Hi Guillaume, I'm also trying to do supervised object-based classification. What I did so far is a meanshift segmentation on my satellite raster image. Then I did TrainImagesClassifier (svm) on the vector results of the segmentation. And at this point I'm not sure anymore what to do as there was no output on the previous step. Could you guide me from the segmentation to have an object-based classification using SVM ?
(I tried to do OGRLayerClassification, but had no idea of what to put in the xml inputs etc..., the only input I have are my raster and my segmentation vector result) Thank you ! Le jeudi 24 novembre 2016 14:46:00 UTC+1, Guillaume Pasero a écrit : > > Hi Patricia, > > If I understand right, you want to perform object-based classification. > > In OTB-5.6.1 there is the application TrainVectorClassifier to train a > classifier based on input geometries. You have to set several fields in the > geometries you want to use for training : > > - one field to indicate the class of the geometry > > - several numeric fields to store the features attached to geometries. > > The fields can be extracted from a raster with LSMSVectorization and > modified with QGis. > > After the training, you can either apply the model on the full set of > geometries (with OGRLayerClassifier), or try to apply it on a raster (with > ImageClassifier, but more difficult). > > Regards, > > Guillaume > On 11/24/2016 02:09 PM, Patricia Lourenco wrote: > > Dear all, > I am new with OTB-Monteverdi 5-6-1. > > I want to classify an image based on the segments created in the > LSMVSVectorization (step 4 of the segmentation)using OTB/Monteverdi > versions 5.6.1. > However, I am not being able to do it. > > My questions are: > > 1. Which are the steps that I should take to do a classification based on > segmentation? > > 2. Which OTB-Application should I use to select the segments for my > classes? > > Thank you, in advance, for your help. > > Sincerely, > Patricia > -- > -- > Check the OTB FAQ at > http://www.orfeo-toolbox.org/FAQ.html > > You received this message because you are subscribed to the Google > Groups "otb-users" group. > To post to this group, send email to [email protected] > <javascript:> > To unsubscribe from this group, send email to > [email protected] <javascript:> > For more options, visit this group at > http://groups.google.com/group/otb-users?hl=en > --- > You received this message because you are subscribed to the Google Groups > "otb-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:>. > For more options, visit https://groups.google.com/d/optout. > > > -- > <http://www.c-s.fr> *Guillaume PASERO* > Responsable technique > *Business Unit E-SPACE & Geo Information - Département Image & > Applications* > > *CS Systèmes d'Information* > Parc de la Grande Plaine - 5, Rue Brindejonc des Moulinais - BP 15872 > 31506 Toulouse Cedex 05 - FRANCE > +33 561 17 64 21 - [email protected] <javascript:> > -- -- Check the OTB FAQ at http://www.orfeo-toolbox.org/FAQ.html You received this message because you are subscribed to the Google Groups "otb-users" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/otb-users?hl=en --- You received this message because you are subscribed to the Google Groups "otb-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
