[sane-devel] pixma MP810 working with sane

[Nicolas]

Yes, the stripes are a known issue with MP810 at 2400 and 4800 dpi,
seems specific to Canon's CCD sensors. 
Same thing happens on MP970, but at 4800dpi only, and as it was easier
to circumvent, some code for MP970 has been added to get rid of those,
4800 dpi is now OK on MP970. 
I'll have a look to see with the images you sent, if we can use also
this code (which is easily tunable) for MP810, and will keep you posted.

Nicolas

Le samedi 18 octobre 2008 à 14:04 +0900, WATANABE Kazuhiro a écrit :
> Hi, all.
> 
> I'm also a Canon MP810 user.  It has worked on FreeBSD 7.0-RELEASE
> with the sane snapshot (2008-10-15) and libusb-0.1.12 (cannot work
> with the uscanner driver).
> 
> Scanning under 1200 dpi has no problem (great!).
> But scan images at 2400 and 4800 dpi are a bit strange.
> 
> I posted some color scan images (from 75 to 4800 dpi) to the URL below
> (about 4MBytes).  If more information is needed, please ask me.
> 
>  http://homepage2.nifty.com/dumb_show/unix/work/mp810_color_sane-2008-10-15_01.tar.bz2
> 
> 
> At Wed, 03 Sep 2008 22:06:02 +0200,
> nicolas.martin at freesurf.fr (Nicolas) wrote:
> > Jean Nicolas,
> > 
> > Dunno if you followed latest discussions for MP810, improvements have
> > been made for this PIXMA in Sane pixma backend, and most issues are
> > solved.
> > Would you mind getting the latest CVS and giving a try, we still have
> > some doubts with the 2400 dpi and 4800 dpi scan modes. 
> > 
> > Nicolas
> > 
> > Le lundi 18 ao?t 2008 ? 13:24 +0000, Jean-Nicolas Gautier a ?crit :
> > > Hello,
> > > I bought a pixma MP810 one year ago. It works but I have the problem 
> > > with color alignment : yellow, magenta and cyan layers are shifted.
> > > If any developper want informations about MP810 working with sane, don't 
> > > hesitate to ask me, I'll be happy to help you.
> > > Currently, I use sane-backends from CVS, updated few weeks ago.
> > > Thank you for the work you've done with sane project.
> > > 
> > > J.-N. Gautier
> ---
> WATANABE Kazuhiro (CQG00620 at nifty.ne.jp)
>