My patch did not change anything about 240dpi, since you said that was already working. I think perhaps there is something else going on here. Can you power cycle the scanner after each test?
allan On Wed, Mar 16, 2016 at 1:45 PM, el-ti <[email protected]> wrote: > Oh! Mea culpa – I missed that point. But now the scanner works again, > and the behavior changed! – That’s the good news. Not so good news is, > that now I have the following: > > Resolutions 300 and 600 have the right colors. > > Scanning with 100,150, 200 and 400 is now: > Blue -> Green > Green -> Red > Red -> Blue > > Scanning with 240 is now: > Blue -> Red > Red -> Green > Green -> Blue > > I don’t know if it helps, but I created a pdf document with scans in > color mode of the same page with the different resolutions in ascending > order: 100,150,200,240,300,400,600 > > You can get it here: > https://de.owncube.com/index.php/s/KaSuVc4vRFWdOk4 > > What you can also see there, is that there is a color strip on the left > side and that the page is a bit shifted horizontally – but this is not > our discussed problem at the moment. > > I hope this helps you. > > Thanks! > el-ti > > Am 16.03.2016 um 15:01 schrieb m. allan noah: >> Did you install libusb-devel before you compiled sane-backends? >> >> allan >> >> On Wed, Mar 16, 2016 at 9:29 AM, el-ti <[email protected]> wrote: >>> All right, I’m pretty sure I got everything right, but surprisingly the >>> scanner is not detected anymore... ("scanimage -L" only gives back the >>> internal notebook camera) – is it even possible, that this is caused by the >>> steps above? Or did I do something wrong? >>> >>> Sorry for all the work… >>> >>> >>> Am 16.03.2016 um 13:24 schrieb m. allan noah: >>>> 1. Download sane-backends-git snapshot from: >>>> http://www.sane-project.org/snapshots/ >>>> >>>> 2. In a terminal, cd to the directory where you downloaded the file >>>> (perhaps ~/Downloads) >>>> cd ~/Downloads >>>> >>>> 3. Extract the file (update name as required) >>>> tar xzf sane-backends-gitXXXXXXXX.tar.gz >>>> >>>> 4. Change into the source directory (update name as required) >>>> cd sane-backends-gitXXXXXX/ >>>> >>>> 5. Apply the patch (update location as required, perhaps also ~/Downloads) >>>> cat ~/Downloads/cdr-55a.diff | patch -p1 >>>> >>>> 6. Then you need to follow the instructions at >>>> http://www.sane-project.org/README.linux That will have you installing >>>> an updated version of sane-backends in /usr/local, where it has a >>>> reduced change of causing problems for your system. >>>> >>>> Let me know if you have questions. >>>> >>>> allan >>>> >>>> On Wed, Mar 16, 2016 at 6:38 AM, el-ti <[email protected]> wrote: >>>>> Thank you very much for your work. >>>>> >>>>> Unfortunately, I have no experience with patching something like this so >>>>> far. I did some research, though – seems to be quite doable. I’m familiar >>>>> with the terminal etc. As I understand this, I have to apply the >>>>> diff-file on the original file with the patch command. So far, so good – >>>>> but I have no idea, which file it is. I couldn’t figure out by looking at >>>>> the diff file. >>>>> >>>>> If you could tell, on which file I have to apply this, that would be >>>>> great! Thanks! >>>>> >>>>> Tobias >>>>> >>>>> >>>>> Am 16.03.2016 um 01:33 schrieb m. allan noah: >>>>>> I have attached a patch for the sane-backends source code. This >>>>>> attempts to provide alternate color de-interlacing for your scanner. >>>>>> It does not attempt to fix any edge cropping issues. Let me know if >>>>>> you need more instructions. >>>>>> >>>>>> allan >>>>>> >>>>>> On Tue, Mar 15, 2016 at 7:59 PM, m. allan noah <[email protected]> >>>>>> wrote: >>>>>>> Canon scanners often have this variable interlacing at different >>>>>>> resolutions, so I am not surprised to see this. However, this >>>>>>> particular scanner has the weirdest interlacing that canon does. If >>>>>>> you can compile from source, I can send you some patches to try. See >>>>>>> http://www.sane-project.org/README.linux >>>>>>> >>>>>>> allan >>>>>>> >>>>>>> On Tue, Mar 15, 2016 at 9:17 AM, el-ti <[email protected]> wrote: >>>>>>>> Unfortunately, yes. >>>>>>>> >>>>>>>> I uninstalled "cndrvsane-drc125" and restartet the system. The color >>>>>>>> shift is still there. >>>>>>>> >>>>>>>> And there is also the problem, that there is a 1/2 cm cut on the long >>>>>>>> edge of the scanned page (the "duplex-offset" option only handles the >>>>>>>> short edge) – but