[sane-devel] sane-coolscan2.

Major A andras@users.sourceforge.net
Tue, 14 Dec 2004 09:27:30 +0000

> > The scanner doesn't support anything but RGB(+I). I made the decision
> > not to include code that converts from RGB to greyscale into the
> > backend, this should really be done on the frontend side or in GIMP or
> > similar.
> Are you sure? I think I read somewhere that the scanner support grayscale,
> RGB and CMYK.

The scanner samples four colours: RGB + IR. There's nothing else the
scanner can output, and because of the way it's designed, it can't
even sample greyscale. Any conversion to any other colour space must
be done in software. As far as I'm aware, scanners never support CMYK,
which is an anachronism anyway. Maybe scanner _drivers_ do, but that's
another story.

> > It isn't implemented yet. The IR readout works, but the driver side of
> > ICE is not yet available in SANE. It isn't simply a hardware feature
> > that needs enabling.
> What do you mean? I need it? :P But do you know another tool for removing
> dust and scratches?

ICE is a combination of an IR channel being supplied by the scanner
and some filtering code that makes use of it. The latter isn't
implemented in SANE yet.

> But it would be nice to have it supported in hardware.

ICE is not a pure hardware feature, there's nothing we can do about