$ ./sample/simple/simpletest ~/Desktop/0004.jpg
libdecodeqr version 0.9.3 ($Rev: 42 $)
this is a test
Hit any key to end.
It looks like libdecodeqr works for decoding QR Codes from images however it does not appear to perform reliably on small images or highly distorted images such as the one below. It is however very fast and uses opencv for image processing.
My beverage retrieval robot will require more advanced techniques to reliably locate the correct container.