I just committed dynamic thresholding to git.
1 bit B/W scans can be controlled by following options:
- threshold
- threshold-curve
- gamma
Dynamic thresholding uses a look up table of thresholds. The table is
generated for each scan from the parameters threshold-curve as slope and
threshold as
Am 09.02.2012 01:30, schrieb ibu ? radempa ?:
> The patch works and I've sent further logs to Rolf off-list. ibu
>
I just pushed the patch to git.
Many thanks to ibu for testing.
Cheers,
Rolf
ibu ? radempa ? wrote:
>> I guess pixma_binarize_line was not called before.
>
> Please find new logs, again from a fresh clone with your patches,
> attached. Still only part of the area is scanned in lineart mode, bith
> for flatbed and ADF.
Just for record: I made a mistake and forgot to 'make
Dated 2012-02-08 10:02, Rolf Bensch said:
> Am 07.02.2012 11:18, schrieb ibu ? radempa ?:
>> Attached you find both. The command lines are included on top of the log
>> files; I used 300dpi for flatbed and 75dpi for ADF. (After scanning
>> lineart with ADF the paper got stuck, of course, and I had
Am 07.02.2012 11:18, schrieb ibu ? radempa ?:
> Attached you find both. The command lines are included on top of the log
> files; I used 300dpi for flatbed and 75dpi for ADF. (After scanning
> lineart with ADF the paper got stuck, of course, and I had to reboot the
> device - which is a pre-existin
Dated 2012-02-07 10:30, Rolf Bensch said:
>>> There seems to be a problem somewhere around post_process_image_data in
>>> pixma_mp150.c. Please use the attached patch to generate log files of
>>> gray and lineart scans. Please send them packed to avoid an unreadable
>>> ML archive.
>>
>> Attached.
Am 06.02.2012 17:52, schrieb ibu ? radempa ?:
>
> Thanks! There is a small typo however in your commit:
>
> DEVICE ("Canon PIXMA MX360", "MX360", MX350_PID, 1200, 0, 0, 638, 1050,
> PIXMA_CAP_CIS | PIXMA_CAP_ADF),
>
> should read
>
> DEVICE ("Canon PIXMA MX360", "MX360", MX360_PID, 1200, 0, 0, 638,
Hello Ibu,
>
> Hello Rolf,
>
> thanks for the patch. I've tried it with a scanner in the pixma_mp150
> series, Canon MX360, which is however not yet added to pixma_mp150.c,
> and I'm therefore using this patch:
Did you patch your sources or did you fetch the latest version from git?
>
> $ diff
Rolf Bensch wrote:
> I just commited 1 bit B/W lineart for all scanners in the pixma_mp150
> and pixma_mp810 subdrivers to the git tree.
>
> Due to the fact that these ccd scanners doesn't support generic lineart,
> I implemented software-lineart. The graphic frontend (Xsane) provides a
> slider t
Hi Allan,
I still reused the code from the genesys backend. But without a capable
genesys or epjitsu scanner I took the code snippets I understood.
Please give me a short summary about the missing parts. Especially of
the needed interface parameters and the frontend usage e.g. xsane.
Many than
Hi,
Am 03.02.2012 23:35, schrieb ?l ??gn?r:
> Am Fr, 03 Feb 2012 22:31:51 CET schrieb Rolf Bensch:
>
> Hi,
>
>> I just commited 1 bit B/W lineart for all scanners in the pixma_mp150
>> and pixma_mp810 subdrivers to the git tree.
>
> Great, I remember, that Gernot told me, he might code these too s
Am Fr, 03 Feb 2012 22:31:51 CET schrieb Rolf Bensch:
Hi,
> I just commited 1 bit B/W lineart for all scanners in the pixma_mp150
> and pixma_mp810 subdrivers to the git tree.
Great, I remember, that Gernot told me, he might code these too some
day for the 9000F. So maybe you can talk about this
Hello,
I just commited 1 bit B/W lineart for all scanners in the pixma_mp150
and pixma_mp810 subdrivers to the git tree.
Due to the fact that these ccd scanners doesn't support generic lineart,
I implemented software-lineart. The graphic frontend (Xsane) provides a
slider to set the threshold.
Cool. You might also want to look at the dynamic thresholding code I
added to the epjitsu backend. Stef was able to copy it to genesys as
well. Basically adds a sliding window and some hysteresis to the
threshold determination, brings out text on gray backgrounds and such.
I'd like to add it to san
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