Gregory's Server@blinry @piko To follow the talk was quite fun. Most probably I will never try to decode a QR code by hand.
Regarding the separators. It's mentioned there need to be empty lines around the finder pattern, highlighted on two sides. When I place the QR code on a black background it cannot be scanned any more.
* Has a QR code always to be placed on a white/light background?
* Must empty lines surround the whole finder patterns?
* Is it just a weakness in the QR code readers?
* What do I miss?
@lamitpObuS Yeah, the QR Code standard says that there's supposed to be a "quiet zone" around the code (which should be filled white). So that's probably what's happening there! If the quiet zone is not there, your reader doesn't recognize the code. @piko