====== qrcode ======

QR code / 2D code / qrcode

===== reading from image =====

<code bash>
sudo apt install zbar-tools

zbarimg Baeldung-website-QR-code.png 
</code>

===== searching for QR codes in current window =====

<code bash>
while :; do date; import -silent -window root bmp:- | zbarimg -q -; sleep 1; done
</code>

===== generating code =====