> On Sep 21, 2015, at 8:54 AM, Sixten Otto <hims...@sfko.com> wrote:
> 
> Especially given that recent versions of iOS can detect and decode QR codes
> automatically, much like face detection.

And Mac OS, too.

I just looked up some code I wrote a few months ago to do QR-code scanning. 
Here’s the guts of it:
        https://gist.github.com/snej/6440a2e041222018cc7c
And here’s how to generate a QR-code:
        https://gist.github.com/snej/c210cc4cbfe8fd277186

—Jens
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