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How QR codes work (youtu.be)

submitted 1 month ago by UraniumBlazer@lemm.ee to c/technology@lemmy.world

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[–] catloaf@lemm.ee 3 points 1 month ago (1 children)

If he didn't, one of the several other 2D barcodes would have caught on. I see non-QR ones around pretty often, though usually in industrial applications.

I remember back around 2009, there were a few of these in the newspaper: https://en.wikipedia.org/wiki/High_Capacity_Color_Barcode

I don't know how well it worked given the loose color registration. I didn't have anything that could read them at the time.

[–] echodot@feddit.uk 1 points 1 month ago

Are you sure they weren't just test colors? Most newspapers have them.

I cannot imagine what information they needed to encode that required that level of information density.