How do I create a 300 DPI QR code with imagemagick? Where I can define width and height in mm.
I have searched on rubygems and found some QR code libraries. But not found a proper solution with imagemagick. I need to generate a ton of qr codes therefor I need some QR library to work with imagemagick because I need to add additional graphic like some background.
rqrcode is a good place to start