Digital BW, The Print

on 11/14/01 12:02 PM, Michael J. Kravit wrote:

> 3. The negative was scanned on a Howtek D4000 drum scanner in Raw 16
> bit Grayscale at 364dpi at a image size of 24x24.  I do this because
> for some reason I find that images scanned at even multiples of
> 100dpi tend to have banding. I scan twice, once for the highlights
> and again for the shadows. I then export the 16bit Raw image into
> Silverfast HDR and make most basic tonal adjustments.


Michael

I appreciate your thorough details.

When you speak of banding from scanning in multiples of 100, do you see it
in the image, or just the print?

When scanning Raw, can you really scan separately for highlights and
shadows? I'm not familiar with how to operate a drum scanner, but from what
I know of my Leaf, it really only scans one way, which is Raw (which yields
that dark linear file which needs tonal expansion). Any manipulations that
are done to the image, in order to bias it towards highlights or shadows, is
done by software (or firmware?) after the capture (though before output). I
don't know if I'm making myself clear. I think what I'm saying is that in my
case I believe scanning raw captures all the dynamic range the scanner is
capable, and any shadow or highlight details from that point can only be
LOST by software manipulation, or enhanced, but not added. Thus with my
scanner there would never be a need to scan Raw twice, as they would both
yield the same scan. Is your scanner different in that way? Is it that the
software allows you to output toned data in 16-bits whereas my scanner can
only output untoned data in 16-bits?

Thanks,
Todd