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<TITLE>sane-devel: Re: Snapscan backend</TITLE>
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<META NAME="Author" CONTENT="Steve Underwood (steveu@coppice.org)">
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<META NAME="Subject" CONTENT="Re: Snapscan backend">
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<H1>Re: Snapscan backend</H1>
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<!-- received="Sun May 14 05:24:21 2000" -->
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<!-- sent="Sun, 14 May 2000 20:28:14 +0800" -->
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<!-- name="Steve Underwood" -->
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<!-- subject="Re: Snapscan backend" -->
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<!-- id="391E9BDE.46F99909@coppice.org" -->
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<!-- inreplyto="391E62BE.5401113F@sitebysite.nl" -->
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<STRONG>From:</STRONG> Steve Underwood (<A HREF="mailto:steveu@coppice.org?Subject=Re:%20Snapscan%20backend&In-Reply-To=<391E9BDE.46F99909@coppice.org>"><EM>steveu@coppice.org</EM></A>)<BR>
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<STRONG>Date:</STRONG> Sun May 14 2000 - 05:28:14 PDT
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<P>
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<LI><STRONG>Next message:</STRONG> <A HREF="0102.html">Louis van Dompselaar: "Re: Snapscan backend"</A>
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<UL>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0100.html">Petter Reinholdtsen: "Sane BeOS port (Was: Sane port)"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0098.html">Louis van Dompselaar: "Re: Snapscan backend"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0102.html">Louis van Dompselaar: "Re: Snapscan backend"</A>
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<P>
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Hi,
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<BR>
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<P>The chroma offsets are just one issue here, it seems. At 100dpi a 2540
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<BR>
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pixel line would be 25.4inches - somewhat wider than the actual scanner.
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<BR>
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The scan is also (apparently) 34.29inches long, and monochrome, since the
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<BR>
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number of bytes and pixels per line is equal. In other words this data
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<BR>
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looks seriously screwed up. I'll take a look at older version of the driver
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<BR>
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and see what I can find. Do you know a revision of driver which worked OK?
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<BR>
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<P>Steve
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<BR>
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<P><P>Louis van Dompselaar wrote:
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<BR>
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<P><EM>> Here's the debug output for a 100 dpi colour scan on the
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</EM><BR>
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<EM>> Agfa SnapScan 1236 with the new backend. It looks like
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</EM><BR>
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<EM>> the Agfa doesn't return the required colour offsets...
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> [snapscan] inquiry
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</EM><BR>
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<EM>> [snapscan] inquiry: Chroma offsets Red:0, Green:0 Blue:0
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</EM><BR>
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<EM>> [snapscan] inquiry: pixels per scan line = 2540
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</EM><BR>
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<EM>> [snapscan] inquiry: bytes per scan line = 2540
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</EM><BR>
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<EM>> [snapscan] inquiry: number of scan lines = 3429
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</EM><BR>
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<EM>> [snapscan] inquiry: effective buffer size = 30480 bytes, 8 lines
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</EM><BR>
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<EM>> [snapscan] inquiry: expected total scan data: 8709660 bytes
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> --
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</EM><BR>
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<EM>> Louis van Dompselaar <A HREF="mailto:louis@sitebysite.nl?Subject=Re:%20Snapscan%20backend&In-Reply-To=<391E9BDE.46F99909@coppice.org>">louis@sitebysite.nl</A>
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</EM><BR>
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<EM>> Site by Site B.V. Duivendrechtsekade 85, 1096 AJ Amsterdam
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</EM><BR>
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<EM>> Tel: 020 665 7148 fax: 020 665 7279 <A HREF="http://www.sitebysite.nl/">http://www.sitebysite.nl/</A>
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</EM><BR>
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<P><P><PRE>
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--
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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%20backend&In-Reply-To=<391E9BDE.46F99909@coppice.org>">majordomo@mostang.com</A>
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</PRE>
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<!-- next="start" -->
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<LI><STRONG>Next message:</STRONG> <A HREF="0102.html">Louis van Dompselaar: "Re: Snapscan backend"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0100.html">Petter Reinholdtsen: "Sane BeOS port (Was: Sane port)"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0098.html">Louis van Dompselaar: "Re: Snapscan backend"</A>
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<SMALL>
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<EM>
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This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
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: <EM>Sun May 14 2000 - 05:24:45 PDT</EM>
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