ok, i've finally got a bit of time to play with my scanner again and i've
been doing some work with my Acer Prisma 310S and the latest snapscan
backend (snapscan-20000514.tar.gz) and sane-1.0.2.
from what i've gone through in the source it seem that this scanner has
the same id (and supposedly behavior) as the VUEGO310S. this brings me to
my first question for the list: is there anyone out there using a Vuego
310S that has had success with any version of sane+snapscan? if the vuego
works and the acer doesnt, perhaps they're not the same inside and it'd be
worthwhile to start thinking about separating the two in the snapscan
code.
back when kevin was still taking care of snapscan and active on this list
i had a few conversations with him about trying to get snapscan working
correctly for the acer 310S. at present everything but the very begining
of a scan is complete garbage, so he had me try doing small scans,
specifically < 64K. you can see some example of the output here:
http://www.cs.umn.edu/~wburdick/sane/
the first two are color at different resolutions and the last three are
greyscale. the final image is of a slightly different area on my test
image since the top of the first one didnt seem all that interesting. this
is the one i find most interesting. it looks like the first 'block' is
clear, then the subsequent 'blocks' get more and more garbled. i should
also note that the resulting pnms (produced by xscanimage) 'appeared to be
truncated' according to xv, but the greyscale images were fine. i used xv
to check the images out and to convert them to the above referenced
pngs. i did all of the above after 'export SANE_DEUBUG_SNAPSCAN=128' and
the resulting output is also at the above referenced url.
i thought before jumping into the code too deep i'd see if anyone had any
thoughts on what i'm seeing. is there something it's doing different on
the scans after the first one that it shouldnt be? any comments welcome.
Russ
-- ----------------------------------------------------------------- Russ Burdick + grub@extrapolation.net + http://extrapolation.net/ "What do the good know...except what the bad teach them by their excesses?" - Clive Barker-- Source code, list archive, and docs: http://www.mostang.com/sane/ To unsubscribe: echo unsubscribe sane-devel | mail majordomo@mostang.com
This archive was generated by hypermail 2b29 : Sat Jun 10 2000 - 08:44:54 PDT