[sane-devel] problems with scanimage

[Henning Meier-Geinitz]

Hi,

On Thu, Dec 15, 2005 at 01:02:30AM -0800, johon Doe wrote:
> > By the way, which backend and scanner do you use?
> > 
> ok, I undestand.. I use epson backend..

> > Thwe option "halftoning" seems to exist in your
> > backend, but it
> > doesn't work in the current mode. maybe it works in
> > mode "lineart"?
> 
> no it doesnt work ..

>From a quick grep through the epson backend source code I get the
impression that not all scanners support halftoning. Maybe yours
doesn't?

Maybe the epson backend maintainer can comment on this?

> > > scanimage --brightness 1 >> prova4.tiff
> 
> > It's similar in this case. The order of options is
> > important, by the
> > way. Setting the mode before brightness may help if
> > gray mode uses
> > option brightness.
> > 
> 
>  $ scanimage --mode Gray --brightness 1
> scanimage: attempted to set inactive option brightness

Same as above.

> Anyway I forgotten to say that the epson scanner is
> over the lan (with saned) and if I use sanetwain on
> win32 I see lot's of options are disabled but if I use
> xsane on linux all options work fine...

Are you sure that you use the same backend in both cases?
E.g. epson and epkowa could provide different options in principle.
If the same backend provides differnt options depending on if it's
used locally or over the net that would be a bug.

You can check this by comparing the output of:
scanimage -d epson --help
with
scanimage -d net:localhost:epson --help

Bye,
  Henning