<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=iso-8859-1" http-equiv="Content-Type">
<title></title>
</head>
<body bgcolor="#ffffff" text="#000000">
Stef,<br>
<br>
I haven't had a chance to spend any significant amount of time with it.
I'm hoping to get to it in August when I have some vacation time. There
is quite a bit of work yet to do on it.<br>
<br>
I'll start by stubbing out all the calibration routines and just make
sure it still scans as well as the old backend. Next I'll slowly add
back the various calibrations and get them working for X1100 scanners.
The amount of time a scan takes due to backtracking is unacceptable on
some of the scans I tried - we're talking about several minutes to do a
small scan at 150dpi! You thought this was due to the shading
calibration, but I have my doubts. I'll take it out to see if the
performance improves. The calibration scans seem to take a lot of time
as well, but that could be due to the new method for finding home<br>
<br>
Where did you get the calibration algorithms from (gain, offset, and
shading)? Do you know if the algorithms will work for scanners with a
CIS head like the X1100s? Some of the hard coded ranges look "funny"
for my scanner...<br>
<br>
Fred.<br>
<br>
<br>
Stéphane VOLTZ wrote:
<blockquote cite="mid200607270724.52631.stefdev@modulonet.fr"
type="cite">
<pre wrap="">Le mardi 25 juillet 2006 01:00, Fred Odendaal a écrit :
</pre>
<blockquote type="cite">
<pre wrap="">The X1270 is not supported by the X1100 backend. You are somewhat
correct in your assumption of what is happening. The scanner is trying
to find the home position by scanning in the reverse direction - looking
for a set pattern off the glass. If it can't find it, it will make a
loud noise as the scan head bangs against the end. This is bad for your
scanner, so I'd advise against continuing to try it.
regards,
Fred Odendaal
</pre>
</blockquote>
<pre wrap=""><!---->
        Hello Fred,
        by the way, what are your plans regarding the experimental version of the
lexmark backend ? It has the inital groundwork needed for multi-models
support. Also it has some improvements such as calibration and arbitrary scan
size area.
        As far I understood, the blocking point you got was calibration tuning for
your model. Did you have some time to give a look ?
Regards,
        Stef
</pre>
</blockquote>
</body>
</html>