We're planning inspecting reflective surfaces for scratches, with Fairino FR10 presenting a bright-finished enclosure faceplate to a fixed camera in a cosmetic components workshop.
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?
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.
@FelixAdams0110 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.
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.
@FelixAdams0110 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.
You're right to qualify that. The streak behaviour motivates an imaging investigation; it doesn't replace physical classification under the agreed inspection procedure.
Retain their sample identities and undecided status. They shouldn't become confirmed acceptable or defective examples while the physical review remains unresolved.
Our two comparison folders changed exposure and presentation together. I can't tell which change made the images look better. That comparison needs a caveat too.
@BethChan1107 I had a separate inspection setup where the 'better lighting' folder used easier samples too. Its name implied a lighting conclusion that the comparison didn't support.
On my setup we kept sample ID, exposure, lighting arrangement and presentation condition. Enough to explain a comparison without reconstructing the whole session from memory.
I've settled the review method: physical reference checks plus controlled image comparisons. That answers where to start; whether our inspection concept is suitable still depends on the resulting evaluation.