[sane-devel] Affordable film scanner supported by SANE

[Major A]

Jonathan,

I think you have a strong bias towards VueScan. That's fine, but it
doesn't mean we have to give up coding to make things better. And it
certainly doesn't mean SANE is by definition inferior to VueScan.

> > Orange mask: at least with Coolscan2, this one is trivial: adjust the
> > exposure times of the R, G, B channels so that the space between two
> > frames comes out exactly white. If you then scan with these settings
> > and invert, all colours will be correct, and you have used the scanner
> > at its best -- you get the best possible noise performance out of it. 
> 
> Yes you can do it. Does it match up to what VueScan does, and the ease
> with which it does it yet; not in the slightest.

What's easier than setting the scanner up (in about 5 minutes) once
for a given type of film and then scan millions of frames with these
settings? No, VueScan doesn't make life easier and doesn't give better
scans either. I've scanned 150 C41 frames at full frame, full
resolution with IR correction with the LS-30, and it didn't take me
more than an afternoon. I don't think VueScan could beat that.

> > Multi-pass scanning: is this really a front-end issue? (Otherwise I'm
> > the culprit here since it's not yet in Coolscan2.) 
> 
> It depends if the scanner supports it and not all do. The basic problem
> is that the SANE standard has no standard way of passing the information
> between frontend and backend on whether you want multipass scanning or
> not.

It the scanner doesn't support it, then it's probably not a very good
idea anyway -- you'll run into registration problems if you scan the
same image multiple times just to get the data to be averaged.

  Andras

===========================================================================
Major Andras
    e-mail: andras@users.sourceforge.net
    www:    http://andras.webhop.org/
===========================================================================