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I want to develop a supermarket application for checking and billing.
Should I use barcodes or qrcodes? Which will give better accuracy?
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QR codes are also more secure than one-dimensional barcodes as the information can be encrypted. There's also less room for error, as they have three levels of error detection built into the code; if something is off, you'll know.
Barcode accuracy: Studies indicate that even the best-trained data entry operator will make an error approximately every 300 key strokes. In comparison, even the simplest barcode has an error rate of not more than 1 error in 394,000 scans.
Two-dimensional QR CodesThey use a square shape and have a much more complex structure than a Barcode. This structure is what makes them extremely error-tolerant, improves their information capacity by a large margin, and makes scanning faster and easier.
The biggest difference here is that a linear barcode (e.g. Code 3 of 9, UPC, EAN, etc.) and a 2-dimensional symbology (e.g. QRCode, DataMatrix, etc.) store data in very different ways. A linear barcode can be read with a simple laser scanner, while most 2-D symbologies require an imager in order to be read. In general, imagers can also read linear barcodes, but are also more expensive than laser scanners.
You will want to consider whether your customers may already have linear scanners only, or whether they would be willing to pay the premium for an imager in order to get the benefit of the extra data that can be encoded in the 2-D symbologies.
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