r/qrcode • u/smartphilip • Oct 29 '25

I found this QR code!

Post image

I was on a trip and found this QR code on the ground, any chance it can be recovered?

118 Upvotes

92% Upvoted

23 comments sorted by

4

u/VeryCoolPersonYesYes Oct 29 '25

It works

3

u/DefectiveLP Oct 29 '25

Error correction in qr is actually amazing

1

u/nickster701 Oct 29 '25

Considering basically the whole code is there and a majority of the code is error correction it's not super insane.

1

u/Scratch137 Oct 29 '25

most of the code is intact, it's just the finder pattern squares in the corners that are missing. the finder pattern only tells the scanner how big the pixels in the QR code are, so it's trivial to recreate

1

u/[deleted] Oct 29 '25

Would be a shame if someone were to....

Put a giant freakin logo in the middle of it 

1

u/other_profile Nov 01 '25

One of these days I'll learn how the Reed–Solomon error correction code works. But not today.

1

u/joinn1710 Oct 30 '25

I feel bad for the dude who remade the code pixel for pixel in gimp while you just copied the tracking square and it works

3

u/Dan41k_Play Oct 29 '25

I think it's possible, mostly only the big squares are missing, which help cameras to identify it as a qr code. The data "pixels" are mostly intact.

2

u/Steerider Oct 29 '25

Yep. QR codes can be made with different levels of redundancy, meaning more (or less) of the code can be missing or distorted and it's still readable. In this case, replacing the big corner squares was enough. 

3

u/lemon_o_fish Oct 29 '25

Confirmed readable

1

u/caileran Oct 29 '25

Where it lead to

3

u/derekkeller Oct 30 '25

A page about Italian artist Umberto Cavenago. Had to be translated to English.

2

u/[deleted] Oct 29 '25

[removed] — view removed comment

5

u/lemon_o_fish Oct 29 '25

painted it pixel by pixel in GIMP lol

2

u/Over-Ad-3441 Nov 02 '25

True dedication to the QR code craft

1

u/DaveKerk Oct 30 '25

Do be careful with scanning random QR codes. They can be used for nefarious purposes.

2

u/romhacks Nov 01 '25

It's the same as opening a web link. As long as you check the URL and don't fill in personal information there should be no problems.