[sane-devel] Sane & calibration: help needed!

[Gerhard Jaeger]

On Monday 18 April 2005 19:12, NM Lists wrote:
>=20
> No idea?
>=20
> Le samedi 09 avril 2005 =C3=A0 01:54 +0200, NM Lists a =C3=A9crit :
> > Hi all,
> >=20
> > When I scan through sane+xsane, the images on my Canon Lide20 show a
> > calibration problem; the left side of the image is much clearer than the
> > right side. However, with the Canon drivers on Windows, after having hit
> > the "calibrate" button, said driver performs corrections so that such
> > artifacts disappear.
> >=20
> > Here's an example, a scan of a plain grid paper with some handwriting on
> > it:
> >=20
> > Windows driver: http://maman.monnet.biz/~nico/xsane/Scan1.JPG
> > Sane (xsane through gimp):
> > http://maman.monnet.biz/~nico/xsane/result_xsane.jpg
> >=20
> > I looked hard but could'nt find a way to get sane to calibrate; as far
> > as I can tell, "calibration" in the config files refer merely to
> > page-wide adjustments (gamma, contrast, luminosity ..). In this case, it
> > needs to be done on a pixel column basis.
> >=20
> > Any idea on how to solve this?
> >=20
> > Thanks a lot!
> >=20
Sorry for not responding! Currently I really don't have an idea, but it sho=
uld
be a problem of the fine calibration...
I'll do some investigations on that.

Gerhard