[filmscanners] RE: Scanning B & W

["Austin Franklin" <darkroom@ix.netcom.com>]

Hi Simon,

Why I ask, is because I was curious if the setpoints got set in the scanner,
even though you get raw scan data.  It could very well do that, and would be
a good option, in my opinion.

A few of the scanners I designed had analog setpoints, and adjusted the
output from the CCD so that the setpointed area matched the input voltage
range of the A/D, and therefore increased the tonal resolution within the
valid image space.  It doesn't mitigate the noise, but it brings the noise
into the digital domain, where it can be processed.

Regards,

Austin


> Absolutely correct.  I have been listening and I have learnt ;-)
>
> Simon
>
> On 23/4/02 11:22 pm, "Austin Franklin" <darkroom@ix.netcom.com> wrote:
>
> >> I am getting excellent results scanning on the Sprintscan 120 as
> >> it scans in
> >> raw and then converts to greyscale.  What I now do is scan in
> raw format
> >> using Silverfast (Greyscale 16-bit HDR format), invert in
> >> Photoshop, adjust
> >> the levels and the resultant image is usually just about spot on,
> >> with more
> >> detail than I have seen with RGB or greyscale scans.
> >
> > Hi Simon,
> >
> > I assume you also set the setpoints in PS (not just
> levels/invert), right?
> >
> > Regards,
> >
> > Austin

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