Its very easy, Noritsu, has many machines that take a digital file and expose through and LED exposure system on RA-4 paper, we had one at the shop that I worked at, very simple process, you just tell the machine what media your getting the image from, either negative or digital, as well as scanner image, it loads the image onto the computer monitor and makes the exposure, then processes in Chemistry as normal..

The process has actually been around for a number of years now.

Dave