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<title>sane-devel: Re: Backtracking in color scanning</title>
<h1>Re: Backtracking in color scanning</h1>
<a href="mailto:shendrix@gypsy.atlantic.infi.net"><i>shendrix@gypsy.atlantic.infi.net</i></a><br>
<i>Tue, 02 Sep 97 10:48:00 -0400</i>
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In message &lt;19970901104750.53420@drawbridge.in-berlin.de&gt; <br>
<a href="mailto:woju@keep.in-berlin.de">woju@keep.in-berlin.de</a> (&gt; ) writes:<br>
<p>
<i>&gt; Just calcualte the Data the scanner needs to transfer.</i><br>
<i>&gt; As Far as I could find the Mustek Scanner justs uses async transfer</i><br>
<i>&gt; to the HOST which could be as slow as 1.5MB/S (even if you Adapter</i><br>
<i>&gt; could get up to 7MB/s )</i><br>
<i>&gt; An tiny Area of 1" times 1" brings you with 24 Bit and 1200 dpi Color</i><br>
<i>&gt; into 4320000 Bytes of Imagedata. if the scanner is able to scan that within</i><br>
<i>&gt; 1 Second the scanner needs to stop to get rid of the</i><br>
<i>&gt; Data.</i><br>
<p>
Well, under Windows95 it usually never did backtracking. When it did,<br>
it only backed up half the number of times it does with sane. This<br>
was with the little cheap controller it came with too.<br>
<p>
There had got to be a way to get it as fast as under Windows. My scanner<br>
is backtracking every half inch sometimes. Under Win95 it always moved at<br>
least a couple of inches before backtracking.<br>
<p>
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