<div dir="ltr"><div><h3 id="WeeklyReport1214thAugust2016"><span style="font-weight:normal"></span></h3><h3 id="WeeklyReport1214thAugust2016"><a title="Link to this section" href="https://trac.osgeo.org/ossim/wiki/ACompletePhotogrammetricOSSIMtoolForAutomaticDSMenerationUsingMultiViewOpticalAndSARimages#WeeklyReport1214thAugust2016" class=""></a></h3>Dear all, <br><br></div>hereafter the text of my last report.<br><div><br>BRIEF DESCRIPTION OF THE IDEA:
<p>
My project concerned the improvement and the implementation of new
functionalities for DATE (Digital Automatic Terrain Extractor) OSSIM
plug-in, which development I had started two years ago. In particular
the focus was about the complete automatization of the pyramidal
approach of the tool chain and the creation of a complete workflow for
DSMs generation from SAR images.
</p>
<p>
<br>
THE STATE OF THE PROJECT AS IT WAS BEFORE MY 2016 GSoC:
</p>
<p>
Before this GSoC, DATE was an OSSIM plug-in for DSMs generation from
optical stereo-pair and triplets, not able to process SAR images.
Moreover, if you have got more than a triplets, for example a stack of
images, you had to manually merge the DSMs obtained to fuse the
informations.
Furthermore, the pyramidal approach implemented was not automatic.
</p>
<p>
<br>
THE ADDITION THAT MY PROJECT BROUGHT TO THE SOFTWARE:
</p>
<p>
My work has complemented OSSIM with some processing algorithms for high
resolution satellite optical and SAR images. With my addition, now it is
possible to generate automatically DSMs from SAR imagery using an
iterative coarse-to-fine approach, to take advantage of iterative
solutions at gradually increasing resolution. Furthermore, I have
implemented automatic masks generation for foreshortening and layover
areas in SAR images: so far, it is possible to generate a DSM from SAR
imagery (automatically detecting the ascending or descending orbit),
masked for foreshortening and layover areas in order to correct from
potential geometric distortions. Moreover, in order to obtain a more
accurate DSM by exploiting the redundancy of multiple information, I
have implemented the DSMs merging on the basis of mean and standard
deviation of ascending and descending stacks and of the automated
generated masks for foreshortening and layover areas in SAR images.
</p>
<p>
Here <a class="" href="https://github.com/martidi/opencv_dsm/tree/imageStack"><span class=""></span>https://github.com/martidi/opencv_dsm/tree/imageStack</a> you can find all the code I developed and the instructions to test it. <br></p><p>Here <a href="https://trac.osgeo.org/ossim/wiki/ACompletePhotogrammetricOSSIMtoolForAutomaticDSMenerationUsingMultiViewOpticalAndSARimages#WeeklyReport1214thAugust2016">https://trac.osgeo.org/ossim/wiki/ACompletePhotogrammetricOSSIMtoolForAutomaticDSMenerationUsingMultiViewOpticalAndSARimages#WeeklyReport1214thAugust2016</a> you can find all my weekly reports.</p><p>Here <a href="https://www.dropbox.com/s/3rsn1cxpulpg4ox/Slide%20per%20Report.pdf?dl=0">https://www.dropbox.com/s/3rsn1cxpulpg4ox/Slide%20per%20Report.pdf?dl=0</a> a slide to show the main elements of my project.<br></p>
<p>Martina</p><br clear="all"><br>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div><span><font color="#888888"></font></span><span><font color="#888888"><div><span style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif" lang="DE">Martina Di Rita, </span><i>PhD Student</i> <br></div><div><span style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif" lang="DE">Geodesy and Geomatics Division </span><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px"> <br></span></div><span style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif" lang="DE">University of Rome "La Sapienza" <br>via Eudossiana, 18 - 00184 Rome<font color="#888888"> </font>Italy</span></font><font color="#888888"><span style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif" lang="DE"><br></span></font></span></div><div dir="ltr"><span><span><font color="#888888"><span style="color:rgb(0,0,0)">Phone</span> <span style="color:rgb(0,0,255)"><u><span style="background-color:rgb(255,255,255)">++39 0644585087</span></u></span><br>
<span style="color:rgb(0,0,0)">E-mail</span> <a href="mailto:martina.dirita@uniroma1.it" target="_blank"><span style="color:rgb(0,0,255)"><u><span>martina.dirita@uniroma1.it</span></u></span></a></font></span></span></div></div></div></div></div></div></div></div></div></div>
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