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 ? 15:42 -0400, m. allan noah a ?crit : > > On 5/11/08, J?rgen 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" > > > >
