Current condition
Retain the sample identity, expected decision and current optical arrangement with each trial result. State the film region, inspected width, tension and speed represented by that observation.
Industrial machine vision
Film Defect Inspection Challenge-test checklist
Agree film-inspection challenge evidence with identified good, bad and marginal samples, representative tension and speed, false-accept/reject records and defect-position handling.
Agree the expected decision for each identified film sample before the challenge trial. Include acceptable variation, the smallest unacceptable holes or marks, marginal examples and clear, printed and reflective regions. Test the full required web width at representative tension and speed, retaining the optical setup and recorded result.
Use the visible acceptance-boundary definition with the film trial specification. Record false accepts and false rejects separately, and check how defect position and affected material are identified; one successful demonstration does not establish the full range.
On the production floor
Turn your production information into clearer decisions — Film Defect Inspection
Plan film defect inspection around representative good, bad and marginal samples, line presentation, lighting, reject handling and challenge criteria. Discuss an optical feasibility trial with Oxford Vision Systems. Use this guide to resolve false-accept, false-reject and challenge criteria before it limits the final system.
Discuss your application
What to record
False-Accept, False-Reject and Challenge Criteria: condition, range and effect on your process
Realistic range
Include identified good, bad and marginal film, smallest unacceptable defects and acceptable variation across clear, printed and reflective regions. Use the agreed running conditions and repetitions for the intended range.
Effect on the system
Record false accepts, false rejects and unresolved results separately. Review recipe and control responsibilities, the intended material-handling response and how the defect position and affected material remain identified.
Before you contact us
Five questions about false-accept, false-reject and challenge criteria for your application
- Who can confirm this information?Identify who owns the visible defect definitions, acceptable variation, sample decisions and production conditions. Agree who reviews unresolved marginal cases and the affected-material record.
- How representative is the sample?Include identified good, bad and marginal film, smallest unacceptable examples and clear, printed and reflective regions across the full required width.
- What is the difficult condition?Use the marginal defect and film region that challenge visibility at the stated tension and speed. Keep the actual sample, presentation and expected decision identified.
- How will you judge the result?Compare expected and recorded decisions using agreed repetitions and running conditions. Record false accepts and false rejects separately, including unresolved cases and the defect-position record.
- What else must be coordinated?Agree the recipe and line-control responsibilities, intended response and identification of affected material. Keep hidden, functional or other tests outside the visible-inspection conclusion.
Connected details
Review false-accept, false-reject and challenge criteria as part of the complete system
Visible Defect or Measurement Definition for Film Holes, Marks & Visible Defects
Use the agreed hole, mark and visible-defect definitions and acceptance boundary. Keep the expected decision with each sample, including the smallest unacceptable examples and any separate-test exclusions.
Good, Bad and Marginal Sample Range
Retain identified good, bad and marginal samples covering clear, printed and reflective regions. Record which samples and variants were actually challenged rather than generalising from the easiest case.
Part Presentation and Production Speed
Run the agreed challenge across the full required width at representative tension and speed. Keep running conditions with results and identify any part of the intended range that remains unproved.
Optics, Lighting and Environmental Conditions
Identify the proposed lighting and camera arrangement used for the challenge. Retain observed contrast and presentation conditions with the decisions so a changed setup can be distinguished from the accepted trial.
Recipe, Reject and Line-Control Interfaces
Check the agreed recipe, reject and line-control handover alongside the visible decision. Retain how defect position and affected material were recorded, without assuming a particular disposal mechanism.
False-Accept, False-Reject and Challenge Criteria
Compare expected and recorded decisions over the agreed repetitions. Separate false accepts and false rejects, retain unresolved cases and agree the follow-up before widening the accepted scope.