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<TITLE>sane-devel: snapscan vs. acer 310S</TITLE>
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<META NAME="Author" CONTENT="Russ Burdick (grub@extrapolation.net)">
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<H1>snapscan vs. acer 310S</H1>
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<STRONG>From:</STRONG> Russ Burdick (<A HREF="mailto:grub@extrapolation.net?Subject=Re:%20snapscan%20vs.%20acer%20310S&In-Reply-To=<Pine.LNX.4.21.0006101014300.3743-100000@whitestar>"><EM>grub@extrapolation.net</EM></A>)<BR>
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<STRONG>Date:</STRONG> Sat Jun 10 2000 - 08:42:50 PDT
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<LI><STRONG>Next message:</STRONG> <A HREF="0091.html">Wolfgang Goeller: "Re: snapscan vs. acer 310S"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0091.html">Wolfgang Goeller: "Re: snapscan vs. acer 310S"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0093.html">Steve Underwood: "Re: snapscan vs. acer 310S"</A>
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<P>
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ok, i've finally got a bit of time to play with my scanner again and i've
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<BR>
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been doing some work with my Acer Prisma 310S and the latest snapscan
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<BR>
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backend (snapscan-20000514.tar.gz) and sane-1.0.2.
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<BR>
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<P>from what i've gone through in the source it seem that this scanner has
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<BR>
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the same id (and supposedly behavior) as the VUEGO310S. this brings me to
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<BR>
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my first question for the list: is there anyone out there using a Vuego
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<BR>
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310S that has had success with any version of sane+snapscan? if the vuego
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<BR>
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works and the acer doesnt, perhaps they're not the same inside and it'd be
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<BR>
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worthwhile to start thinking about separating the two in the snapscan
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<BR>
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code.
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<BR>
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<P>back when kevin was still taking care of snapscan and active on this list
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<BR>
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i had a few conversations with him about trying to get snapscan working
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<BR>
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correctly for the acer 310S. at present everything but the very begining
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<BR>
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of a scan is complete garbage, so he had me try doing small scans,
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<BR>
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specifically < 64K. you can see some example of the output here:
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<BR>
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<P><A HREF="http://www.cs.umn.edu/~wburdick/sane/">http://www.cs.umn.edu/~wburdick/sane/</A>
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<BR>
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<P>the first two are color at different resolutions and the last three are
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<BR>
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greyscale. the final image is of a slightly different area on my test
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<BR>
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image since the top of the first one didnt seem all that interesting. this
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<BR>
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is the one i find most interesting. it looks like the first 'block' is
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<BR>
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clear, then the subsequent 'blocks' get more and more garbled. i should
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<BR>
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also note that the resulting pnms (produced by xscanimage) 'appeared to be
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<BR>
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truncated' according to xv, but the greyscale images were fine. i used xv
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<BR>
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to check the images out and to convert them to the above referenced
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<BR>
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pngs. i did all of the above after 'export SANE_DEUBUG_SNAPSCAN=128' and
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<BR>
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the resulting output is also at the above referenced url.
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<BR>
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<P>i thought before jumping into the code too deep i'd see if anyone had any
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<BR>
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thoughts on what i'm seeing. is there something it's doing different on
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<BR>
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the scans after the first one that it shouldnt be? any comments welcome.
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<BR>
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<P>Russ
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<BR>
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<P><PRE>
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--
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-----------------------------------------------------------------
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Russ Burdick + <A HREF="mailto:grub@extrapolation.net?Subject=Re:%20snapscan%20vs.%20acer%20310S&In-Reply-To=<Pine.LNX.4.21.0006101014300.3743-100000@whitestar>">grub@extrapolation.net</A> + <A HREF="http://extrapolation.net/">http://extrapolation.net/</A>
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"What do the good know...except what the bad teach them by their
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excesses?" - Clive Barker
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<P><P><P><P><P><P>--
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Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20snapscan%20vs.%20acer%20310S&In-Reply-To=<Pine.LNX.4.21.0006101014300.3743-100000@whitestar>">majordomo@mostang.com</A>
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</PRE>
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<LI><STRONG>Next message:</STRONG> <A HREF="0091.html">Wolfgang Goeller: "Re: snapscan vs. acer 310S"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0091.html">Wolfgang Goeller: "Re: snapscan vs. acer 310S"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0093.html">Steve Underwood: "Re: snapscan vs. acer 310S"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0106.html">Jouke Hylkema: "Re: snapscan vs. acer 310S"</A>
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: <EM>Sat Jun 10 2000 - 08:44:54 PDT</EM>
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