Re: [otb-users] SVM oneclass classification error handling

[Guillaume Pasero]

Hi, The -classifier.libsvm.m option should be supported, what OTB version do you use in OSGeo4W ? The first error is a bit obscure, but the second one looks like a problem with the input statistics. Does the statistics file contain 3 components for average and standard deviation? I think both extensions .svm and .txt should work. Best, Guillaume On 07/05/2016 05:11 PM, sophie.crommeli...@gmail.com wrote: Hello, I would like to use orfeo for a libsvm oneclass classification. However, I get error messages that don't really help to see my mistake. Maybe someone encountered a similar error. Before I list my questions, I will explain what I did: Generate training samples I created a polygone shapefile layer in QGIS and manually drew polygons with class label 1 for the features, I would like to extract. result: Train_Samples_1Class.shp Compute image second order statistics otbcli_ComputeImagesStatistics -il namibia_orthoimage.tif -out namibia_orthoimage_statistics.xml Train SVM classifier otbcli_TrainImagesClassifier -io.il namibia_orthoimage.tif -io.vd Train_Samples_1Class.shp -io.imstat namibia_orthoimage_statistics.xml -sample.mv 100 -sample.mt 100 -sample.vtr 0.5 -sample.vfn Class -classifier libsvm -classifier.libsvm.k linear -classifier.libsvm.c 1 -classifier.libsvm.m oneclass -classifier.libsvm.opt 1 -io.out SVM_Model.txt -io.confmatout SVM_ConfusionMatrix.csv This gives the error "could not find paramter m" when run as a Pyhton script in the OSGeo4W Shell and "option -classifier.libsvm.m does not exist in the application" when run directly as the command-line listed above. Therefore, I tried it without the oneclass option and created training samples with two classes (1: feature to be detected, 0 for all remaining polygons --> result: Train_Samples.shp) and changed the above code as follows: otbcli_TrainImagesClassifier -io.il namibia_orthoimage.tif -io.vd Train_Samples.shp -io.imstat namibia_orthoimage_statistics.xml -sample.mv 100 -sample.mt 100 -sample.vtr 0.5 -sample.vfn Class -classifier libsvm -classifier.libsvm.k linear -classifier.libsvm.c 1 -classifier.libsvm.opt 1 -io.out SVM_Model.txt -io.confmatout SVM_ConfusionMatrix.csv This gives the error "Input primary is required but not set" (ErrorI attached), when run as a Pyhton script in the OSGeo4W Shell and "Inconsistent measurement vector size: Input Sample List size 3 Scale measurement vector size 0 Shift measurement vector size 0" (Error II) when run directly as the command-line listed above. I also attached the Python script, I refer to, to make it clearer. When I alternatively try to do train the SVM classifier via the Orfeo GUI in QGIS, I don't get any output or error message. Questions: How do I correctly use the oneclass SVM classifier? Where is my error for training the two class SVM classifier? Does the output model file need to be .svm or .txt? I found different versions in https://www.orfeo-toolbox.org//CookBook/CookBooksu39.html#x58-910003.4.1 and in https://www.orfeo-toolbox.org/CookBook/CookBooksu123.html#x154-9080004.8.10 Thanks a lot! Sophie -- -- 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 otb-users@googlegroups.com To unsubscribe from this group, send email to otb-users+unsubscr...@googlegroups.com 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 otb-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- 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 - guillaume.pas...@c-s.fr -- -- 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 otb-users@googlegroups.com To unsubscribe from this group, send email to otb-users+unsubscr...@googlegroups.com 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 otb-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.