I'm a relative newbie, so please bear with me.
When one scans film, the image is physically there, and is scanned to the output size one wishes to have.
My understanding, which may be wrong, unless one goes overboard, no interpolation is needed or done, because through the actual scan, the 'information' is there, in the emulsion, to be used.
Interpolation comes into play when that image has been saved, and then edited again, to increase the physical print size. That the image is increased in size, by adding space between the actual pixels of the image. There is no real 'information' added, but a restructuring of the image so it becomes larger.
Not fully understanding the mathematical undertaking within interpolation, in PS, one can adjust the size of the image in one step, or several, as is often done, at a 10% steps. This is the way I have done it in the past. My research, previous to using SF, seemed to indicate a better image doing it in a step progression, which can done in PS, but it can take a considerable amount of time. Requiring 7 to 11 steps, to finally reach image size needed.
That's PS, this is SF.
With this question, what I am hoping for, is to facilitate an easier editing procedure, in which I do not have to use PS for interpolation.
I know now in HDR, I can unlock, and increase the image size, and it will interpolate to the size I have requested.
But how is this done?
I really do not need the specifics, but is it done in a mathematical manner, that steps it, to give it a better overall image, rather than in just one big step?
As you can tell, I'm at sea here.
Trying to get the very best available print, of some oil paintings, that will be displayed at 11" high x ? with a better work flow, for an art book.