Dynamic Inspection Level Adjustment for Printed Sheet Defect Detection
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Solution Overview
Problem
Conventional inspection systems face challenges in configuring optimal inspection levels for image quality on printed sheets, leading to either excessive detection of non-defective sheets or missed defects, as users struggle to determine the appropriate inspection level configuration.
Innovation Solution
An inspection system that includes a reading unit for generating read image data, an inspection unit for comparing data at multiple candidate inspection levels, and a control unit for displaying inspection results, allowing users to adjust the inspection level based on first and second inspection results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the inspection level is configured to be too high, then the detection precision of defects is improved, but the number of sheets determined to be defective despite being within a permissible range increases
Solution Approach 1:
The inspection level is made dynamically adjustable through a user interface that allows operators to select from multiple candidate inspection levels. The system provides real-time feedback showing how different inspection levels affect defect detection results, enabling dynamic optimization between detection precision and productivity based on actual production needs.
Solution Approach 2:
The system changes the inspection parameter (inspection level) from a fixed value to a selectable range of values. By providing multiple candidate inspection levels and allowing users to switch between them, the system enables parameter optimization to balance defect detection precision with productivity, reducing false positives while maintaining acceptable detection capability.
2Productivity
If the inspection level is configured to be too low, then the productivity is improved, but defects which should be detected will be more likely to be missed
Solution Approach 1:
The inspection level is made dynamically adjustable through a user interface that allows operators to select from multiple candidate inspection levels. The system provides real-time feedback showing how different inspection levels affect defect detection results, enabling dynamic optimization between detection precision and productivity based on actual production needs.
Solution Approach 2:
The system changes the inspection parameter (inspection level) from a fixed value to a selectable range of values. By providing multiple candidate inspection levels and allowing users to switch between them, the system enables parameter optimization to balance defect detection precision with productivity, reducing false positives while maintaining acceptable detection capability.
3Ease of operation
If multiple inspection levels are provided with detailed comparison results, then the ease of operation for configuring inspection levels is improved, but the device complexity increases
Solution Approach 1:
The system creates simplified visual copies of inspection results at different inspection levels, allowing users to compare outcomes without dealing with complex underlying parameters. By displaying visual representations of how different inspection levels affect defect detection, the system makes configuration easier while managing complexity through intuitive visualization rather than exposing complex system internals.
Solution Approach 2:
The user interface acts as an intermediary between the user and the complex inspection level configuration. It translates complex inspection parameters into simple visual comparisons showing defect detection results at different levels, enabling ease of operation while hiding the underlying system complexity from the user.
Data Source
AI summary
An inspection system includes a reading unit that reads a sheet on which a target image is formed to generate read image data, an inspection unit that inspects the target image by comparing the read image data with a reference image data at an inspection level configured from among candidate levels to generate a first inspection result, and a control unit that causes a display apparatus to display an inspection result. In a case where the first inspection result meets a predetermined condition, the control unit causes the display apparatus to display the first inspection result and to display a second inspection result. The second inspection result is obtained by inspecting the target image at one or more candidate levels that are different from the inspection level.