I guess this is another problem. >>>>>>>> >>>>>>>> If you need more information, do not hesitate to tell me. >>>>>>>> >>>>>>>> el-ti >>>>>>>> >>>>>>>> Am 15.03.2016 um 12:41 schrieb m. allan noah: >>>>>>>>> If you uninstall the Canon "DR-C125 Driver for Linux V1.0 (v1.0)" >>>>>>>>> software, does this color shift still happen? >>>>>>>>> >>>>>>>>> allan >>>>>>>>> >>>>>>>>> On Tue, Mar 15, 2016 at 7:37 AM, el-ti <[email protected]> wrote: >>>>>>>>>> The system is using the libsane version from the PPA: >>>>>>>>>> 1.0.26-git20160305-wily0 >>>>>>>>>> >>>>>>>>>> It was installed above the one from Ubuntu’s repositories, when I >>>>>>>>>> added the PPA. >>>>>>>>>> >>>>>>>>>> el-ti >>>>>>>>>> >>>>>>>>>> Am 15.03.2016 um 12:22 schrieb m. allan noah: >>>>>>>>>>> You have installed both sane-backends, and canon's driver? Which one >>>>>>>>>>> are you using? Assuming you are actually using sane-backends, we >>>>>>>>>>> will >>>>>>>>>>> have to modify the code to control the color descrambling. >>>>>>>>>>> >>>>>>>>>>> allan >>>>>>>>>>> >>>>>>>>>>> On Tue, Mar 15, 2016 at 6:08 AM, el-ti <[email protected]> wrote: >>>>>>>>>>>> Hello, >>>>>>>>>>>> >>>>>>>>>>>> I have an appendix to make – maybe someone has a hint for me, why >>>>>>>>>>>> the >>>>>>>>>>>> scanner behaves really strange: >>>>>>>>>>>> >>>>>>>>>>>> Depending on the scanning resolution, the shifting on the color >>>>>>>>>>>> range is >>>>>>>>>>>> different! I used the following command to test this: >>>>>>>>>>>> >>>>>>>>>>>> scanimage --batch --source "ADF Duplex" --page-width 210 >>>>>>>>>>>> --page-height=297 -l 0 -t 0 -x 210 -y 297 --mode Color >>>>>>>>>>>> --resolution 300 >>>>>>>>>>>> >>>>>>>>>>>> Then I tried all available resolutions: 100, 150, 200, 240, 300, >>>>>>>>>>>> 400, >>>>>>>>>>>> 600. The results are strange: >>>>>>>>>>>> >>>>>>>>>>>> Scanning with 100,150,200 gives me: >>>>>>>>>>>> Blue -> Red >>>>>>>>>>>> Red -> Green >>>>>>>>>>>> Green -> Blue >>>>>>>>>>>> >>>>>>>>>>>> Scanning with 300 and 400 gives me: >>>>>>>>>>>> Blue -> Green >>>>>>>>>>>> Green -> Red >>>>>>>>>>>> Red -> Blue >>>>>>>>>>>> >>>>>>>>>>>> And scanning with 240 and 600 shows the RIGHT colors. >>>>>>>>>>>> >>>>>>>>>>>> How is that possible? And how can this problem be solved? >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> I installed Rolf Bensch’s PPA >>>>>>>>>>>> (https://launchpad.net/~rolfbensch/+archive/ubuntu/sane-git), >>>>>>>>>>>> because it >>>>>>>>>>>> solved the back page cutting problem when scanning Duplex. (see >>>>>>>>>>>> http://permalink.gmane.org/gmane.comp.graphics.scanning.sane.devel/24903) >>>>>>>>>>>> >>>>>>>>>>>> Other than that, I only installed the Canon "DR-C125 Driver for >>>>>>>>>>>> Linux >>>>>>>>>>>> V1.0 (v1.0)". >>>>>>>>>>>> >>>>>>>>>>>> Any hint is appreciated! >>>>>>>>>>>> el-ti >>>>>>>>>>>> >>>>>>>>>>>> Am 04.03.2016 um 10:59 schrieb el-ti: >>>>>>>>>>>>> Dear Sane-developers and users, >>>>>>>>>>>>> >>>>>>>>>>>>> through this very helpful discussion >>>>>>>>>>>>> (http://permalink.gmane.org/gmane.comp.graphics.scanning.sane.devel/24903), >>>>>>>>>>>>> I managed to get my Canon Scanner working in Duplex without >>>>>>>>>>>>> cutting 1 cm >>>>>>>>>>>>> of the back page. >>>>>>>>>>>>> >>>>>>>>>>>>> Everything seems to work fine. However, I discovered a very >>>>>>>>>>>>> strange >>>>>>>>>>>>> behaviour regarding the colour management: When scanning in >>>>>>>>>>>>> simplex >>>>>>>>>>>>> mode, everything works fine. There is no page cutting and colours >>>>>>>>>>>>> are as >>>>>>>>>>>>> they should be. But in duplex mode, the colours are somehow >>>>>>>>>>>>> shifted on >>>>>>>>>>>>> the colour range: Blue is scanned as green, green is scanned as >>>>>>>>>>>>> red, red >>>>>>>>>>>>> is scanned as blue (for both back and front page). >>>>>>>>>>>>> >>>>>>>>>>>>> Is there an easy solution for this? Or did I forget to install >>>>>>>>>>>>> something? >>>>>>>>>>>>> >>>>>>>>>>>>> Thank you very much! >>>>>>>>>>>>> el-ti >>>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> -- >>>>>>>>>>>> sane-devel mailing list: [email protected] >>>>>>>>>>>> http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel >>>>>>>>>>>> Unsubscribe: Send mail with subject "unsubscribe your_password" >>>>>>>>>>>> to [email protected] >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> "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: [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject "unsubscribe your_password" to [email protected]
