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<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:#1F497D">Unfortunately the XML that describes this information is excluded from the slide properties so this makes your job a lot harder. If you know that the image
is a Leica SCN file then maybe you could open the file (as a BigTIFF) yourself and read out the ImageDescription tag from the zeroth IFD. This is XML and the <view> element in an <image> defines where the ROI is relative to the origin of the slide overview.
This origin is at the top-left of the slide and the offsets and sizes are in nanometres.</span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:#1F497D">Good luck,</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:#1F497D">John</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:#1F497D"> </span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri",sans-serif"> openslide-users-bounces+john.stevenson-hoare=ffei.co.uk@lists.andrew.cmu.edu
[mailto:openslide-users-bounces+john.stevenson-hoare=ffei.co.uk@lists.andrew.cmu.edu]
<b>On Behalf Of </b>Nikolay Kladt<br>
<b>Sent:</b> 07 November 2014 13:55<br>
<b>To:</b> openslide-users@lists.andrew.cmu.edu<br>
<b>Subject:</b> Openslide Usage</span></p>
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<p class="MsoNormal">Hi everybody,</p>
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<p class="MsoNormal">I have just started to use OpenSlide Python to look at Leica Slidescanner images. While the basic usage is very simple, there is one question for which I cannot seem to find the answer: </p>
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<p class="MsoNormal">The scn file has multiple associated images (scanned ROIs) that have been scanned with identical resolution. How do I access individual images or get their bounds? It seems that the properties do not show the required information but the
file format description includes multiple images.</p>
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<p class="MsoNormal">I think I can work-around easily by a first-pass, detecting background pixels to obtain the ROIs on level zero using tiled reading, before actually doing anything else but it seems that this information is somewhere already... I am pretty
sure I got confused somewhere..</p>
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<p class="MsoNormal">If this is a problem of having test data, we can easily generate data sets that can be shared.</p>
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<p class="MsoNormal">Best (and thanks for writing a very promising tool),</p>
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<p class="MsoNormal">Niko<br clear="all">
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<p class="MsoNormal">-- </p>
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<p class="MsoNormal">Dr. Nikolay Kladt</p>
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<p class="MsoNormal"><span style="font-size:9.0pt; font-family:"Verdana",sans-serif">Image and Data Analyst, CECAD Imaging Facility</span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt; font-family:"Verdana",sans-serif"><a href="mailto:kladtn@uni-koeln.de" target="_blank">kladtn@uni-koeln.de</a></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt; font-family:"Verdana",sans-serif">++49 221 478 84028</span></p>
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<p class="MsoNormal"><a href="https://www.linkedin.com/in/kladtn" target="_blank">https://www.linkedin.com/in/kladtn</a></p>
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<p class="MsoNormal"><span style="font-size:9.0pt; font-family:"Verdana",sans-serif">CECAD Cologne - Excellent in Aging Research<br>
Universität zu Köln<br>
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50931 Cologne</span></p>
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