Our example images keep turning shiny patches into defects (presenting reflective components for surface inspection)

AnikaAli0247 · 14 Jul 2026, 03:42 UTC

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AN
AnikaAli0247
Our planned presenting reflective components for surface inspection in a small finished-parts production cell has Universal Robots UR5e presenting a bright-finished enclosure faceplate to a fixed camera. The example images contain bright streaks that shift with small presentation differences, yet those streaks are being labelled as scratches. Before commissioning, I'd like to establish reliable references and image conditions for threshold tuning.

10 replies

NA
NaomiBaker0506
Replying to AnikaAli0247

Were those scratches confirmed on the physical samples using your agreed appearance method? Start by linking each image to a sample and its inspection result.

7 points
AN
AnikaAli0247
Replying to NaomiBaker0506

Some labels came from the pictures alone. We still have the samples, but those labels aren't tied to physical inspection results. That's irritatingly circular.

19 points
NA
NaomiBaker0506
Replying to AnikaAli0247

Keep the image-only labels uncertain pending physical inspection. A controlled comparison of lighting and presentation can then investigate whether the moving streaks indicate reflection effects.

3 points
IS
IsaacBennett0781
Replying to NaomiBaker0506

That clue needs a limit: presentation can also change how a real scratch appears. Movement in the image isn't enough to reclassify the sample as acceptable.

-8 points
NA
NaomiBaker0506
Replying to IsaacBennett0781

Correct. I meant a reason to investigate the imaging, not a new defect label. Physical acceptance stays with the agreed inspection method.

16 points
WI
WillAli0226
Replying to NaomiBaker0506

@NaomiBaker0506 So uncertain isn't the same as good? Where do those images go?

23 points
NA
NaomiBaker0506
Replying to WillAli0226

Retain their sample identities and undecided status. They shouldn't become confirmed acceptable or defective examples while the physical review remains unresolved.

2 points
AN
AnikaAli0247
Replying to NaomiBaker0506

I've checked the image folders and found that exposure and presentation both changed between them. Their improved appearance can't be attributed to either change individually.

12 points
AN
AnikaAli0247
Replying to AnikaAli0247

The inspection concept remains undecided because the available references and images don't establish reliable discrimination of the required defects.

14 points
NA
NaomiBaker0506
Replying to AnikaAli0247

@AnikaAli0247 Understood. The available references and images haven't established the discrimination your decision needs.

4 points

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