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
