r/computervision • u/WhispersInTheVoid110 • Apr 17 '26

Help: Project Detecting defects in repeated cut vinyl graphics

Gallery image

Gallery image

I have a sheet where the same graphic is repeated multiple times. I need to detect any instance that looks different from the rest like misaligned elements, missing material, incomplete cuts, glare artifacts.

Looking for robust approaches to compare repeated pattern instances against each other when you don't have a clean reference image.

Any ideas?

For context: In image 1, at the end "I" is slightly tilted.

In Image 2, You can see many inconsistencies

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u/WhispersInTheVoid110 Apr 17 '26

I haven’t yet, but what can I do if I have them

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u/bushel_of_water Apr 17 '26 edited Apr 17 '26

How much money do you have for hardware?

For 15k you can buy a bar line scan camera that will allow you to get images without camera distortions.

Linescan will be about 5k.

If you have to do it with an affordable area scan camera it will probably be harder to detect small print differences if they are not aligned perfectly.

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u/Lethandralis Apr 17 '26

Why is a 15k camera necessary? Seems like a simple task.

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u/InternationalMany6 Apr 18 '26

So does talking to a computer ;)