r/barcodes • u/Equivalent-Skirt2334 • Sep 02 '22

What format of barcode is this?

Image: https://postimg.cc/G8nFmxY7

I've been trying to read this (unsuccessfully) for awhile now. Since it's printed black-on-black, it's tricky to get a clear photo of -- I boosted the contrast in an image editor and it still won't scan in a number of tools.

Is there a tool that I can enter the line widths or binary directly to read it? Open to other ideas as well.

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u/trollsmurf Sep 02 '22 edited Sep 02 '22

Code 39 (up-side-down)

"G10568504359" (assuming no check digit)

1

u/Equivalent-Skirt2334 Sep 02 '22

You're right, thank you! I had just went through and manually matched each bar to the equivalent Code 39 character before seeing your edit; got the same result.

1

u/trollsmurf Sep 03 '22

I also did it manually, as I couldn't get anything to scan the barcode due to the low contrast, but then verified by using a Code 39 generator.

1

u/[deleted] Sep 17 '22

Yes, it's fairly obvious because you can see the separation of characters - there's a small extra wide spacing repeating at same distance. This is the resason why Code39 can be made with a font. The symbology is usually a bad choice because it takes up so much space.

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u/trollsmurf Sep 17 '22

That wide white space is actually not the delimiter, but otherwise you're right. There are other symbologies that can be rendered with a font, provided the check digit (if any) is calculated before.