[sane-devel] PIXMA: 1 Bit B/W Lineart for pixma_mp150 and pixma_mp810 Subdrivers

Rolf Bensch rolf at bensch-online.de
Sat Feb 4 14:06:06 UTC 2012

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 thanks,

Am 03.02.2012 22:40, schrieb m. allan noah:
> 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 sanei_magic someday, but don't have the time
> right now.
> allan
> On Fri, Feb 3, 2012 at 4:31 PM, Rolf Bensch<rolf at bensch-online.de>  wrote:
>> 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.
>> pixma_mp810 subdriver has been tested well with these scanners:
>> Canoscan 8800F
>> Canoscan 9000F
>> Canon Pixma MP810
>> Canon Pixma MP960
>> pixma_mp150 subdriver isn't tested yet. This code should run, because it is
>> similar to the pixma_mp810 code and I compared the diff files.
>> Please report other working scanners to the ML.
>> Cheers,
>> Rolf
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