Inspection System Example
Print Inspection System for Screen-Printed Dinnerware
Automated grading of screen-printed decoration on plates, with sorting signals for each ware.
The Screen Decoration Vision Inspection System (SDVIS) is a LabVIEW vision application that automates the inspection of decorated dinnerware. It quantifies the magnitude of design and pattern defects on each plate, grades the ware as good, minor defect or major defect, and outputs signals to separate it.
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Example Overview
Vision Inspection of Screen-Printed Decoration
What is print inspection?
Print inspection checks printed and decorated surfaces for defects in pattern, color and registration. On decorated dinnerware, the hard part is grading: deciding consistently, plate after plate, whether a flaw is acceptable, a minor defect or a major one, when human inspectors drift with fatigue and judgment.
The SDVIS measures how large each design or pattern defect is and applies defect limits to grade every plate. Its interface lets the user define plate dimensions, acquisition and analysis parameters, plate colors, regions to ignore or merge, and the defect limits for each grade, without programming.
At a glance
- Product
- Screen-decorated dinnerware
- Checks
- Design and pattern defects, quantified by magnitude
- Grades
- Good, minor defect, major defect
- Output
- Signals for ware separation
- Software
- Windows-based LabVIEW vision application
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How It Works
How the Print Inspection System Works
Each plate is imaged, compared with the expected decoration and graded against configurable limits.
Dimensions, colors and regions set in the interface.
Each plate is imaged with configured acquisition settings.
Decoration is compared, ignoring or merging defined regions.
Defect magnitude sets good, minor or major.
Output signals route each ware.
What the System Does
Software Built for Consistent Grading
Grading decoration by eye varies between inspectors and shifts. The software applies the same limits to every plate.
Defect magnitude scoring
Each defect is measured, so grades follow clear limits.
Three-level grading
Good, minor defect and major defect match how ware is sold.
Ignore and merge regions
Regions can be excluded or combined to fit each design.
Setup without programming
An intuitive interface defines plates, colors and limits.
Hardware and Software
System Capabilities
The system combines image acquisition, configurable analysis and sorting outputs. See scratch detection for related surface inspection methods.
| Setup | Plate dimensions, colors, acquisition and analysis parameters |
|---|---|
| Regions | Ignore regions and merge regions |
| Limits | Defect limits per grade |
| Classification | Good, minor defect, major defect |
| Output | Signals for ware separation |
| Platform | Windows-based LabVIEW application |
Featured in the trade press
This plate quality inspection system was covered by Vision Systems Design, one of several Sciotex projects featured in the trade press:
- Defects quantified, not just pass or fail
- Grades matched to quality standards
- Setup by quality staff, not programmers
Need print or surface inspection?
Sciotex builds vision inspection systems that grade printed, decorated and finished surfaces consistently.
Additional Resources
Learn More
Inspecting Printed or Decorated Products?
Talk to a Sciotex engineer about print, decoration and surface inspection.
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