인코딩

BIZCARD:N:Sean;X:Owen;T:Software Engineer;C:Google;A:76 9th Avenue, New York, NY 10011;B:+12125551212;E:srowen@google.com;;

디코딩

libdecodeqr 

$ sudo apt-get install libdecodeqr-dev libdecodeqr-examples

test run examples 

$ cd /usr/share/doc/libdecodeqr-examples/
$ libdecodeqr-simpletest debian.or.jp.qr.jpg 
STATUS=2080
http://www.debian.or.jp 
 
MEBKM:TITLE:DebianJP;URL:http\://www.debian.or.jp;;
 
Hit any key to end.

test with webcam 

libdecodeqr-webcam 
libdecodeqr version 0.9.3 ($Rev: 42 $)
Hit [SPACE] key to grab, or any key to end.
 
adaptive_th_size=23, status=2080
http://www.suapapa.net