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Well, I actually implemented this idea in Mirone long time ago.
First with SIFT and later with the SURF module in OpenCV, but I
really never tested much from the the point that "some cases work
well, others not so much".<br>
<br>
Anyway, you might be interested to look also into ASIFT. It looks
promising<br>
<br>
<a class="moz-txt-link-freetext" href="http://www.cmap.polytechnique.fr/~yu/research/ASIFT/demo.html">http://www.cmap.polytechnique.fr/~yu/research/ASIFT/demo.html</a><br>
<br>
Joaquim<br>
<br>
<blockquote
cite="mid:CAMKgpObpXavoPfyXxC1R4xpOvE6SaroMmCpxqE5GAuMR5U-Qsg@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>Hi all,<br>
</div>
<div>I talked with Kshitij about this idea at length. I am sure
that he can do a good job. He has the programming skills and
has academic background in image processing and computer
vision.</div>
<div><br>
</div>
<div>I am willing to co-mentor him.</div>
<div><br>
</div>
<div>Kshitij,
<div>You did not include the extensions we discussed.
Estimating the shift between two georeferenced images,
matching rasters with vector datasets.</div>
</div>
<div><br>
</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Mon, Jan 27, 2014 at 1:16 PM,
Kshitij Kansal <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:kansal.k@gmail.com" target="_blank">kansal.k@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div>Hello Everyone</div>
<div><br>
</div>
<div>I am an undergrad student in my Junior year of study.
I have been involved with some research in field of
Spatial Temporal Analysis of Images. I have been using
the GDAL for various purposes, for quite some time now.
I thought that now its time to contribute something to
Open Source Community. So I started to think about the
GSoC, 2014. As I started browsing the last year's ideas,
one idea that I could relate was "<b>Raster / Vector
Geo-referencer on the Web</b>".</div>
<div><br>
</div>
<div><b>Motivation:</b></div>
<div>The main motivation behind this is that, among the
very first things that are required in many remote
sensing/geo-spatial related projects are geo-referenced
images. Most of the images that we have are generally
not referenced and hence we have to go to some tool and
MANUALLY reference them with the help of some reference
image. This generally takes a lot of time and most of
the times errors do creep in.</div>
<div><br>
</div>
<div><b>Original Idea:</b></div>
<div>What has been proposed in this(as a part of GSoC'13
idea) was that we should provide two image, one
reference image and other un-referenced image. Now with
the help of this we should be able to geo-reference this
unreferenced image by MANUALLY selecting the Control
Points. Some thing like this : <a moz-do-not-send="true"
href="http://www.youtube.com/watch?feature=player_embedded&v=88gt1gj2dbs"
target="_blank">http://www.youtube.com/watch?feature=player_embedded&v=88gt1gj2dbs</a> </div>
<div><br>
</div>
<div><b>Modified Idea:</b></div>
<div>Now what I felt was that, this idea can be made more
innovative and useful if we can AUTOMATE this whole
process of geo-referencing along with providing the
option for manual selection. This is where the knowledge
of Image Processing can help. There are various
algorithms(like SIFT/SURF) which can be used for doing
this. We can apply these algorithms and extract the
GCP's and then geo-reference the images. Also, this
thing has not been implemented in any of the other open
source softwares(like GRASS,QGIS). So if we can
implement this, other communities can build on these
ideas or even adapt it. It would be "e<span
style="font-size:13px;font-family:Verdana,Arial,'Bitstream
Vera Sans',Helvetica,sans-serif">ntirely based on GDAL
and completely reusable"</span></div>
<div><br>
</div>
<div>Furthermore, this idea can be expanded a lot in the
sense that we should not not put restrictions to the
number of bands in the images. Now what I mean by this
is that reference image's bands may not be the same
order of unreferenced. It should work with images of any
number of bands.<br>
</div>
<div><br>
</div>
<div>Any Comments or Suggestions or Feedback ?</div>
<div>Anyone willing to help me in this? </div>
<div><br>
</div>
<div>Regards,</div>
<div>
<div dir="ltr">
<blockquote style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">Kshitij
Kansal</blockquote>
<blockquote style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">Lab
For Spatial Informatics,<br>
</blockquote>
<blockquote style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">IIIT
Hyderabad<br>
</blockquote>
</div>
</div>
</div>
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</blockquote>
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<br>
<br clear="all">
<div><br>
</div>
-- <br>
Best regards,<br>
Chaitanya kumar CH.<br>
<br>
+91-9494447584<br>
17.2416N 80.1426E
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