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<!-- name="Henning Meier-Geinitz" -->
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<!-- subject="Performance mustek 600 II N" -->
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<title>sane-devel: Performance mustek 600 II N</title>
<h1>Performance mustek 600 II N</h1>
<b>Henning Meier-Geinitz</b> (<a href="mailto:henningmg@gmx.de"><i>henningmg@gmx.de</i></a>)<br>
<i>Mon, 13 Apr 1998 22:26:26 +0200</i>
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I did some tests with the mustek 600 II N scanner, sane 0.72 and<br>
Windows. A page was scanned with a geometry of 22 X 10 cm. I used<br>
Gimp/Xscanimage on Linux and the supplied driver and painting program<br>
with Windows 95. The time is measured between pressing the "scan"<br>
button and displaying the picture [in seconds].<br>
<p>
"buffer" ist the buffer size in kB used in mustek.c (reader_process).<br>
<p>
sane windows<br>
color buffer: 32 buffer: 256<br>
<p>
100 dpi 18 18 21<br>
200 dpi 31 34 36<br>
300 dpi 48 48 53<br>
<p>
grayscale<br>
<p>
100 dpi 11 11 13<br>
200 dpi 18 12 13<br>
300 dpi 40 26 19<br>
<p>
lineart<br>
<p>
100 dpi 10 10 11<br>
200 dpi 12 11 12<br>
300 dpi 15 13 13<br>
600 dpi 42 41 24<br>
<p>
A buffesize bigger then 256 kB doesn't change anything. A bigger<br>
buffer reduces backtracking in grayscale and therefor reduces scanning<br>
time.<br>
<p>
Windows is faster with higher resolutions in grayscale and lineart<br>
mode, it nearly doesn't backtrack there. It seems to be very fast at<br>
reading data from the scanner, perhaps that part can be optimized in<br>
sane (sanei_ab306.c/mustek.c). Windows seems to be slower in doing the<br>
line-distance correction.<br>
<p>
However, with linux and sane I can do other things while scanning,<br>
Windows is stuck totally.<br>
<p>
600 dpi in grayscale and color doesnt't work here with sane correctly,<br>
so I didn't test it.<br>
<p>
Ciao, Henning<br>
<p>
<pre>
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