QRCodes

QR Codes Bridging the physical and virtual worlds with funny-looking barcodes. Tristan Roddis, Cogapp www.QRtists.com

What are QR codes?
2-D barcodes - more data in same space
Invented in Japan in 1994
Error tolerant
Alphanumeric up to 4,296 characters
Support for multiple parts
ISO standard
Similar to: Data Matrix, Shotcode, Quick code

Why are they special?
Because they can be decoded by mobile phones
Built in to many phones (esp. Japan)
Available for lots of others (http://qrtists.com/s)
[insert impressive statistic about mobile phone use here]

Generating QR codes
Websites
Firefox extension
Open source C program: qrencode
PHP/CGI
See list at http://qrtists.com/s

Uses of QR codes
Tracking objects
Business cards
Email sigs
Linking to websites
Adverts

Source: http://www.pinktentacle.com/2007/04/movie-qr-code-and-kung-fu-high-school-girls/

Source: http://www.gearfuse.com/junkfood-maker-prints-qr-code-on-prawn-crackers/

Why is this more interesting?
Physical location maps to virtual location
Same input token provides different output (website maintains state)
Users can be tracked (cookies etc.)
Users provide information just by using the system (web 2.0 Holy Grail!)

Source: http://news.bbc.co.uk/1/hi/technology/6938244.stm

Parting thoughts
Link up to dynamic websites
Use in different situations
Games
Ticketing – concert example
Previewing – music store example
Collecting - museum example
Need an open source reader!

Questions?

http://www.wat-betekent.nl	469
http://www.24per7.pl	96
http://www.slideshare.net	19
http://24per7.blogspot.com	10
http://barcampbrighton.backnetwork.com	8
http://simuli.blogspot.com	5
http://localhost	5
http://webcache.googleusercontent.com	1
http://simuli.blogspot.pt	1
http://www.linkedin.com	1

QRCodes

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