Take the 2-minute tour ×  I'm in the process of producing QR-
codes for use on product packaging. The codes are generated in
batch and the resulting files are typically 25x25 px PNG files.
Of course, such a small image would normally be way too low res
to use in print, i.e. a 1x1 inch image would need to be 300x300
px in order to print in 300 DPI.  When it comes to simple images
such as QR-codes (I guess this would also apply to bar codes
without the digits) I realized that the actual resolution of the
image is not really relevant, as I can easily resize the image
to any size I prefer using nearest-neighbor resizing option in
Photoshop. In a way, the resulting 250x250 px image won't
contain any more information in terms of "QR pixels" than the
25x25 px version, apart from the obvious fact that the file will
be larger in size. Also, when resizing to a width not evenly
divisible by 25 (e.g. 70x70) the resulting QR pixels will not
all be the exact same width.  This has got me thinking I can
simply place the 25x25