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<H1>snapscan, problem in color mode : horizontal shift</H1>
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<STRONG>From:</STRONG> <A HREF="mailto:edrusb@free.fr?Subject=Re:%20snapscan,%20problem%20in%20color%20mode%20:%20horizontal%20shift&In-Reply-To=&lt;979077663.3a5b8a1fd492a@imp.free.fr&gt;"><EM>edrusb@free.fr</EM></A><BR>
<STRONG>Date:</STRONG> Tue Jan 09 2001 - 14:01:03 PST
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Hi all,
<BR>
<P>I own an AGFA snapscan 310, which works fine under windows. It works also fine
<BR>
under Linux using SANE but only in LineArt and GreyScale. In color mode, I get
<BR>
an horizontal shift. After let's 30 perfectly scanned lines, (even without
<BR>
chroma offset), the next 30 lines are shifted right by around 30 dot, also
<BR>
appreas some chroma offset, and so on, periodically I get a block of lines
<BR>
without chroma offset, but still shifted right compared to the previous
<BR>
30-lines-group of scanned lines.
<BR>
<P>I couldn't find any faq, or mail in the archive of this mailing-list, or even
<BR>
documentation about this behaviour. I've compiled and installed without any
<BR>
problem the 1.0.4 backend and frontend packages. Maybe I did something in the
<BR>
wrong way ?
<BR>
<P>By the way, the size of the group of line depends on the width of the image,
<BR>
(larger image get smaller group of line), as well of the resolution, (at 75 dpi,
<BR>
I can get a reasonable size image without distortion, which is not true at 300
<BR>
dpi). It makes me think about a memory (buffer) size problem ? But I'm not an
<BR>
expert at all ... this is just a suggestions, in the case it can help understand
<BR>
what is the problem.
<BR>
<P>Thank you for any help.
<BR>
<P>Edrusb Dalton.
<BR>
<P><P><PRE>
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