A fixed camera, small presentation changes, very different streaks (Universal Robots UR5e)

RosaChen1162 · 17 Jul 2026, 03:14 UTC

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RO
RosaChen1162
We're planning checking cosmetic metal surfaces with a fixed camera, with Universal Robots UR5e presenting a bright-finished enclosure faceplate to a fixed camera in a precision metal-parts inspection area. Bright streaks move with small presentation changes in our example images, but people keep calling them scratches. We haven't commissioned the cell. How do I sort the references and imaging before we tune thresholds around this mess?

5 replies

RA
RaviChan1085
Replying to RosaChen1162

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.

4 points
RO
RosaChen1162
Replying to RaviChan1085

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.

17 points
RA
RaviChan1085
Replying to RosaChen1162

@RosaChen1162 Mark those labels uncertain and have the samples inspected properly. Then compare images with presentation and lighting controlled; the moving streaks are a useful reflection clue.

12 points
RO
RosaChen1162
Replying to RaviChan1085

The reference problem is clearer, but I still can't judge inspection performance from our example images. The physical labels and image comparisons need more work.

9 points
RA
RaviChan1085
Replying to RosaChen1162

@RosaChen1162 That follows from the reference gap. Explaining it more clearly helps, but the images still can't carry a performance claim.

7 points

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