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<TITLE>sane-devel: Re: Transparency support for snapscan backend</TITLE>
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<H1>Re: Transparency support for snapscan backend</H1>
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<STRONG>From:</STRONG> Karlheinz Günster (<A HREF="mailto:karlheinz.guenster@t-online.de?Subject=Re:%20Transparency%20support%20for%20snapscan%20backend&In-Reply-To=&lt;00050513101300.03365@mimoculo&gt;"><EM>karlheinz.guenster@t-online.de</EM></A>)<BR>
<STRONG>Date:</STRONG> Fri May 05 2000 - 00:00:07 PDT
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Am Die, 02 Mai 2000 schrieb Oliver Schwartz:
<BR>
<P>Hi Oliver,
<BR>
<P><EM>&gt; &gt; &gt; I've put a first version of my patch for transparency support in the snapscan
</EM><BR>
<EM>&gt; &gt; &gt; backend on my homepage (<A HREF="http://www.ginko.de/user/oschwartz/snapscan">http://www.ginko.de/user/oschwartz/snapscan</A>).
</EM><BR>
<EM>&gt; &gt; &gt;
</EM><BR>
<EM>&gt; &gt; &gt; Up to now I have only tested it with an Acer ScanPrisa 620UT.
</EM><BR>
<EM>&gt; &gt; &gt;
</EM><BR>
<EM>&gt; &gt; &gt; The patch is for sane-1.0.2. It does not work with previous versions.
</EM><BR>
<EM>&gt; &gt; &gt;
</EM><BR>
<EM>&gt; &gt; &gt; If you have a Snapscan or Acer Prisa scanner with transparency unit please try
</EM><BR>
<EM>&gt; &gt; &gt; it and tell me whether it works for you.
</EM><BR>
<EM>&gt; &gt;
</EM><BR>
<EM>&gt; &gt; it runs! Thank you very much for your work.
</EM><BR>
<EM>&gt; &gt;
</EM><BR>
<EM>&gt; &gt; Only the following appeared:
</EM><BR>
<EM>&gt; &gt;
</EM><BR>
<EM>&gt; &gt; On your homepage in the &quot;installation instructions&quot; under &quot;5.&quot; should
</EM><BR>
<EM>&gt; &gt; only be the instruction &quot;make&quot;, under &quot;6.&quot; &quot;make install&quot;, without dot
</EM><BR>
<EM>&gt; &gt; and slash. This way my system is working correctly.
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; You're right. I've changed it.
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; &gt; I copied &quot;find-scanner&quot; manually, because &quot;make install&quot; and
</EM><BR>
<EM>&gt; &gt; &quot;tools&quot; haven't been installed.
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; That's true. However, it's a general sane problem. I don't know why find-scanner
</EM><BR>
<EM>&gt; is not installed by &quot;make install&quot; (anyone?).
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; &gt; Version 1.0.2 don't overwrite existing files in /usr/local/etc/sane.d
</EM><BR>
<EM>&gt; &gt; and /usr/local/lib/sane. I searched for it a long time, at least
</EM><BR>
<EM>&gt; &gt; found it and then deleted it manually.
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; Hm... It should leave old configuration files in /usr/local/etc/sane.d but
</EM><BR>
<EM>&gt; overwrite binaries in /usr/local/lib/sane. The only reasons I can imagine why
</EM><BR>
<EM>&gt; it didn't work for you is that you had sane 1.0.1 installed. In this case some
</EM><BR>
<EM>&gt; links in /usr/local/lib/sane are not replaced.
</EM><BR>
<P>I had sane 1.0.1 installed.
<BR>
<P>&nbsp;
<BR>
<EM>&gt; &gt; The scan looks very fine.
</EM><BR>
<EM>&gt; &gt;
</EM><BR>
<EM>&gt; &gt; Finally I have three wishes:
</EM><BR>
<EM>&gt; &gt;
</EM><BR>
<EM>&gt; &gt; The scanarea can be 21,5 x 29 cm.
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; Are you sure? I found an electronic version of a Snapscan 300 / 600 manual which
</EM><BR>
<EM>&gt; specifies 203 x 254 mm for transparency mode. I'll add support for
</EM><BR>
<EM>&gt; model-dependent max. scan areas in the next version of the patch.
</EM><BR>
<P>You are right, the TPU covers a smaller area than the base of
<BR>
the scanner. I relate to the largest size that is possible for
<BR>
contact-prints.
<BR>
<P><P><EM>&gt; &gt; A switch that allows me to choice between negative and positive scan.
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; You should use xsane. It already has a &quot;negative&quot; switch.
</EM><BR>
<P>But this doesn't run with the new coolscan-Backend from Andreas
<BR>
Rick, I have a &quot;new&quot; Coolscan.
<BR>
<P><P><EM>&gt; &gt; And a little faster scan only by 600 dpi with maximal scan-area in mode
</EM><BR>
<EM>&gt; &gt; flatbed. A scan with this resolution was running 45 minutes before
</EM><BR>
<EM>&gt; &gt; xscanimage disapeared suddenly, although only half of the image was
</EM><BR>
<EM>&gt; &gt; scanned.
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; Hm again... My scanner works fine with this resolution. Is this a new
</EM><BR>
<EM>&gt; behaviour after applying the patch? Does anybody else have this problem with a
</EM><BR>
<EM>&gt; SnapScan 600? What kind of SCSI-adapter are you using?
</EM><BR>
<P>I found it. If with or without your patch, the result is the same since 1.0.2. My
<BR>
233MHz computer has an Adaptec AHA-2940A SCSI-Controller.
<BR>
<P>A 600dpi-scan in color and 600dpi-scan in greyscale
<BR>
is impossible, because it takes you 10 minutes.
<BR>
<P>But I remember of Kevins Mini-Patch &quot;src-0.8.tgz&quot; from Oct 21, 1999.
<BR>
I copied the files into 1.0.2, and patched it with your
<BR>
snapscantpo.patch. It works normally.
<BR>
<P>Karlheinz
<BR>
<P><PRE>
--
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--
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