[sane-devel] Scan Correction Program! :)

[Ekkehard Morgenstern]

Sounds interesting, but have a look at the image in the archive (linked
to in my original post below), named "white.jpg". It's what comes out
when I scan a blank sheet of paper. There's really no telling where the
white point is, because it is different for /every pixel/ on a scan
line. Hence, my program stores a file called "white.shape" to store the
average waveform of scale factors for each RGB component that need to be
multiplied with the scanner data to produce white.


On Mon, 2008-05-12 at 11:35 +0200, Nicolas wrote:
> If you scan with Xsane frontend, there's an integrated color calibration
> tool using 3 pipettes of white, black and gray:
> 
> http://www.xsane.org/doc/sane-xsane-preview-doc.html
> 
> This gives overall good results, and, with a PIXMA MP610, this color
> calibration can be done once (calibration settings can be stored in a
> "medium definition"), and reused for further scans. Pretty easy to use,
> and efficient.
> 
> Nicolas
> 
> 
> Le dimanche 11 mai 2008 à 15:42 -0400, m. allan noah a écrit :
> > On 5/11/08, Jürgen Ernst <jrernst at gmx.de> wrote:
> > > m. allan noah schrieb:
> > >
> > > > what scanner did you use that produces such poor calibration?
> > >
> > > > ...
> > >
> > > >
> > >  >>  Have a look at it here:
> > >  >>  http://www.ekkehardmorgenstern.de/scancorrect-0.1.tar.gz
> > >
> > >
> > > Unzipping his files gives a readme.txt and there you can find:
> > >     Mustek BearPaw 1200F
> > >
> > 
> > I read the file before it posted, but i did not see the scanner until
> > now. thanks!
> > 
> > Ekkehard- another choice might be to do this sort of calibration
> > inside the driver in sane, but that would require becoming familiar
> > with the code of the sane backend which drives the scanner....
> > 
> > allan
> > -- 
> > "The truth is an offense, but not a sin"
> > 
> 
>