Very interesting video, I had no idea the level of redundancy built into QR codes. Thanks!
How QR codes work
Submitted 8 months ago by UraniumBlazer@lemm.ee to technology@lemmy.world
https://youtu.be/w5ebcowAJD8?si=GQcmXcl-HRt7bJyZ
Comments
Killer_Tree@sh.itjust.works 8 months ago
UraniumBlazer@lemm.ee 8 months ago
Very interesting video, I had no idea the level of redundancy built into QR codes.
RIGHT?!! Same here. I didn’t know there was SO MUCH of thought put behind QR codes. I always assumed they were just bits visually represented in 2D with the three black squares being there for alignment purposes. Turns out it is a lot more complicated than that hehe
Thanks!
Np <3
200ok@lemmy.world 8 months ago
Same! And now I know why my phone is able to scan a QR code, even when it’s only partially in the frame/border that comes up.
Semi_Hemi_Demigod@lemmy.world 8 months ago
I remember back when they first started getting popular I was at a conference and told a marketing person that we should make one instead of giving folks a long url. The marketing person said “I don’t know if we have the budget to register one.”
I used to think that this was because the marketing person didn’t know how they worked, but now I know that they thought it worked like UPCs.
Shout out to Masahiro Hara for not asserting his patent rights so this incredibly useful tool could be free.
catloaf@lemm.ee 8 months ago
If he didn’t, one of the several other 2D barcodes would have caught on. I see non-QR ones around pretty often, though usually in industrial applications.
I remember back around 2009, there were a few of these in the newspaper: en.wikipedia.org/…/High_Capacity_Color_Barcode
I don’t know how well it worked given the loose color registration. I didn’t have anything that could read them at the time.
echodot@feddit.uk 7 months ago
Are you sure they weren’t just test colors? Most newspapers have them.
I cannot imagine what information they needed to encode that required that level of information density.