==== Encode/Decode QR Code Images to the text value ====

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Install the required tools:
<code bash>
# to encode text into a qr image
apt install qrencode

# to decode an image into the text value
apt install zbar-tools
</code>

Usage for the installed tools
<code bash>
# generate and display a QR code
qrencode "Hi This is my 2d code." -o 2d.png
display 2d.png

# parse an QR image file to text
zbarimg 2d.png
>>> QR-Code:Hi This is my 2d code.
>>> scanned 1 barcode symbols from 1 images in 0 second

</code>