Create QR codes merged with images.
This package creates QR codes based on image files; the QR code is superimposed on the image, optionally with reduced transparency, such that the readability of the QR code can be maximized (they aren't normally intended to be read from noisy backgrounds such as other images).
pip install prettyqr
Take a background image:
And a URL or some other text:
foo.com
Combine them:
prettyqr --qr-opacity 150 --outfile img/dna-qr.png foo.com img/dna-orig.png
usage: prettyqr [-h] [--border BORDER] [--out-file OUT_FILE]
[--qr-opacity QR_OPACITY] [--qr-red QR_RED]
[--qr-green QR_GREEN] [--qr-blue QR_BLUE]
DATA IMAGE-FILE
Make pretty QR codes.
positional arguments:
DATA Data to encode (e.g., "http://example.com").
IMAGE-FILE Image file to composite (e.g., "lena.jpg").
optional arguments:
-h, --help show this help message and exit
--border BORDER Size of border (in multiples of QR module size).
Defaults to 4. Can be zero if the QR code is intended
for printing or use on a light background.
--out-file OUT_FILE Path to write composite image file to. Extension will
determine the output format. Defaults to
"prettyqr.png".
--qr-opacity QR_OPACITY
Opacity of the QR code modules, between 0 (invisible)
and 255 (opaque). Default is 200.
--qr-red QR_RED Red element of the QR module color, between 0 and 255.
Default is 0.
--qr-green QR_GREEN Green element of the QR module color, between 0 and
255. Default is 0.
--qr-blue QR_BLUE Blue element of the QR module color, between 0 and
255. Default is 0.
prettyqr is a fairly raw proof-of-concept, and currently has an assortment of limitations:
- Only supports square images.
- Only supports square QR modules.
- Doesn't support complex color changes in the source image.
It will work best with sources where the focus of the image is not central, and doesn't handle black backgrounds very well.
All of these issues are fairly tractable; patches are welcome.