Hi,
Even note that you cannot get the code from this projects and merge it
to GDAL, but you free to develop you own implementation of this
algorithms as path of GDAL.
This is a same situation with correlator. Andrew cannot get code from
OpenCV and GRASS as incompatible licenses, so the own (simple)
implementation was provided.
One can change this implementation to be more advanced: support large
datasets, more bands, etc. Everybody welcome to do it.
Best regards,
Dmitry
08.02.2014 2:15, Kshitij Kansal ?????:
Sir
I am providing the links for both the algorithms that I talked. I am
new to this licence issues thing so I would be highly grateful if you
can clarify doubts and if can proceed on working for this idea.
http://www.cs.ubc.ca/~lowe/keypoints/
<http://www.cs.ubc.ca/%7Elowe/keypoints/> (SIFT)
http://www.ipol.im/pub/art/2011/my-asift/ (ASIFT) [here source code is
provided. It contains license ]
http://www.cmap.polytechnique.fr/~yu/research/ASIFT/demo.html
<http://www.cmap.polytechnique.fr/%7Eyu/research/ASIFT/demo.html> (Demo Page
for ASIFT)
The SIFT algorithm in itself is patented. They only provide binaries.
I am not sure If we can use those binaries or not.
As far as ASIFT is concerned, i think its implementation is only
patented.
Kindly clarify this.
Thanking You
With Regards,
Kshitij Kansal
Lab For Spatial Informatics,
IIIT Hyderabad
On Sat, Feb 8, 2014 at 2:23 AM, Even Rouault
<even.roua...@mines-paris.org <mailto:even.roua...@mines-paris.org>>
wrote:
Selon Kshitij Kansal <kansa...@gmail.com <mailto:kansa...@gmail.com>>:
Kshitij,
I'm surprised that you mention licenses
for algorithms. What are your sources for that?
Only *implementations* can be licensed
not algorithms themselves. So if you
develop your own implementation you are free
to select the license you wish. There
might be issues linked to potential pattents
in some countries but that is acceptable in my opinion
as software parents are not valid in all contries
so mentionning potential issues with them
in the documentation is sufficient .
> Hello
>
> Based on all suggestion
ins and comments above, I have come up with one thing.
>
> The most important thing that could have been a road block for
this project
> was licence issues which was pointed by Even Rouault.
>
> I am interested in implementing the SIFT or ASIFT algorithms for
automatic
> geo-referencing which I proposed in above mails. I am interested
in making
> a separate tool which will be completely based on the GDAL and
maintained
> by GDAL community. I looked into the GDAL-correlator idea which
was also
> implemented as a part of GSoC. That idea uses only *SIMPLE SURF
*algorithm
> for control point detection and is only *limited to small size
three band
> imagery(RGB)*.
>
> I am interested in developing something that is fully automated
and works
> on large multi band imagery.But the above two algorithms that I
am planning
> to use come up with the licence that does not allows the free
use for
> commercial purposes. The free use of above algorithm are
restricted to *"non
> profit research and non profit educational purposes"*(in case of
> ASIFT) and *"research
> purposes only" *(in case of SIFT).
>
> This means that the final product as a result of this product
will also be
> bounded by the above licences. It can not go into GDAL's main
distribution
> but can be used as a separate utility of GDAL for non-commercial
uses only.
> Basically the commercial use of the tool won't be allowed
without approval
> from the concerned people.
>
> Your views and suggestions are highly appreciated.
>
> Regards,
>
> Kshitij Kansal
>
> Lab For Spatial Informatics,
>
> IIIT Hyderabad
>
>
>
> On Thu, Jan 30, 2014 at 12:25 PM, Kshitij Kansal
<kansa...@gmail.com <mailto:kansa...@gmail.com>> wrote:
>
> > Hello
> >
> > @Jukka Rahkonen: The OSSIM project (the link you provided) is
more of
> > image orthorectification. Although
> > they are doing image co-registration but its as one of the
steps of
> > orthorectification(I could only understand this from the manual).
> > Also I am not sure of the techniques they are using for this
purposes.
> > (Its written corner point detection but How?)
> > I am new to OSSIM, so not aware of this thing's functionality and
> > accuracy. I am in the process of estimating it.
> >
> > Thank you for pointing this out.
> >
> > Coming to the Frank Warmerdam's blog
(http://fwarmerdam.blogspot.fi/).
> > Here the author is talking about writing a code for converting
the GCP's
> > into RPC's. But the next question comes is where is he getting
GCP's from.
> > Now this is the part where I aim to work on and improve.
> >
> > Given two images, if we can automatically extract GCP's from
them then we
> > are in a way speeding up and automating this whole process.
Once we have
> > GCP, there are a lot of things that we can do from them like
> > geo-referencing(which I plan on doing), image stitching etc.
> >
> > *Also you talked about a "more light weighted system". Can you
please
> > elaborate on this?* I could not understand what you actually
meant from
> > that.
> >
> > If we look into the last year idea's page (
> > http://trac.osgeo.org/gdal/wiki/SummerOfCode), there is one
idea that is
> > proposed regarding the "Raster/Vector geo-referencer on the
Web". I want to
> > modify this idea a little bit and want to automate the whole
process. As
> > far as the automation is concerned, we can develop GDAL
functions for
> > that(which will be completely re-usable) and then developing a
Web based
> > geo-referencer would only require calling those functions.
> >
> > If we do this thing,* two objectives will be fulfilled*.*
First*, GDAL
> > will get a web based geo-referencer. *Secondly*, communities
that use
> > GDAL and have not developed these kind of geo-referencer(Like
QGIS) can
> > directly use the functions developed and then build on that.
> >
> > Suggestions and comments are welcomed.
> >
> > Thank you for your propositions.
> >
> > Regards,
> >
> > Kshitij Kansal
> >
> > Lab For Spatial Informatics,
> >
> > IIIT Hyderabad
> >
> >
> >
> > On Wed, Jan 29, 2014 at 1:27 PM, Jukka Rahkonen
<jukka.rahko...@mmmtike.fi <mailto:jukka.rahko...@mmmtike.fi>
> > > wrote:
> >
> >> Kshitij Kansal <kansal.k <at> gmail.com <http://gmail.com>>
writes:
> >>
> >> >
> >> > Even,
> >> > Thank you for pointing out this issue. I will keep this in
mind.
> >> >
> >> > I will look into that last year project and try to
understand the
> >> implementation.
> >> >
> >>
> >> > More suggestions and comments are always welcomed.
> >>
> >> Hi,
> >>
> >> Another OSGeo project OSSIM has implemented an automatic
image to image
> >> rectification. Isn't that a bit alike your plan?
> >>
http://download.osgeo.org/ossim/docs/OSSIM_Coregistration_UserManual.pdf
> >>
> >> Frank Warmerdam seems to entertain himself with something related
> >> http://fwarmerdam.blogspot.fi/
> >>
> >> This article from 2013 may also give some inspiration
> >>
> >>
>
http://www.academia.edu/4388853/OrientAL_-_Automatic_geo-referencing_and_ortho-rectification_of_archaeological_aerial_photographs
> >>
> >> All these three aim to very high quality and I am sure that
there is also
> >> need for a more light-weight system.
> >>
> >> -Jukka Rahkonen-
> >>
> >> _______________________________________________
> >> gdal-dev mailing list
> >> gdal-dev@lists.osgeo.org <mailto:gdal-dev@lists.osgeo.org>
> >> http://lists.osgeo.org/mailman/listinfo/gdal-dev
> >>
> >
> >
>
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