Image Inspection System Edge Exclusion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image inspection systems fail to accurately inspect images due to misdirection in sheet edge portions, leading to false detection of image defects.
Innovation Solution
An image inspection system that sets the edge portion of the sheet as an excluded area from inspection targets, using a hardware processor to exclude these areas during the inspection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the image inspection system inspects the entire sheet including edge portions, then the inspection coverage is maximized, but false detection occurs due to misdirection in sheet edge portions
Solution Approach 1:
The patent extracts the problematic edge portions from the inspection area by defining them as excluded areas. The inspection processing unit selectively excludes predetermined edge portions of the sheet from image inspection, removing the source of false detection (misdirection in edge portions) while maintaining inspection of the reliable central areas.
Solution Approach 2:
The patent applies different inspection quality requirements to different regions of the sheet. Edge portions are excluded from inspection due to their prone-to-misdirection nature, while central portions undergo full inspection. This local differentiation optimizes overall inspection reliability by focusing resources on areas where inspection is meaningful.
2Measurement precision
If fine images such as dots are included in inspection targets, then inspection completeness is improved, but accurate judgement becomes difficult due to inspection limitations
Solution Approach 1:
The patent extracts fine images (dots and lines) from the inspection target set. The inspection processing unit is configured to exclude these specific image types from inspection, recognizing that accurate judgement of such fine details is beyond the system's capability and would lead to unreliable results.
Solution Approach 2:
The patent applies different inspection strategies to different image types. While most images are inspected with standard criteria, fine images such as dots and lines are excluded from inspection or subjected to different, more lenient criteria. This local quality differentiation prevents false detections arising from the system's inability to accurately judge fine details.
Data Source
AI summary
An image inspection system including: an image forming apparatus that forms an image on a sheet; an image reading apparatus that reads the image formed on the sheet through the image forming apparatus; and an image inspector that inspects the image read by the image reading apparatus. The image inspector includes a hardware processor that sets an edge portion of the sheet as an image inspection excluded area that is excluded from targets for inspection of the image.