Yes Sam, Ive seen that one here in the Cafe before too, but as you say it is a continuous line. That was not my point.
I will try one example on this to show how I do one in PS. Thing is that opposite to what most people think about a fingerprint, it is not that a real fine cut you have to do, a fingerprint is not that micro lined. In fact one can see it real good with the naked eye..
So if you just put some ink on your finger, you can make a print of it on paper. Then put it in the scanner and you have your fingerprint digitalized
In PS you can add this on one layer and adding another one. By making that one on top transparent, you can see both, just like the old newspaper one.
It is not hard to do really