OCR reads visible characters, OCV compares them with expected text, and code reading supports board and lot traceability. Missing, blurred, shifted and low-contrast markings must be evaluated with actual fonts, illumination and resolution.
How to validate
Define character sets, fonts, blur limits, symbologies and minimum sizes. Track unreadable codes, misreads and mismatches separately. Verify MES fields, duplicate handling and recovery after an interrupted connection.
Project evaluation checklist
- Define the item, visible inspection surfaces and minimum defects; separate appearance, internal structure and electrical or functional checks.
- Prepare verified good, defective and borderline samples across lots; separate training and acceptance sets.
- Report escapes and false calls by defect class, with review workload, complete cycle time and repeatability.
- Confirm program versions, permissions, retention and traceability fields; approve production only after trials pass.
Continue with
2D AOI machines
Visible appearance, components and markings.
→3D AOI machines
Visible surface height and coplanarity.
→AOI software
Programming, review, model management and traceability.
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