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>wrote: > Kshitij Kansal <kansal.k <at> 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 > http://lists.osgeo.org/mailman/listinfo/gdal-dev >
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