QR code: Difference between revisions

Revision as of 11:52, 15 December 2011

Revision as of 11:55, 15 December 2011

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The technology has seen frequent use in [[Japan]]; the [[United Kingdom]] is the seventh-largest consumer of QR codes in the world.<ref name=Why isn't everyone using QR codes?>{{cite web|last=Williams |first=Oliver |url=http://www.imediaconnection.com/content/28604.asp |title=Why isn't everyone using QR codes? |publisher=iMediaConnection.com |date=2011-03-08 |accessdate=2011-08-17}}</ref>

== Standards ==

This is QR Code >:(

[[File:QR Code Structure Example 2.svg|thumb|Structure of a QR code, highlighting functional elements]]

There are several standards in documents covering the physical encoding of QR codes:<ref name="qrstandard1">{{cite web |url=http://www.denso-wave.com/qrcode/qrstandard-e.html |title=QR Code Standardization |publisher=Denso-wave.com |work=QR Code.com |accessdate=23 April 2009}}</ref>

*October 1997{{ndash}} AIM (Association for Automatic Identification and Mobility) International<ref>{{cite web |url=https://www.aimglobal.org/estore/ProductDetails.aspx?ProductID=31 |title=AIM Global Online Store |publisher=Aimglobal.org |accessdate=23 April 2009}}</ref>

*January 1999{{ndash}} [[Japanese Industrial Standards|JIS]] X 0510

*June 2000{{ndash}} [[International Organization for Standardization|ISO]]/IEC 18004:2000 ''[http://www.iso.org/iso/iso_catalogue/catalogue_ics/catalogue_detail_ics.htm?csnumber=30789 Information technology{{ndash}} Automatic identification and data capture techniques{{ndash}} Bar code symbology{{ndash}} QR code]'' (now withdrawn)<br /> Defines QR code models 1 and 2 symbols.

*September 1, 2006{{ndash}} ISO/IEC 18004:2006 ''[http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=43655 Information technology{{ndash}} Automatic identification and data capture techniques{{ndash}} QR code 2005 bar code symbology specification]''<br /> Defines QR code 2005 symbols, an extension of QR code model 2. Does not specify how to read QR code model 1 symbols, or require this for compliance.

At the application layer, there is some variation between implementations. [[NTT DoCoMo]] has established [[de facto]] standards for the encoding of URLs, contact information, and several other data types.<ref>{{cite web |url=http://www.nttdocomo.co.jp/english/service/imode/make/content/barcode/function/application/ |title=Synchronization with Native Applications |publisher=[[NTT DoCoMo]] |accessdate=17 February 2009}}</ref> The open-source "ZXing" project maintains a list of QR code data types.<ref>{{cite web |url=http://code.google.com/p/zxing/wiki/BarcodeContents |title=Barcode Contents |work=zxing&nbsp;– A rough guide to standard encoding of information in barcodes |accessdate=17 February 2009}}</ref>

== Design ==