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Line 5: A '''QR code,''' short for '''quick-response code''',<ref>{{cite interview \|last=Hara \|first=Masahiro \|subject-link=Masahiro Hara \|interviewer-last=Muller \|interviewer-first=Derek \|interviewer-link=Derek Muller \|title=I used to hate QR codes. But they're actually genius \|date=1 October 2024 \|at=34:09 \|url=https://www.youtube.com/watch?v=w5ebcowAJD8&t=2049 \|access-date=1 October 2024 \|quote=The biggest feature of QR codes is that they can be read quickly. It's called Quick Response because it reacts quickly.}}</ref> is a type of two-dimensional [[Barcode#Matrix (2D) codes\|matrix barcode]] invented in 1994 by [[Masahiro Hara]] of the [[Japan]]ese company [[Denso#DENSO Wave\|Denso Wave]] for labelling automobile parts.<ref>{{Cite journal\|last1=Hung\|first1=Shih-Hsuan\|last2=Yao\|first2=Chih-Yuan\|last3=Fang\|first3=Yu-Jen\|last4=Tan\|first4=Ping\|last5=Lee\|first5=RuenRone\|last6=Sheffer\|first6=Alla\|last7=Chu\|first7=Hung-Kuo\|date=2020-09-01\|title=Micrography QR Codes~~\|url=https://ieeexplore.ieee.org/document/8632711~~\|journal=IEEE Transactions on Visualization and Computer Graphics\|volume=26\|issue=9\|pages=2834–2847\|doi=10.1109/TVCG.2019.2896895\|issn=1077-2626\|pmid=30716038\|~~s2cid~~bibcode=~~73433883\|access-date=21 April 2021\|archive-date=21 April 2021\|archive-url=https://web~~2020ITVCG.~~archive~~.~~org/web/20210421010504/https://ieeexplore~~26.~~ieee.org/document/8632711/~~2834H \|~~url-status~~s2cid=~~live~~73433883}}</ref><ref>{{Cite journal\|last1=Chen\|first1=Rongjun\|last2=Yu\|first2=Yongxing\|last3=Xu\|first3=Xiansheng\|last4=Wang\|first4=Leijun\|last5=Zhao\|first5=Huimin\|last6=Tan\|first6=Hong-Zhou\|date=2019-12-11\|title=Adaptive Binarization of QR Code Images for Fast Automatic Sorting in Warehouse Systems\|journal=Sensors\|volume=19\|issue=24\|pages=5466\|doi=10.3390/s19245466\|pmc=6960674\|pmid=31835866\|bibcode=2019Senso..19.5466C \|doi-access=free}}</ref> It features black squares on a white background with [[fiducial markers]], readable by imaging devices like cameras, and processed using [[Reed–Solomon error correction]] until the image can be appropriately interpreted. The required data is then extracted from patterns that are present in both the horizontal and the vertical components of the QR image.<ref name=autogenerated1/> Whereas a barcode is a machine-readable optical image that contains information specific to the labeled item, the QR code contains the data for a locator, an identifier, and web-tracking. To store data efficiently, QR codes use four standardized modes of encoding: [[Number\|numeric]], [[Alphanumericals\|alphanumeric]], [[Byte pair encoding\|byte]] or [[Binary number\|binary]], and [[kanji]].<ref name="QRCodefeatures">{{cite web \|url=http://www.qrcode.com/en/qrfeature.html \|title=QR Code features \|publisher=Denso-Wave \|access-date=3 October 2011 \|archive-url=https://web.archive.org/web/20130129064920/http://www.qrcode.com/en/qrfeature.html \|archive-date=2013-01-29}}</ref>

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