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<TITLE>sane-devel: Re: Problem with scan quality using UMAX Astra 1220S</TITLE>
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<META NAME="Author" CONTENT="Rod Pike (rodneyp@utanet.at)">
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<META NAME="Subject" CONTENT="Re: Problem with scan quality using UMAX Astra 1220S">
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<H1>Re: Problem with scan quality using UMAX Astra 1220S</H1>
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<!-- received="Sun Nov 5 12:14:12 2000" -->
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<!-- sent="Sun, 5 Nov 2000 21:19:04 -0200" -->
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<!-- name="Rod Pike" -->
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<!-- subject="Re: Problem with scan quality using UMAX Astra 1220S" -->
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<STRONG>From:</STRONG> Rod Pike (<A HREF="mailto:rodneyp@utanet.at?Subject=Re:%20Problem%20with%20scan%20quality%20using%20UMAX%20Astra%201220S&In-Reply-To=<20001105211903.A818@utanet.at>"><EM>rodneyp@utanet.at</EM></A>)<BR>
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<STRONG>Date:</STRONG> Sun Nov 05 2000 - 15:19:04 PST
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<P>
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<!-- next="start" -->
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<LI><STRONG>Next message:</STRONG> <A HREF="0080.html">Henning Meier-Geinitz: "New backends for SANE 1.0.4"</A>
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<UL>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0078.html">Peter Kirchgessner: "Re: SCSI and HP 5P Scanner"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0045.html">Oliver Rauch: "Re: Problem with scan quality using UMAX Astra 1220S"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0082.html">Oliver Rauch: "Re: Problem with scan quality using UMAX Astra 1220S"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0082.html">Oliver Rauch: "Re: Problem with scan quality using UMAX Astra 1220S"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0084.html">Johan Bengtsson: "Re: Problem with scan quality using UMAX Astra 1220S"</A>
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<P>
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On Sat, Nov 04, 2000 at 12:19:12AM +0100, Oliver Rauch wrote:
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<BR>
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<EM>> Rod Pike wrote:
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</EM><BR>
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<EM>> >
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</EM><BR>
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<EM>> > Greetings,
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</EM><BR>
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<EM>> >
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</EM><BR>
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<EM>> > I'm running RH 6.2 and using the supplied version of Gimp and sane-1.0.1-4. I
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</EM><BR>
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<EM>> > have a problem getting output from this combination that comes close to the
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</EM><BR>
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<EM>> > quality of the output I get using the supplied Windows Twain interface (
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</EM><BR>
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<EM>> > VistaScan ) that came with my UMAX Astra 1220S.
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</EM><BR>
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<EM>> >
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</EM><BR>
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<EM>> > The problem is difficult to explain but if you look at these jpegs I think you
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</EM><BR>
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<EM>> > can see what I mean. There is a faint line of pixels on the xscanimage
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</EM><BR>
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<EM>> > captured image and it's hard to see here but the uniformaty of the pixels on
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</EM><BR>
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<EM>> > the vistascan captured image is much smoother than that of xscanimage.
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</EM><BR>
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<EM>> >
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</EM><BR>
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<EM>> > <A HREF="http://www.iosphere.net/~sullivan/rp/sane/vistascan300dpiRGBcrop.jpg">http://www.iosphere.net/~sullivan/rp/sane/vistascan300dpiRGBcrop.jpg</A>
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</EM><BR>
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<EM>> > <A HREF="http://www.iosphere.net/~sullivan/rp/sane/xscanimage300dpiRGBcrop.jpg">http://www.iosphere.net/~sullivan/rp/sane/xscanimage300dpiRGBcrop.jpg</A>
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</EM><BR>
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<EM>> >
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</EM><BR>
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<EM>> > Both images are scanned using the same source at 300 dpi. I've used whatever
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</EM><BR>
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<EM>> > default settings there are with each interface.
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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>> Hi Rod,
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> this looks like a problem of your scsi bus or drivers.
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</EM><BR>
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<EM>>
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</EM><BR>
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snippp >>>>
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<BR>
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<P>Thanks Oliver. I tried a few things assuming is was a SCSI buss/driver problem
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<BR>
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as you suggested. Being a long time SCSI user, I have a few different SCSI
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<BR>
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cards around. The original configuration was using an old Adaptec AHA1542CF.
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<BR>
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I substituted in a newer Adaptec 2940AU and got similar results. I also tried
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<BR>
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an ASUS PCI-SC200 ( 53C810 ) and got the same result. In all instances I tried
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<BR>
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both the scanner as the only device on the BUSS and in addition to other
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<BR>
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devices. Of course I terminated appropriately.
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<BR>
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<P>I then tried using a different computer with RH6.2 and the SC200 and was
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<BR>
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surprised to find that the scan was clean. I'm assuming if I tried the other
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<BR>
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SCSI cards I would get a similar result. So I'm back to where I started
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<BR>
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without a solution ( Using this other computer for scanning is not a solution
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<BR>
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). My current configuration does not work for me and I'm at a loss as to how
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<BR>
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to correct the problem.
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<BR>
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<P>I get clean scans if I use Windows or another machine. I get dirty scans if I
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<BR>
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use sane on this particular machine. I've tried different cards, therefor
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<BR>
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different drivers with the same result. I've tried the same buss arrangement
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<BR>
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on two different computers with different results so it doesn't seem to be buss
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<BR>
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related.
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<BR>
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<P>Any other suggestions on a way to tackle this issue?
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<BR>
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<P>Cheers,
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<BR>
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<P><PRE>
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--
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Rod Pike
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rodneyp @ utanet.at
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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:%20Problem%20with%20scan%20quality%20using%20UMAX%20Astra%201220S&In-Reply-To=<20001105211903.A818@utanet.at>">majordomo@mostang.com</A>
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</PRE>
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<LI><STRONG>Next message:</STRONG> <A HREF="0080.html">Henning Meier-Geinitz: "New backends for SANE 1.0.4"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0078.html">Peter Kirchgessner: "Re: SCSI and HP 5P Scanner"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0045.html">Oliver Rauch: "Re: Problem with scan quality using UMAX Astra 1220S"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0082.html">Oliver Rauch: "Re: Problem with scan quality using UMAX Astra 1220S"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0082.html">Oliver Rauch: "Re: Problem with scan quality using UMAX Astra 1220S"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0084.html">Johan Bengtsson: "Re: Problem with scan quality using UMAX Astra 1220S"</A>
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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 Nov 05 2000 - 12:15:15 PST</EM>
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