sane-project-website/old-archive/1998-11/0139.html

<!-- received="Tue Nov 17 13:55:59 1998 PST" -->
<!-- sent="Tue, 17 Nov 1998 16:39:09 EST" -->
<!-- name="Pkirchg@aol.com" -->
<!-- email="Pkirchg@aol.com" -->
<!-- subject="Re: HP C6270 works with scan-hp" -->
<!-- id="" -->
<!-- inreplyto="HP C6270 works with scan-hp" -->
<title>sane-devel: Re: HP C6270 works with scan-hp</title>
<h1>Re: HP C6270 works with scan-hp</h1>
<a href="mailto:Pkirchg@aol.com"><i>Pkirchg@aol.com</i></a><br>
<i>Tue, 17 Nov 1998 16:39:09 EST</i>
<p>
<ul>
<li> <b>Messages sorted by:</b> <a href="date.html#139">[ date ]</a><a href="index.html#139">[ thread ]</a><a href="subject.html#139">[ subject ]</a><a href="author.html#139">[ author ]</a>
<!-- next="start" -->
<li> <b>Next message:</b> <a href="0140.html">Danilo Godec: "Re: Mustek Parallel?"</a>
<li> <b>Previous message:</b> <a href="0138.html">Jeff DeFouw: "Re: Mustek III EP scanners"</a>
<li> <b>In reply to:</b> <a href="0112.html">: ""</a>
<!-- nextthread="start" -->
<li> <b>Next in thread:</b> <a href="0224.html">David Mosberger-Tang: "Re: Too many options for xscanimage"</a>
<!-- reply="end" -->
</ul>
<!-- body="start" -->
<i>&gt; Hi,</i><br>
<i>&gt; </i><br>
<i>&gt; My HP C6270A works with scan-hp driver.</i><br>
<i>&gt; However, there are a couple of problems I noticed:</i><br>
<i>&gt; </i><br>
<i>&gt; 	1.  The first time I ran the "xscanimage" it took five minutes</i><br>
<i>&gt; 	    each time I scanned a page. ...</i><br>
<i>&gt; 	    Later I figured out why: My home directory is NFS mounted, ...</i><br>
<i>&gt; 	    Documenting this "feature" should be sufficient.</i><br>
<p>
Hi,<br>
<p>
there are several things about the home-directory<br>
(see manual page for xscanimage):<br>
SANE creates a .sane-directory<br>
xscanimage creates a .sane/xscanimage directory<br>
hp-backend tries to find a file in the .sane-directory<br>
<p>
<i>&gt; </i><br>
<i>&gt; 	2.  The quality I get is random.  The first time I used it</i><br>
<i>&gt; 	    I was getting all sorts of gray "dirt" like I had smired</i><br>
<i>&gt; 	    ink on the page.  The next time (after a reboot) I kept</i><br>
<i>&gt; 	    getting rainbows across the page, or dark bands in grey</i><br>
<i>&gt; 	    mode.  After a third reboot, I began getting nearly perfect</i><br>
<i>&gt; 	    scans.</i><br>
<i>&gt; </i><br>
<i>&gt; 	    Solution:  If this is a bug in the software, then the</i><br>
<i>&gt; 	    best solution is to fix it.</i><br>
<p>
I am not quite sure what the problem is. Maybe its a problem of the software,<br>
maybe the scanner does not return enough data. But in that case I would<br>
expect to get an error code from the read-routine.<br>
<p>
<i>&gt;           If this is a problem with</i><br>
<i>&gt; 	    the scanner, then there needs to be a way to reset the</i><br>
<i>&gt; 	    scanner other than rebooting my machine. ...</i><br>
<p>
The first command that is send to the scanner is a Reset.<br>
<p>
<i>&gt; 	    the scanner...  I also tried just unplugging the scanner,</i><br>
<i>&gt; 	    but then I can't access the scanner at all until I reboot.</i><br>
<p>
On my Linux machine I can switch off and on the scanner (a HP photosmart)<br>
and with the second restart of xscanimage it gets the scanner.<br>
<p>
<i>&gt; </i><br>
<i>&gt; 	3.  If there is paper in the auto document feeder when I start</i><br>
<i>&gt; 	    the "xscanimage" program for the first time, it decides my</i><br>
<i>&gt; 	    pages have zero lines.  (This makes for very fast scans of</i><br>
<i>&gt; 	    zero size files...)</i><br>
<p>
I have to look how HP wants the ADF to be handled. Up to now there is no<br>
special support for the ADF. From another user I have heard, that it works<br>
if the ADF is empty when starting xscanimage.<br>
<p>
<p>
<i>&gt; </i><br>
<i>&gt; 	4.  Is there a way to specify an output program?  e.g.</i><br>
<i>&gt; </i><br>
<i>&gt; 		|cjpeg -q 100 &amp;gt; foo.jpg</i><br>
<i>&gt; </i><br>
<i>&gt;             as the output program?  ...</i><br>
<p>
That should be handled by the frontend. I think some e-mails ago<br>
there was an attemp for adding filters.<br>
<p>
<i>&gt; </i><br>
<i>&gt; 	5.  Is there a way to tell the program to scan all the pages</i><br>
<i>&gt; 	    in the document feeder?</i><br>
<i>&gt; </i><br>
<p>
Currently not. In this case we also should have an<br>
automatic numbering of output files like out%d.pnm .<br>
<p>
<i>&gt; ...</i><br>
<i>&gt; we have no control over.  To do this, I'll probably have to code</i><br>
<i>&gt; things to use the sane.so files directly.  Is there any documentation</i><br>
<i>&gt; for the API interface, or will I just have to study the source</i><br>
<i>&gt; code?</i><br>
<i>&gt; </i><br>
<p>
You can have a look at the file sane-&lt;version&gt;/doc/sane.tex<br>
<p>
<i>&gt; Thanks,</i><br>
<i>&gt; </i><br>
<i>&gt; 			Bill</i><br>
<p>
Sincerely<br>
<p>
Peter<br>
<p>
<pre>
--
Source code, list archive, and docs: <a href="http://www.mostang.com/sane/">http://www.mostang.com/sane/</a>
To unsubscribe: echo unsubscribe sane-devel | mail <a href="mailto:majordomo@mostang.com">majordomo@mostang.com</a>
</pre>
<!-- body="end" -->
<p>
<ul>
<!-- next="start" -->
<li> <b>Next message:</b> <a href="0140.html">Danilo Godec: "Re: Mustek Parallel?"</a>
<li> <b>Previous message:</b> <a href="0138.html">Jeff DeFouw: "Re: Mustek III EP scanners"</a>
<li> <b>In reply to:</b> <a href="0112.html">: ""</a>
<!-- nextthread="start" -->
<li> <b>Next in thread:</b> <a href="0224.html">David Mosberger-Tang: "Re: Too many options for xscanimage"</a>
<!-- reply="end" -->
</ul>