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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi Miltinho,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If I understood you correctly, I think we are facing similar challenges, because we are planning to test our wildlife foto traps in a remote sensing
context where we need to have a proper georeference for each image.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I assume all your images are equal, means they cover the same surface on the ground and are taken from the same angle and with the same camera?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Because of other obligations we have not really started the work yet, but we consider two alternative solutions:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">A full GRASS based ortorectification:
<a href="http://gis.cri.fmach.it/uploads/CAGEO_2011.pdf">http://gis.cri.fmach.it/uploads/CAGEO_2011.pdf</a> (for this one I have to talk to our camera operator that he provides the necessary information on fiducial marks, and necessary camera parameters, not
sure if we can make it work)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Or (more “quick and dirty”) using ground control points in gdalwarp (<a href="http://www.gdal.org/gdalwarp.html">http://www.gdal.org/gdalwarp.html</a>).
Probably, you may have to add the GCPs to the image using gdal_translate (then VRT is a recommended output format) in advance to gdalwarp.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Don`t know how far this work got: http://linfiniti.com/2010/10/automated-gcp-collection-in-quantum-gis/
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">In any case I would be interested in how you solved this at the end…<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Cheers and good luck<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Stefan
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> grass-user-bounces@lists.osgeo.org [mailto:grass-user-bounces@lists.osgeo.org]
<b>On Behalf Of </b>Milton Ribeiro<br>
<b>Sent:</b> 30. juli 2014 04:41<br>
<b>To:</b> grass-user grass-user<br>
<b>Subject:</b> [GRASS-user] align large number of images in a automated way<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-JM">Dear all,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-JM"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-JM">I have a large number of images that was taken using a camera in the top of a 15 m tall tower.
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-JM">Now I need to align or spatially synchronize them using same automated solution, because it is not feasible one by one (I have 18,000 photos).</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-JM">Any hint are welcome.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">best wishes <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Miltinho - <a href="mailto:mcr@rc.unesp.br" target="_blank">
mcr@rc.unesp.br</a><br>
Laboratório de Ecologia Espacial e Conservação - LEEC<br>
Depto de Ecologia - UNESP - Rio Claro<br>
Av. 24A, 1515- Bela Vista<br>
13506-900 Rio Claro, SP, Brasil<br>
<br>
Fone: +55 19 3526-9647 (office) 19 3526-9680 (lab)<br>
Cel: 19 9853-3220 / 19 9853-5430<br>
<br>
Depto Ecologia <a href="http://ib.rc.unesp.br/#!/departamentos/ecologia/" target="_blank">
http://ib.rc.unesp.br/#!/departamentos/ecologia/</a><br>
PG ECO & BIODIV <a href="http://ib.rc.unesp.br/#!/departamentos/ecologia/pos-graduacao-em-ecologia-e-biodiversidade/" target="_blank">
http://ib.rc.unesp.br/#!/departamentos/ecologia/pos-graduacao-em-ecologia-e-biodiversidade/</a><br>
<br>
CV <a href="http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792988H6&mostrarNroCitacoesISI=true&mostrarNroCitacoesScopus=true" target="_blank">
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792988H6&mostrarNroCitacoesISI=true&mostrarNroCitacoesScopus=true</a><br>
<br>
Google citations <a href="http://scholar.google.com/citations?user=OWX_2eAAAAAJ" target="_blank">
http://scholar.google.com/citations?user=OWX_2eAAAAAJ</a></span><o:p></o:p></p>
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