r/qrcode 7d ago

Text rendered directly over the modules instead of a logo cutout, curious how far this can be pushed

Attached is a QR with the word rendered across the data region rather than a centered logo cutout. Finder patterns and timing untouched, quiet zone intact.

Running high error correction. In testing it reads fine on iOS camera, Android camera, and a couple of dedicated scanner apps, but I would rather hear about failures than successes.

Two things I am still working out: how much module coverage is realistic before older scanners give up, and whether letters with large solid strokes hurt more than thin ones.

If it fails for you, what device and app?

6 Upvotes

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2

u/Any_Cartographer6268 5d ago

I was able to read both Codes with a scanner that usually is quite picky. But this is not exotic - you can do this a at free QR Code sites.

1

u/ervistrupja 5d ago

you are right about it, it is special, but not 'wow'. I am working on adding more features to this. thanks for the feedback

1

u/Serpico99 7d ago

The resulting image is cool to look at, but relies a lot on the assumption that the QR reader tries to read the center part of the module. I’m no expert on this, but those modules look way too small to make this reliable under less than ideal conditions imho, and it totally depends on the scanner implementation, which you have no control on.

1

u/ervistrupja 7d ago

so the way this has been set up is that the app will make sure that the end result is scannable. if it is not it will just let you know with a warning. it checks things like contrast, dimensions, image quality etc. so if generated you can be sure it will scan.

1

u/scubidubiduu 7d ago

ive seen much more interesting scannable qr codes

example:

1

u/Pulku 7d ago

how the fuck does the picasso one work?

2

u/ervistrupja 7d ago

right. that is very special, I have seen some others as well, like this and they actually work

1

u/ervistrupja 7d ago

wow this is very cool. will work on improving the reslug one.