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<TITLE>sane-devel: Re: HP C5100A (SCSI PhotoSmart) - image solid black</TITLE>
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<H1>Re: HP C5100A (SCSI PhotoSmart) - image solid black</H1>
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<STRONG>From:</STRONG> Ewald R. de Wit (<A HREF="mailto:erdewit@zonnet.nl?Subject=Re:%20HP%20C5100A%20(SCSI%20PhotoSmart)%20-%20image%20solid%20black&In-Reply-To=&lt;20010201122509.A651@bitterling.LeidenUniv.nl&gt;"><EM>erdewit@zonnet.nl</EM></A>)<BR>
<STRONG>Date:</STRONG> Thu Feb 01 2001 - 03:25:09 PST
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Shamim Mohamed (<A HREF="mailto:shamim@drones.com?Subject=Re:%20HP%20C5100A%20(SCSI%20PhotoSmart)%20-%20image%20solid%20black&In-Reply-To=&lt;20010201122509.A651@bitterling.LeidenUniv.nl&gt;">shamim@drones.com</A>) wrote:
<BR>
<P><EM>&gt; The PhotoSmart, however: trying to scan a slide, everything seems to be
</EM><BR>
<EM>&gt; working fine EXCEPT: the image I get from xscanimage is just solid
</EM><BR>
<EM>&gt; black.
</EM><BR>
<P>Is the slide perhaps a bit underexposed (or dark) to begin with?
<BR>
You can try setting the option &quot;Exposure Time&quot; to 300%, and then
<BR>
afterwards apply a gamma of &gt; 2.
<BR>
<P><EM>&gt; What's going on? Do I need to calibrate the 5100A? There is a
</EM><BR>
<EM>&gt; calibration card that came with the scanner but none of the
</EM><BR>
<EM>&gt; documentation I've found on the HP backend says anything about
</EM><BR>
<EM>&gt; calibration.
</EM><BR>
<P>For prints you have to calibrate with the white card (the calibration
<BR>
is stored on file so you have to do this only once). For slides
<BR>
and negatives the scanner will recalibrate itself everytime the media
<BR>
type is changed or when the scanner is opened.
<BR>
&nbsp;&nbsp;
<BR>
<EM>&gt; I tried scanning a print: very dark, faint blue image could be observed.
</EM><BR>
<EM>&gt; However scanning a strip of negatives looks much better.
</EM><BR>
<P>Try recalibrating. To see the recalibrate option in xscanimage, the
<BR>
selected media must be &quot;Print&quot;.
<BR>
<P><PRE>
--
-- Ewald
<P><P><P>--
Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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