[sane-devel] Epson V700 Scan resolution max 3200 ?

Olaf Meeuwissen olaf.meeuwissen at avasys.jp
Thu Dec 21 00:40:49 CET 2006

saz at flitspopper.nl writes:

> Hi,
> I bought an Epson Perfection V700, it worked out of the box with Sane.
> However there are some issues to which I can't find an answer.
> The scanner should be capable of scanning at 4800dpi and 6400dpi, the
> maximum resolution supported by sane is 3200dpi.

Correct.  I think you should even be able to scan at 12800dpi but that
may only be for the secondary scan direction (the long edge), so that
gives 6400x12800dpi.

> scanimage reports:
> Options specific to device `epkowa:libusb:001:007'
> <cut>...
> --resolution 50..3200dpi [300]
>         Sets the resolution of the scanned image
> <cut>...
> Is this a bug or is there a technical reason why this is the maximum
> resolution?

I don't like saying this but this is an arbitrary limitation of the
epkowa backend (and the iscan frontend).  By the way, the fact that
you can't set primary and secondary scan resolution independently is
another arbitrary limitation.

I haven't tried this, but maybe Allessandro's revamped epson2 backend
just might support it.

Hope this helps,
Olaf Meeuwissen                          EPSON AVASYS Corporation, SE1
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