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<p>Javier,</p>
<p>What about the hard core GDAL contributor way of starting with a
small JPEG image and then adding the needed bytes with your
favorite hexadecimal editor :-) ?</p>
<p>Otherwise, still a bit of use of your hexadecimal editor, but
just to find out a couple offfset/lenghts, you may try the trick
of starting from an existing file, keeping the begin in a part,
the end in the other part, and omitting most of the embedded image
using a /vsisparse/ .XML file and replacing it with a
<ConstantRegion> at zero. Like
<a class="moz-txt-link-freetext" href="https://github.com/OSGeo/gdal/blob/master/autotest/gdrivers/data/grib/rotated_pole.grb2.xml">https://github.com/OSGeo/gdal/blob/master/autotest/gdrivers/data/grib/rotated_pole.grb2.xml</a>
and then you use "/vsisparse/your.xml" as a valid JPEG dataset
name.</p>
<p>Or variation of the above, perhaps a bit less convoluted, start
with your initial image, set to the zero byte unneeded ranges, and
zip it.</p>
<p>Even</p>
<div class="moz-cite-prefix">Le 30/01/2026 à 10:43, Javier Jimenez
Shaw via gdal-dev a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:CADRrdKsS5sHZaKBjHc1ds7vXti=5hWAg2wXtSCFfGzgOx2xhHw@mail.gmail.com">
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<div dir="ltr">
<div>Hi</div>
<div><br>
</div>
<div>TL;DR: I need a "small" FLIR image file for a unit test in
GDAL. Do you have one?</div>
<div><br>
</div>
<div>I am working on GDAL's thermal jpeg code, to read an
embedded RGB image that some FLIR cameras are including inside
the JPEG, in addition to the thermal information/image.</div>
<div><br>
</div>
<div>I want to add a unit test with a real image, but
unfortunately I only have "big" images, around 4 or 5 MB.</div>
<div><br>
</div>
<div>It would be great if anybody has a smaller image that can
be included in the GDAL tests code (with the copyright/license
permissions that it has).</div>
<div>The model "FLIR T640" I think produces images of about 1.5
MB only. But it can be other models as well.</div>
<div><br>
</div>
<div>To check if it has the Embedded Image, just run this:</div>
<div><br>
</div>
<div><span style="font-family:monospace">exiftool -EmbeddedImage
filename.jpg</span></div>
<div><br>
</div>
<div>If you see any output, please contact me.</div>
<div><br>
</div>
<div>Thank you!</div>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
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</blockquote>
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My software is free, but my time generally not.</pre>
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