Servus,
I'm not replying as an expert here, only to ask a question: Does you
Maxify scan both sides in one shot from ADF or does it turn the page to
scan the other side? It seems to me having seen 3 or 4 of them, that
most Canons nowadays include the one-shot-scanning feature (it probably
has a real name). That could make a difference in the appearance as
compared to flatbed scanning, because I would guess the sensors to be
different.
Regards,
Andrea
On 19.05.21 17:46, Dr Rainer Woitok wrote:
Greetings,
since our good ol' Canon Pixma MX885 has eventually reached its End Of
Life, we've bought a Canon Maxify MB5150. And because
http://www.sane-project.org/sane-mfgs.html
listed this scanner as using the same "pixma" backend as the MX885, I
just had to update the IP address in "~/.config/sane/pixma.conf" to acc-
ess the new scanner via "scanimage". However, scanning the same single
page from flatbed or via ADF produced significantly different results:
- The PNG file from the flatbed clearly showed the original paper hav-
ing been rather thin, since some colours from the reverse side shone
slightly through, and the background colour having been faintly grey
rather than white. In other words, this PNG file was a fairly good
copy of the original.
- But the PNG file from the ADF did show almost no shine through and a
more or less purely white background. Dark colours appeared slight-
ly darker and light colours slightly lighter than the original. The
effect was somewhat similar to using ImageMagick's "-normalize" opt-
ion.
While this sort of normalization seems good to have, if one needs it, I
would prefer controlling it via options to "scanimage" rather than via
the scanning source.
Is there some way to prevent this normalization effect for the MB5150
when scanning via ADF?
Oh, almost forgot: using "media-gfx/sane-backends" version 1.0.31-r2 on
Gentoo.
Sincerely,
Rainer
