[sane-devel] microtek2 lineart threshold problem

[m. allan noah]

Change the order of your command line arguments. put lineart first.

On Thu, Nov 3, 2016 at 2:28 PM, Tom Canavan <tmscanavan at centurytel.net> wrote:
> Hello,
> I am a new member and this is my first post.  I wanted to post here before
> filing a bug report to make sure I am not doing something wrong.
>
> I am having trouble using the scanimage command with the microtek2 backend
> trying to control a Microtek V6USL.
>
> The problem is with the "--threshold" option in Lineart mode. I need to be
> able to control the threshold because with some scans the automatic setting of
> the threshold does not work very well when scanning documents that are printed
> over colored backgrounds.  And I need to do it via command line because I am
> writing a dialog script using Yad dialogs.
>
> I know the scanner Lineart threshold can be controlled, because I can do it
> with xsane and it works well.
>
> Here is my /etc/saned/microtek2.conf:
> option dump 1
> #option strip-height 14.0
> /dev/sg5
> option no-backtrack-option on
> option lightlid-35 on
> option toggle-lamp on
> option lineart-autoadjust on
> option backend-calibration on
> #option colorbalance-adjust on
> #scsi * * Scanner
>
> When I try to run a command to scan a document such as:
>
> scanimage -d microtek2:/dev/sg5 -x 250 -y 20 --resolution 200 --threshold 105
> --mode Lineart --format=tiff > $HOME/faxproject/scans/image.tif
>
> I get an error message:  scanimage: attempted to set inactive option threshold
>
> When I run scanimage -A it says that option is indeed inactive.  So I tried
> putting the line:
>
> option threshold on
>
> in my /etc/saned/microtek2.conf file.
> That did not work either.
>
> I then tried putting that line in and also turning off the option lineart-
> autoadjust.  That did not work either.
>
> So I am hoping that someone with more knowledge that I can tell me whether
> this is a bug or not, and if not, then show me how to turn the --threshold
> option on for this backend and this scanner.
> Any help appreciated.  Thank you.
>
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