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<TITLE>sane-devel: Re: Can thumbnails be included in jpeg images gener</TITLE>
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<META NAME="Author" CONTENT="Nick Lamb (njl98r@ecs.soton.ac.uk)">
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<META NAME="Subject" CONTENT="Re: Can thumbnails be included in jpeg images generated by xsane?">
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<H1>Re: Can thumbnails be included in jpeg images generated by xsane?</H1>
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<STRONG>From:</STRONG> Nick Lamb (<A HREF="mailto:njl98r@ecs.soton.ac.uk?Subject=Re:%20Can%20thumbnails%20be%20included%20in%20jpeg%20images%20generated%20by%20xsane?&In-Reply-To=<20000322132958.A23851@ecs.soton.ac.uk>"><EM>njl98r@ecs.soton.ac.uk</EM></A>)<BR>
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<STRONG>Date:</STRONG> Wed Mar 22 2000 - 05:29:58 PST
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<LI><STRONG>Previous message:</STRONG> <A HREF="0235.html">John Gay: "How can I get sane to recognise my scanner if I turn it on AFTER the PC?"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0234.html">Stephen Williams: "Re: Can thumbnails be included in jpeg images generated by xsane?"</A>
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On Tue, Mar 21, 2000 at 08:04:02PM -0800, Stephen Williams wrote:
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<EM>> In the first APP0 marker there are Xthumbnail and Ythumbnail fields to
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</EM><BR>
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<EM>> specify the dimensions of the thumbnail. That is then followed by
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</EM><BR>
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<EM>> 3*X*Y bytes of RGB thumbnail data.
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</EM><BR>
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<P>Oops, my mistake. He's quite right - page 6 of JFIF 1.02 specifies an
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Xthumbnail and Ythumbnail, and IJG complain elsewhere that Potatoshop
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puts an enormous "thumbnail" image in APP0 by default. There are also
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two pages devoted to wacky stuff like GIF-style previews for JPEG
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images, no wonder I put this stuff to the back of my mind :)
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<BR>
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<P>Well, Gimp doesn't support that feature anyway, so the fact remains
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that to get Gimp to see thumbnails they have to be in .xvpics.
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<BR>
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<P>Nick.
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<BR>
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<P><PRE>
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--
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Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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<LI><STRONG>Next message:</STRONG> <A HREF="0237.html">Oliver Rauch: "Re: How can I get sane to recognise my scanner if I turn it on AFTERthe PC?"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0235.html">John Gay: "How can I get sane to recognise my scanner if I turn it on AFTER the PC?"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0234.html">Stephen Williams: "Re: Can thumbnails be included in jpeg images generated by xsane?"</A>
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