Printed Material Inspection With Level-Coded Region Frames
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Solution Overview
Problem
Conventional inspection methods struggle to distinguish between multiple inspection regions with different levels, leading to difficulties in setting appropriate inspection levels and resulting in either discarded non-defective or defective printed materials.
Innovation Solution
An inspection apparatus and method that displays inspection regions with frame lines of varying thicknesses or forms based on their respective inspection levels, allowing easy identification of the applied inspection level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple inspection regions with different inspection levels are arranged, then inspection flexibility and adaptability are improved, but the ability to distinguish between inspection levels becomes difficult
Solution Approach 1:
The patent applies color changes by using different colors for frame lines corresponding to different inspection levels. This allows users to visually distinguish between multiple inspection levels through color coding, resolving the difficulty of identifying inspection levels when multiple regions are arranged.
Solution Approach 2:
The patent applies asymmetry by using frame lines with different characteristics (such as different colors, thicknesses, or styles) for different inspection levels. This asymmetric representation makes it easy to differentiate between inspection levels at a glance, improving both adaptability and detectability.
2Reliability
If inspection levels are set too strict, then defect detection capability is improved, but the number of discarded non-defective materials increases
Solution Approach 1:
The patent applies local quality by allowing different inspection levels to be set for different inspection regions within the same printed material. This enables strict inspection for critical areas and lenient inspection for less critical areas, improving defect detection accuracy where needed while reducing unnecessary discards in other areas.
Solution Approach 2:
The patent applies segmentation by dividing the printed material into multiple inspection regions, each with its own inspection level. This segmentation allows customized inspection strategies for different parts of the material, balancing defect detection reliability with material utilization efficiency.
3Productivity
If inspection levels are set too lenient, then material acceptance increases, but defective materials may be shipped
Solution Approach 1:
The patent applies local quality by implementing different inspection levels for different regions, allowing lenient inspection for non-critical areas to maintain high material acceptance rates while maintaining strict inspection for critical areas to ensure defect detection capability.
Solution Approach 2:
The patent applies segmentation by dividing the inspection into multiple regions with different stringency levels, enabling the system to accept more materials overall while still detecting defects in critical areas through stricter inspection protocols.
Data Source
AI summary
An inspection apparatus obtains a scanned image obtained by reading a printed material with an image reading unit, inspects the printed material based on the scanned image and a reference image, and sets an inspection region to be a target of the inspection and an inspection level for the inspection region. The inspection apparatus displays a first inspection region, for which a first inspection level has been set in the setting, so as to be surrounded by a frame line of a first thickness, and displays a second inspection region, for which a second inspection level different from the first inspection level has been set in the setting, so as to be surrounded by a frame line of a thickness different from the first thickness.