<div dir="ltr"><div style>Hello,</div><div style><br></div>I enabled the debug traces and scanned an image. The debug log is here:<br><div><a href="http://pastebin.com/XGEE8qUW">http://pastebin.com/XGEE8qUW</a><br></div><div style>
I uploaded the resulting image here:</div><div><a href="https://docs.google.com/file/d/0B1vsOamDoU0IVGJBRjB4NGE0THc/edit?usp=sharing">https://docs.google.com/file/d/0B1vsOamDoU0IVGJBRjB4NGE0THc/edit?usp=sharing</a><br></div>
<div><br></div><div style>I hope it is what you asked for.</div><div style><br></div><div style>Eva</div><div style><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On 11 August 2013 22:28, Stef <span dir="ltr"><<a href="mailto:stef.dev@free.fr" target="_blank">stef.dev@free.fr</a>></span> wrote:<br>
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    <div>On 11/08/2013 18:38, idle wrote:<br>
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      <div dir="ltr">Hello, 
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        <div>thank you for your replies.</div>
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                    <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">This
                      model is listed as 'basic' in sane-backends
                      1.0.22. Try upgrading<br>
                      to at least 1.0.23, or a recent git snapshot.<br>
                      <br>
                      allan<br>
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              <div>I'm trying now with the git snapshot:</div>
              <div>scanimage (sane-backends) 1.0.24git; backend version
                1.0.24<br>
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              <div><br>
              </div>
              <div>Unfortunately, the result is the same.<br>
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              <div> </div>
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                    Hello,<br>
                <br>
                    if updated version doesn't improve the scan quality.
                You may also test if it is related to improper warming
                up by doing several scans. Clearing calibration (with
                the 'clear calibration' option)cache between each scan,
                so a calibration happens each time.<br>
                <br>
                Regards,<br>
                    Stef<br>
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              <div><br>
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              <div>Thank you for the suggestion, I tried a
                series of 10 scans, clearing the calibration after each
                one, and the result is interesting. The first scan of
                the series is visibly lighter than the rest (although
                still too gray), the second and third are each slightly
                darker than the previous one. All the following scans
                are the same as the third. So there is something going
                on. The stripes are still there, though.</div>
              <div><br>
              </div>
              <div>Here are the first three scans:</div>
              <div><a href="http://i.nahraj.to/f/s5o.jpg" target="_blank">http://i.nahraj.to/f/s5o.jpg</a><br>
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              <div><a href="http://i.nahraj.to/f/s5p.jpg" target="_blank">http://i.nahraj.to/f/s5p.jpg</a><br>
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              <div><a href="http://i.nahraj.to/f/s5q.jpg" target="_blank">http://i.nahraj.to/f/s5q.jpg</a><br>
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            Eva</div>
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        Hello,<br>
    <br>
        it seems gain calibration isn't good, resulting in poor shading
    calibration. Could you send the debug log generated when debug
    traces are enabled by:<br>
    export SANE_DEBUG_GENESYS=255<br>
    export SANE_DEBUG_GENESYS_LOW=255<br>
    export SANE_DEBUG_GENESYS_GL646=255<br>
    Some *.pnm debug files will be created, please also send them.<br>
    <br>
    Regards,<br>
        Stef<br>
    <br>
    <br>
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