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<TITLE>sane-devel: Re: [snapscan] Core testing group</TITLE>
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<META NAME="Author" CONTENT="Sebastien Sable (sebastien.sable@gmx.net)">
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<META NAME="Subject" CONTENT="Re: [snapscan] Core testing group">
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<H1>Re: [snapscan] Core testing group</H1>
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<!-- received="Thu Nov 2 19:58:29 2000" -->
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<!-- sent="03 Nov 2000 04:59:14 +0100" -->
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<!-- name="Sebastien Sable" -->
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<!-- email="sebastien.sable@gmx.net" -->
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<!-- subject="Re: [snapscan] Core testing group" -->
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<!-- id="87zojh4sfh.fsf@gmx.net" -->
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<!-- inreplyto="Wed, 01 Nov 2000 11:08:47 -0500"" -->
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<STRONG>From:</STRONG> Sebastien Sable (<A HREF="mailto:sebastien.sable@gmx.net?Subject=Re:%20[snapscan]%20Core%20testing%20group&In-Reply-To=<87zojh4sfh.fsf@gmx.net>"><EM>sebastien.sable@gmx.net</EM></A>)<BR>
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<STRONG>Date:</STRONG> Thu Nov 02 2000 - 19:59:14 PST
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<LI><STRONG>Next message:</STRONG> <A HREF="0038.html">Dunphy Richard-rdunph01: "RE: Problems with Microtek E3 on Adaptec 1502 SCSI on SuSE Linux."</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0039.html">Steve Underwood: "Re: [snapscan] Core testing group"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0039.html">Steve Underwood: "Re: [snapscan] Core testing group"</A>
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<P>
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<A HREF="mailto:cbagwell@sprynet.com?Subject=Re:%20[snapscan]%20Core%20testing%20group&In-Reply-To=<87zojh4sfh.fsf@gmx.net>">cbagwell@sprynet.com</A> writes:
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<BR>
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<P><EM>> This information is very useful. Do you think we should include it
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</EM><BR>
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<EM>> in the snapscan.desc file somehow?
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</EM><BR>
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<P>I will put it on the web page when it will be ~complete. Some people
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<BR>
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reported other scanners (by mail to me not to the mailing-list). I
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<BR>
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don't have a report for all the models, but at least those that have
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<BR>
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been reported seem to work.
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<BR>
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<P><EM>> Acer 640BU (Not labeled as a Prisa for some reason!)
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</EM><BR>
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<EM>> FlatbedScanner20
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</EM><BR>
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<EM>> Works under 1.0.1, stops halfway through with 1.0.3. Probably fixed
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</EM><BR>
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<EM>> by Sebastien's patches.
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</EM><BR>
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<P>Probably not ;)
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<BR>
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<P>It's a FlatbedScanner20 so from snapscan.h it uses a PRISA620S. I have
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<BR>
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not made changes for this model, you have to look for ACER300F in:
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<BR>
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* snapscan-source.c (if it blocks (stop halfway?)) <--
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<BR>
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* and/or snapscan-scsi.c (if the picture is full of noise)
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<BR>
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* and/or snapscan.c (if the picture has a puzzle problem : many blocks
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<BR>
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of pixels (m<>lang<6E>s?) badly sorted)
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<BR>
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<P>The change is quite obvious (there is a big test for many models -
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<BR>
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ugly but it works (I'd like to change it though) - just add your
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<BR>
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model).
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<BR>
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<P><EM>> Its described as 48-bits on the box but I downloaded the specs for
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</EM><BR>
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<EM>> the scanner chip it uses and it says something about 14 bits only.
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</EM><BR>
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<EM>> I'll get back to you on this stuff. It may be more useful to
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</EM><BR>
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<EM>> describe the scanners dpi not by model names but the actual optical
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</EM><BR>
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<EM>> chip used.
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</EM><BR>
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<P>I though there were only 300dpi and 600dpi. Are there really
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<BR>
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resolutions higher than 600dpi or is it just some kind of
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<BR>
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interpolation?
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<BR>
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<P>I was pretty sure that I could group all scanners in 3 categories to
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<BR>
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simplify the code, and then I realized, that on top of resolution, bus
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<BR>
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and protocol differences, there was a difference between bits per
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<BR>
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color.
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<BR>
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<P>USB/SCSI difference can be easily detected (I looked in epson backend
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<BR>
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to see how they did and we can adapt it - they just put usb in front
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<BR>
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of /dev/usbscanner in their conf file and detect that).
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<BR>
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<P>It would be great if the bits_per_color could be obtained by an
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<BR>
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inquiry, that would not break my pseudo-classification (ok, that's not
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<BR>
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really a good scientific way of proceeding, I'm modifying facts so
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<BR>
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that they fit in my theory, but that would be so much pratical).
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<BR>
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<P><PRE>
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--
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S<EFBFBD>bastien Sabl<62>
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<A HREF="mailto:sebastien.sable@gmx.net?Subject=Re:%20[snapscan]%20Core%20testing%20group&In-Reply-To=<87zojh4sfh.fsf@gmx.net>">sebastien.sable@gmx.net</A>
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<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:%20[snapscan]%20Core%20testing%20group&In-Reply-To=<87zojh4sfh.fsf@gmx.net>">majordomo@mostang.com</A>
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</PRE>
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<LI><STRONG>Next message:</STRONG> <A HREF="0038.html">Dunphy Richard-rdunph01: "RE: Problems with Microtek E3 on Adaptec 1502 SCSI on SuSE Linux."</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0036.html">Sebastien Sable: "Re: [snapscan] Core testing group"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0039.html">Steve Underwood: "Re: [snapscan] Core testing group"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0039.html">Steve Underwood: "Re: [snapscan] Core testing group"</A>
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