hmm, can you try to get a debugging log like so: SANE_DEBUG_CANON_DR=35 scanimage --resolution 100 > test.pnm 2>test.log
then send me a compressed version of test.log? allan On Mon, Apr 20, 2015 at 7:45 PM, Nicolas Marchildon <nico...@marchildon.net> wrote: > Duplex & resolution appear to be interpreted, since the number of files and > scanning speed varies, but the ouput is always a black image. > > Tried combinations of: > > scanimage --resolution {100,600} {,--mode Color} {,--source "ADF Duplex"} > --batch > > > Le lun. 6 avr. 2015 à 21:40, m. allan noah <kitno...@gmail.com> a écrit : >> >> I have attached a patch which will hopefully improve the situation. I >> have guessed at most of the parameters, and so we might have to >> experiment. Please apply this to a current git repo, and try some >> scans, simplex, duplex, color, gray, etc. >> >> allan >> >> On Wed, Apr 1, 2015 at 9:57 AM, Nicolas Marchildon >> <nico...@marchildon.net> wrote: >> > Le mar. 31 mars 2015 à 21:56, Nicolas Marchildon >> > <nico...@marchildon.net> a >> > écrit : >> >>> >> >>> Can you get another usb log from windows, but this time with a low >> >>> resolution, color duplex scan, of only the top of the paper? If the >> >>> front side could have RGB written in those colors, and the back side >> >>> could be blank or have black writing, that would help. >> >> >> >> >> >> I'll do that tomorrow. I have attached what I plan to scan. I assume a >> >> large font is going to make it easier to spot. >> > >> > >> > I cut the bottom of the sheet off in an attempt to reduce file size, but >> > it's slightly bigger. I can't go lower than 150 dpi. >> > >> > https://drive.google.com/file/d/0B1s3C34oDHi5UkowLTVaZDZsSVk/view >> >> >> >> -- >> "well, I stand up next to a mountain- and I chop it down with the edge >> of my hand" -- "well, I stand up next to a mountain- and I chop it down with the edge of my hand" -- sane-devel mailing list: sane-devel@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject "unsubscribe your_password" to sane-devel-requ...@lists.alioth.debian.org