[sane-devel] artec e+pro- vertical lines- some samples

Philip Aston philip.aston at ntlworld.com
Mon Jan 14 23:58:56 UTC 2008

Like to try, I do have the Windows driver but regret don't have the
skills. I'll keep a note of this "just in case". Probably unsubscribe
soon, SANE is an excellent project but I can't do anything with the
advice I've been given, let alone contribute anything. So I'll sign off
by thanking you and Theodore for trying to help. Regards-Philip  

On Mon, 2008-01-14 at 10:15 -0500, m. allan noah wrote:
> On 1/14/08, Philip Aston <philip.aston at ntlworld.com> wrote:
> > All are prints of as near to pure red blue green as I could find using
> > drawing tools on MSword, printer is a Tallygericom colour laser, I see the
> > fabric effect as horizontal/ vertical "tartan". To hopefully exclude this I
> > uploaded "blue2.pnm" which is a slightly darker than mid blue from a
> > flysheet of a book. Regards-Philip
> >
> yeap- looks like bad per-cell calibration in the blue and green
> channels of blue2.pnm, but the red channel clearly shows the size of
> the 'sub-units' that makeup the read head.
> at this point, you would need to get some traces of the calibration
> code in the windows driver (i prefer benoit's usbsnoop), and then
> spend some time trying to improve the calibration the backend does.
> unfortunately, the backend is unmaintained, and this kind of work is
> hardwithout access to the scanner, so it looks like it's all you :)
> allan
> -- 
> "The truth is an offense, but not a sin"

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