Re: umax-backend

Jonathan A. Buzzard (jab@hex.prestel.co.uk)
Mon, 01 Sep 1997 00:42:25 +0100

David.Mosberger@acm.org said:
> Unfortunately, neither GIMP nor PPM support more than 24 bpp so the =

> real thing that's missing is frontend support. Incidentally, isn't =

> 30 bpp mode normally used to achieve higher resolution through =

> interpolation? I imagine such a feature would be more useful for the =

> average user than 30bpp support---though I'm not claiming that 30bpp =

> is never useful. =

On a the only quality assurance program I have ever seen for a scanner,
the low couple of bits where just noise (a =A320,000 12bit grayscale scan=
ner
for X-Ray films using a stablised HeNe laser and a photomultiplier tube).=

I doubt it is any different on a compartitvely cheap UMAX scanner with a
CCD and flurescent lighting, so just chuck the two low bits from each cha=
nnel,
which are probably noise anyway and treat it as a noiseless 24bit scanner=
=2E

JAB.

-- =

Jonathan A. Buzzard,
34 Kepwell Road, Prudhoe, Email: jab@hex.prestel.co.uk
Northumberland. NE42 6PD Tel: +44(0)1661-832195
United Kingdom

--
Source code, list archive, and docs: http://www.azstarnet.com/~axplinux/sane/
To unsubscribe: mail -s unsubscribe sane-devel-request@listserv.azstarnet.com