheet widths, then the device complexity is reduced, but the inspection precision deteriorates when sheet width exceeds readable width
Solution Approach 1:
The inspection parameter setting range is made dynamic based on the sheet width. When the sheet width exceeds the readable width, the system automatically adjusts the settable range of inspection parameters to be smaller, adapting the inspection conditions to the actual reading capabilities and preventing false detections caused by estimation errors in unreadable areas.
Data Source
AI summary
In an image processing apparatus, a condition for detecting a print position deviation on a print medium in a printed material is set. Based on the condition, data obtained by reading the print medium for the print position deviation is inspected. In the condition, in a case where a width of the print medium is larger than a readable width for reading the print medium, a settable range is small relative to a case where the width of the print medium is smaller than the readable width.