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> Why do we use barcodes? Barcode readers are cheaper.
by kaoD 6y ago
> Why do we use barcodes?
Barcode readers are cheaper.
- colejohnson66 6y agoAlso, QR codes don’t work too well with damaged or faded paper. Think receipts. 1D barcodes work much better there as there’s redundancy in the second direction. Basically, QR codes do have the advantage in the density department, but are more complicated (relatively) to parse and more susceptible to damage. Tradeoffs that depend on your situation.
- sdmike1 6y agoThis just isn't true. QR codes have a high degree of redundancy built into them via error correcting codes. For example there is the famous case of a bitcoin private key being recovered from a small amount of a qr code and a blurry shot of the full one[0]. [0] https://www.freecodecamp.org/news/lets-enhance-how-we-found-rogerkver-s-1000-wallet-obfuscated-private-key-8514e74a5433 https://www.freecodecamp.org/news/lets-enhance-how-we-found-...
- kube-system 6y agoI think the average QR code has what, 15-30% redundancy? a 100 pixel high 1d barcode is 10,000% redundant in one axis :)
- deleted 6y ago[deleted]
- pantalaimon 6y agoI found that if you damage one of the edges (with the positioning markers), most software will fail to read it.
- Serenacula 6y agoMy job involves scanning damaged codes of both types on a regular basis. QR codes are way more reliable than you'd expect, and will often scan even with partial codes, on damaged labels. Barcodes meanwhile always need a complete code to work.
- aidenn0 6y agoActually barcode readers are expensive. Barcode printers are cheap though. [Edit] I misunderstood the context as being optical scan codes vs other technologies, not 2d vs 1d