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Offline QR Code possibility? (lemmy.ml)

submitted 2 years ago by Gmork@lemmy.ml to c/asklemmy@lemmy.ml

34 comments fedilink hide all child comments

Is there anything similar to a QR code that works offline?

Say I have a flyer that I want to discreetly distribute and there is no internet.

Is there something like a QR code that contains the data itself and not just a URL?

This way someone with no data plan could scan the icon/code with an app and the unrecognizable bits and bytes from the icon/code would show up on their screen as a .JPEG of a flyer or something.

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[–] liwott@nerdica.net 7 points 2 years ago (1 children)

I didn't know there was an actual limit to the size of a QR code, but as we see a big problem with (raster) images is that the QR code rapidly becomes much more complex than the image itself

[–] southerntofu@lemmy.ml 6 points 2 years ago (2 children)

Vector images can be a good fit though! If you can fit a URL in there, a SVG could fit in too :)

[–] liwott@nerdica.net 4 points 2 years ago (1 children)

I agreed a priori, which, as you probably guessed, is exactly why I put that parenthesis 😀 But I think in practice the starting point already is too complex. For example, I opened inkscape and saved the empty image, the result is already more than 1KB. Similarly, Lemmy's very simple logo is already 3KB.

[–] southerntofu@lemmy.ml 5 points 2 years ago (1 children)

SVGs can be minified after edition, but of course nothing will beat hand-crafted SVGs...

[–] liwott@nerdica.net 2 points 2 years ago

Thanks for the clarification ! This indeed makes the code readable, although way more complex than the original logo. Also, not everyone has an app able to read that svg on their smartphone

[–] Amicchan@lemmy.ml 4 points 2 years ago

Yep. It's another advantage of Vector Graphics.