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FWIW, QR isn't the best option for the real world - it's extremely fragile and susceptible to damage compared to DataMatrix, the other commonly used 2D symbolog
by dublin 4y ago
FWIW, QR isn't the best option for the real world - it's extremely fragile and susceptible to damage compared to DataMatrix, the other commonly used 2D symbology. DoD uses DataMatrix for marking all aircraft and other components for traceability, for instance.
I've used it on oilfield prototypes just printed on weatherpoof laser labels, and they're still readable even with big gouges and divots missing. By contrast, despite the redundancy, you can scrog a QR code with a single unfortunately placed scratch. (As I reconfirmed out this week trying to read the wiki/docs link for a secondhand laser cutting module I picked up: a screw on the rail had dragged through the QR code in a horizontal line - not through the timing section, but enough to make it unreadable. Fortunately, the model is identifiable visually on the mfr's site, so I can be sure what kind of safety goggles I need!)
- lifthrasiir 4y ago> [...] a screw on the rail had dragged through the QR code in a horizontal line - not through the timing section, but enough to make it unreadable. Given that two timing patterns are perpendicular to each other, how is that possible? Did the line come from the rightmost boundary and stop before the vertical timing pattern? Then there should be no real difficulty in reading that and it might well be a decoder problem.
- crispyambulance 4y agoYeah datamatrix, IMHO, is superior: more density and you got options for rectangular rather than just square symbols. The finder and alignment patterns in QR-code just take up space and don't seem to help very much, but I can't back that up. Maybe some scanners can really do better with QR?
- WelcomeShorty 4y agoVery interesting but since (my) iPhones can't use / read them, out of the box, there is very little change I will be using them anytime soon.