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

Gerhard Jaeger gerhard@gjaeger.de
Mon, 11 Apr 2005 09:36:07 +0200

On Saturday 09 April 2005 01:54, NM Lists wrote:
> Hi all,
> 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.
> Here's an example, a scan of a plain grid paper with some handwriting on
> it:
> Windows driver: http://maman.monnet.biz/~nico/xsane/Scan1.JPG
> Sane (xsane through gimp):
> http://maman.monnet.biz/~nico/xsane/result_xsane.jpg
> 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.
This should normally be done by the backends fine-calibration.
Which SANE version are you using?