- Get an extra large QR image at http://qrcode.kaywa.com/
- Open the image in Photoshop
- Image > Image Size - Document Size: 50mm x 50mm, Resolution: 300pxels/inch, Nearest Neighbor (preserve hard edges)
- Select Magic Wand Tool - Tolerance: 100, Check off Anti-Alias, Check off Contiguous
- Select all the black areas
- Copy and paste the black areas onto a new layer
Adobe Photoshop / Resizing QR Code
