To complete Jordi's answer the application should also be able to handle
image and vector data in different projections as vector data are
reprojected internally in the application:
https://git.orfeo-toolbox.org/otb.git/blob/HEAD:/Modules/Applications/AppClassification/app/otbTrainImagesClassifier.cxx#l308
Le 28/07/2016 18:18, Theodosia Vardoulaki a écrit :
thank you Jordi!!
your answer is really helpful. there is conflict between the image and
the shp file.
2016-07-27 9:29 GMT+03:00 Jordi Inglada <[email protected]
<mailto:[email protected]>>:
Hi Theodosia,
When no samples are found, usually this is due to one of these
issues :
- the image and the reference data files do not have the same
projection
- the reference data has to be made of polygons (not points, not
poly-lines)
- the attribute of the vector data containing the class label
(integer) has to have the same name as the one you specify with
the -sample.vfn option in the application
If you do not manage to solve your problem with these hints, you
may want to make available a small data set showing the problem so
we can investigate.
Good luck,
Jordi
Theodosia Vardoulaki <[email protected]
<mailto:[email protected]>> wrote:
>
> Hello,
>
> although the example of otb application for train images SVM
classifier is successfully executed with the out of the box
installation OTB 5.4.0. Now with my data which are a google maps
image with georeference, a shapefile is made with the same way
like the
> example and statistics of the image are computed with otbcli,
the application is displayed in logs the following error :
>
> 367: itk::ERROR: No training sample found inside image.
>
> Do you have any idea which is the problem now and what could i do?
>
> PS : i tried to make the shp with different ways but i didn't
manage to have a result.
>
> thank you
>
> 2016-07-25 14:21 GMT+03:00 Theodosia Vardoulaki
<[email protected] <mailto:[email protected]>>:
>
>
> With OTB 5.4.0, i can get result for classification with svm
classifier.
>
> thanks
>
> 2016-07-12 9:41 GMT+03:00 Theodosia Vardoulaki
<[email protected] <mailto:[email protected]>>:
>
>
> thank you Julien I'll try it.
>
> Τη Δευτέρα, 11 Ιουλίου 2016 - 9:50:32 π.μ. UTC+3, ο χρήστης
Julien Michel έγραψε:
>
>
> It might be that Ubuntu package is built with libsvm support.
If so, it
> should.
>
> Anway, you can try our standalone package which will work "out
of the box" :
>
> https://www.orfeo-toolbox.org/packages/OTB-5.4.0-Linux64.run
>
> Julien
>
> Le 08/07/2016 à 18:45, Theodosia Vardoulaki a écrit :
> > Hello,
> >
> > I would like to ask about otbcli and SVM classifier. I tried
to do the
> > example of supervised classification from OTB applications
with SVM
> > classifier. I followed exactly the instructions of cookbook
and from
> > here
> >
(https://www.orfeo-toolbox.org//Applications/TrainImagesClassifier.html)
> > and it is displayed the following error :
> >
> > ERROR: option -classifier.libsvm.k does not exist in the
application.
> > This is the TrainImagesClassifier application, version 5.2.0
> > Train a classifier from multiple pairs of images and training
vector data.
> >
> > I have the version 5.2.1 and i use Ubuntu 14.04. Do you have
any idea
> > which is the problem and what could i do?
> >
> > Thank you
> >
> >
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