4 ms·

Can someone explain to me what the advantages of QR codes are over bar codes or other similar methods?

• cmrx64 9y ago
  1. Denser (ie, more information per unit area) 2. More redundant (ie, more surface area can be destroyed and still be able to recover the original message)
• andrewla 9y ago
  The confusing thing about this question is that "other similar methods" includes QR codes [1] -- they're just a generalization of 1-dimensional bar codes to a 2-dimensional matrix, with some error correction and alignment information to make scanning them theoretically more reliable. They also have native support for some data types, like URLs. Other than that, it's mostly that they have some traction. [1] https://en.wikipedia.org/wiki/Barcode#Matrix_.282D.29_barcodes https://en.wikipedia.org/wiki/Barcode#Matrix_.282D.29_barcod...
• taeric 9y ago
  I'm assuming the largest advantage is just the amount of data they can hold. One of the top google results[1] indicates that 1d bar codes can hold ~100 characters, while 2d ones can hold ~2000 characters. There is also a bit of artistic freedom you can do with the 2d ones. They really aren't as ugly as the 1d ones. Especially if you use them to "frame" something. Note, still not pretty, per se. Just not as ugly. [1] http://support.idautomation.com/Barcode-Learning/How-much-data-can-a-barcode-hold/_2148 http://support.idautomation.com/Barcode-Learning/How-much-da...
  • dilap 9y ago
    I always thought bar codes and QR codes both looked kind of pretty, in a glitch-art way.
  • j_s 9y ago
    Animated GIF qr code https://github.com/sylnsfar/qrcode https://github.com/sylnsfar/qrcode
• devopsproject 9y ago
  * data density (up to 100 times more than barcodes) * built in error correction (partially marred qr codes can still be used) * skinable\customizable (embed your logo, change colors, etc ) * 360 degree scanning capability Barcodes still have their place but the QR code does have some unique properties
• pmlnr 9y ago
  It can store various data formats, eg. vcard. You scan it and save every phone number, email, etc immediately. Or WiFi credetials, including both the network and the password: scan, tick, connected.
• dheera 9y ago
  The amount of information they can hold is especially important in the case of bank transactions. Alipay and Wechat Pay (in China) have QR codes that change every minute. The merchant transaction has to be performed with the current QR code. It's basically a poor man's substitute for the encrypted handshake provided by contactless payment protocols. If someone got your payment QR code they could only abuse it for 1 minute. I do dislike the use of QR codes for static data, such as a username on business cards and posters. From a design standpoint it looks horrible and busy. I wish those apps had the ability to recognize a logo instead. Or even just a UI to scan and OCR a text username on a business card.
• nayuki 9y ago
  QR codes are much more information-dense than 1D barcodes. Try encoding a string like "The quick brown fox jumps over the lazy dog" (43 ASCII characters) using these tools and seeing how much space they take up: * https://www.nayuki.io/page/1d-barcode-generator-javascript https://www.nayuki.io/page/1d-barcode-generator-javascript * https://www.nayuki.io/page/qr-code-generator-library https://www.nayuki.io/page/qr-code-generator-library