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<TITLE>sane-devel: Re: Can thumbnails be included in jpeg images gener</TITLE>
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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=&lt;20000322132958.A23851@ecs.soton.ac.uk&gt;"><EM>njl98r@ecs.soton.ac.uk</EM></A>)<BR>
<STRONG>Date:</STRONG> Wed Mar 22 2000 - 05:29:58 PST
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On Tue, Mar 21, 2000 at 08:04:02PM -0800, Stephen Williams wrote:
<BR>
<EM>&gt; In the first APP0 marker there are Xthumbnail and Ythumbnail fields to
</EM><BR>
<EM>&gt; specify the dimensions of the thumbnail. That is then followed by
</EM><BR>
<EM>&gt; 3*X*Y bytes of RGB thumbnail data.
</EM><BR>
<P>Oops, my mistake. He's quite right - page 6 of JFIF 1.02 specifies an
<BR>
Xthumbnail and Ythumbnail, and IJG complain elsewhere that Potatoshop
<BR>
puts an enormous &quot;thumbnail&quot; image in APP0 by default. There are also
<BR>
two pages devoted to wacky stuff like GIF-style previews for JPEG
<BR>
images, no wonder I put this stuff to the back of my mind :)
<BR>
<P>Well, Gimp doesn't support that feature anyway, so the fact remains
<BR>
that to get Gimp to see thumbnails they have to be in .xvpics.
<BR>
<P>Nick.
<BR>
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