[sane-devel] Epson V500 Gray negative scan problem
olaf.meeuwissen at avasys.jp
Tue Apr 24 02:55:51 UTC 2012
Drasko DRASKOVIC <drasko.draskovic at gmail.com> writes:
> On Mon, Apr 23, 2012 at 12:20 PM, Drasko DRASKOVIC
> <drasko.draskovic at gmail.com> wrote:
>> Hi all,
>> I am trying to set up my Epson V500 to scan correctly B&W negatives with XSane.
>> I am using Epson Avasys driver (epkowa backend), and with iscan !
>> negative scan seem to be working very well.
>> However, when I am trying to obtain scan in XSane, scanned quality is
>> really bad. It looks like it has really bad resolution or bitdepth.
>> It might be due to some settings, because when I put Scanmode to
>> "color" (although I have B&W film negatives), results are with much
>> better resolution, but then I just can not turn result in Gray - it
>> rests orange...
>> What is the process of Black and White negative scan, are there some
>> options that I am missing ?
> Hi all,
> after some research I can see that this can be similar problem to this
> one reported long time ago :
Wow! That's a way-back-when post by me. I've since gotten a lot more
familiar with iscan and can now confidently say that almost all image
processing with iscan/epkowa is done in the iscan frontend. Conversion
of negatives is definitely done in the frontend.
> Does anybody have idea how this can be resolved ?
> How autoexposure/enhancement can be set-up to be correct and resemble
> to what iscan is doing ?
Apart from using iscan, you cannot.
The image processing module is non-free (with an effectively
undocumented API) so most frontends will not be able to use it.
> Can this be used :
> or these setting should be used only for lineart (i.e. commic scans)
> and not for film negative scans ?
That would give you a black and white (without any gray) image. I don't
think that's what you're after.
Hope this helps,
Olaf Meeuwissen, LPIC-2 FLOSS Engineer -- AVASYS CORPORATION
FSF Associate Member #1962 Help support software freedom
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