Digital BW, The Print

>
> Thank you Tony, Lincoln and others. What is getting lost is my original
> question: "The question I have is how do I best evaluate - on screen -
> scans of the same frame made at two different resolutions?"
>  _
>

Well, you have a couple of choices, none of which is perfect.  First, you
could up-sample the smaller photo.  The problem is that this will make that
up-sampled file look worse than it it.  Second, you could down sample the
bigger file, which will make it look better than it is.  Third, you could
view the files at different magnifications, such that the image elements are
the same size on your screen.  All of these methods interpolate the data.
As such, how this is done will effect the results.  If it were me, I'd
choose the second option along with looking at prints.  After all, the main
question is whether the higher res scan gives any benefit.  If after
down-sampling, which should increase the quality of the higher-res file,
there still isn't any difference with the lower res scan, then there's no
point in doing the higher res scan.


[Non-text portions of this message have been removed]