sane-project-website/old-archive/1999-07/0189.html

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<title>sane-devel: Re: Document Feeders (was Re: Anyone with a Umax Document Feeder?)</title>
<h1>Re: Document Feeders (was Re: Anyone with a Umax Document Feeder?)</h1>
<b>Oliver Rauch</b> (<a href="mailto:oliver.rauch@Wolfsburg.DE"><i>oliver.rauch@Wolfsburg.DE</i></a>)<br>
<i>Tue, 27 Jul 1999 18:56:15 +0200</i>
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Nick Lamb wrote:<br>
<p>
<i>&gt; Can we reconcile these two approaches into a single mechanism?</i><br>
<p>
Where is the problem when the backend calls "change page"<br>
before starting the scan when scan source is set to "ADF" ?<br>
This does work for all scanners with ADF!<br>
I see no problem with this, because the idea of the ADF is to put in<br>
a lot of papers that shall be copied, faxed or archieved, so the user<br>
selects starts and comes back half an hour later and everything is<br>
finished.<br>
<p>
If you want a user interactive mode, the frontend does not need to<br>
know anything about that because the user does press the buttons.<br>
So if the user shall be able to say "next paper" that is not the idea<br>
of ADF. I suggest to add an other scan source "Manual Document Feeder"<br>
or something like that. But we do not need any well known options for<br>
this because the frontend does not do anything automatically!<br>
<p>
<i>&gt;</i><br>
<i>&gt; Also, Oliver: Does the Umax way give you separate scan data for each</i><br>
<i>&gt; sheet, or does the user/app have to cut it up post-scan?</i><br>
<p>
You get one image per page!<br>
You call SANE_START, the scanner loads the page and scans the selected area.<br>
Second SANE_START produces next image.<br>
<p>
Bye<br>
Oliver<br>
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EMAIL: <a href="mailto:Oliver.Rauch@Wolfsburg.DE">Oliver.Rauch@Wolfsburg.DE</a>
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<li> <b>Next message:</b> <a href="0190.html">Oliver Rauch: "Re: Document Feeders"</a>
<li> <b>Previous message:</b> <a href="0188.html">Andreas Rick: "Re: Document Feeders"</a>
<li> <b>Maybe in reply to:</b> <a href="0182.html">Nick Lamb: "Document Feeders (was Re: Anyone with a Umax Document Feeder?)"</a>
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<li> <b>Next in thread:</b> <a href="0194.html">Oliver Rauch: "Re: Document Feeders (was Re: Anyone with a Umax Document Feeder?)"</a>
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