[sane-devel] pixma backend: -x/y auto advertised but not available / how to crop?

[Manuel Reiter]

Nobody? I found this old discussion which seems to suggest the pixma devices don't support auto-detection:

http://lists.alioth.debian.org/pipermail/sane-devel/2009-December/025674.html

If that's indeed the case, may I suggest updating the pixma backend so that it doesn't advertise capabilities that don't exist?

Also, I'd still appreciate suggestion for a scriptable approach to achieve this functionality.

Thanks,

  Manuel

Am 11.04.2017 um 16:44 schrieb Manuel Reiter:

> I'm using saned with a Pixma MP610 all-in-one on a Raspberry Pi 3 running an up-to-date Rasbian Jessie. scanimage --help shows me the following options for Geometry:
> 
> [...]
> Options specific to device `net:localhost:pixma:04A91725_414EE7':
> [...]
>  Geometry:
>    -l auto|0..216.069mm [0]
>        Top-left x position of scan area.
>    -t auto|0..297.011mm [0]
>        Top-left y position of scan area.
>    -x auto|0..216.069mm [216.069]
>        Width of scan-area.
>    -y auto|0..297.011mm [297.011]
>        Height of scan-area.
> [...]
> 
> However, trying to actually use "-x auto" results in an error:
> 
> ------snip
> reiter at hive:~ $ scanimage -d net:localhost:pixma --mode Color \
> --resolution 300 -l auto -t auto -x auto -y auto > /dev/null
> scanimage: option --x: bad option value (rest of option: auto)
> ------snip
> 
> Is this a bug or an error on my part?
> 
> I intend to use this scanner for a document management system and expect to scan quite a number of non-full-size documents. If x/y auto is indeed not available, what would be a good way to automatically crop my scans? The included (Mac) Software actually does a decent job so it seems to be possible.
> 
> Thanks in advance for your answers!
> 
> Cheers,
> 
>  Manuel
> 
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