sungjung:
Hi !
In fact, we changed our minds. Apparently, the Arduino is very bad to recognize images, so what we will do is to analyse the QR codes with a mobile app and then send the information to the Arduino card. It will be much more easier for us ! Now we just have to search how to send the information to the Arduino...Anyway, thanks a lot for all your precise and great anwsers, much appreciated !
Although you said "young" because you said "electronics students" I thought you might be at University.
Since you know about logic operations and have done some programming this should still be possible.
Your first post was in Jan though so you have wasted 4 weeks, unless other things have been happening.
How many of you are there?
Have you managed to take a photograph of a QR code with the Arduino meeting the restrictions in reply #10 ?