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<H1>Re: Phantom 636cx and microtek2</H1>
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<STRONG>From:</STRONG> Levente NOVAK (<A HREF="mailto:novak@jaguar.dote.hu?Subject=Re:%20Phantom%20636cx%20and%20microtek2&In-Reply-To=&lt;947382743.0008@hypermail.dummy&gt;"><EM>novak@jaguar.dote.hu</EM></A>)<BR>
<STRONG>Date:</STRONG> Tue Jan 04 2000 - 00:27:47 PST
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Hi,
<BR>
<P>On Sun, 2 Jan 2000, Bernd Schroeder wrote:
<BR>
<P><EM>&gt;
</EM><BR>
<EM>&gt; &gt; Finally, I discovered that while mirroring is solved for the
</EM><BR>
<EM>&gt; &gt; scanned image and the previews, there is a little problem
</EM><BR>
<EM>&gt; &gt; remaining: if the area to scan is at the upper left part of the
</EM><BR>
<EM>&gt; &gt; scanner's window, I have to mark the upper right part to have the
</EM><BR>
<EM>&gt; &gt; desired area scanned! So the selected area in xsane or xscanimage
</EM><BR>
<EM>&gt; &gt; is still mirrored while the image itself is not anymore. I
</EM><BR>
<EM>&gt; &gt; suppose the upper-left and lower-right coordinates which delimit
</EM><BR>
<EM>&gt; &gt; this area are not recalculated by the backend while the image and
</EM><BR>
<EM>&gt; &gt; the preview are mirrored.
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; Looks as if this scanning direction 'right to left' has more implications
</EM><BR>
<EM>&gt; than its looks at first sight. I have uploaded a new version of the
</EM><BR>
<EM>&gt; backend to
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; <A HREF="ftp://ftp.muc.de/people/bernds/mtek2/microtek2-pre0.9.020100.tar.gz">ftp://ftp.muc.de/people/bernds/mtek2/microtek2-pre0.9.020100.tar.gz</A> ,
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; which should at least fix this problem.
</EM><BR>
<EM>&gt;
</EM><BR>
<P>I have tested the new backend, here is the report:
<BR>
<P>- mirroring is now OK even in the preview window
<BR>
<P>- when backend-calibration is on, there are still crashes. I discovered
<BR>
&nbsp;&nbsp;that these always occur if there was no preview scan with backend-
<BR>
&nbsp;&nbsp;calibration on, while (most of the time) there is no crash when I do
<BR>
&nbsp;&nbsp;a preview scan with calib on. I did not test the previous version
<BR>
&nbsp;&nbsp;(0.8), but I suppose it had to have the same behaviour.
<BR>
<P>- now something surprising: images scanned with calibration are
<BR>
&nbsp;&nbsp;worse than those scanned without, as they have a strong blue tint!
<BR>
&nbsp;&nbsp;Effectively, scanning a white sheet of paper and looking at the
<BR>
&nbsp;&nbsp;histograms shows that while R and G histograms are very close to
<BR>
&nbsp;&nbsp;each other, the blue histogram is markedly shifted towards brighter
<BR>
&nbsp;&nbsp;intensities. Without backend-calibration, the left-to-right order
<BR>
&nbsp;&nbsp;of the three histograms is different, but clearly there is no such
<BR>
&nbsp;&nbsp;a shift in respect to blue channel. I haven't had time to retest
<BR>
&nbsp;&nbsp;with previous backend release, but do not remember having a
<BR>
&nbsp;&nbsp;similar result with it. Did you change something inbetween?
<BR>
<P>Finally, I am very interested to know how did you trace the commands sent
<BR>
by the twain driver with scantest.exe? If I could do the same, maybe it
<BR>
would be easier to find what is the trick of the driver under Windows.
<BR>
Unfortunately, I was unable to get my scanner recognised with recent
<BR>
releases of WINE, while the version shipped with Debian Slink (2.1) did
<BR>
the job, but then scanimage.exe crashed right after. Maybe it is important
<BR>
to mention that I used Windows 3.1 (and the 16 bit version of the drivers
<BR>
and executables).
<BR>
<P>Levente
<BR>
<P><P><P><P><PRE>
--
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