Dear Thayse , Could you please describe the way you use OTB? My experience with OTB is as part of QGIS. I could say that the output files generated by training procedure are with confusion matrix and the model file. Also in the log window of the GUI have the conf. matrix as well.
Good luck Hristo On Thursday, 27 August 2015 09:48:25 UTC+3, Thayse Nery wrote: > > Hi all, > > I am doing an object based Land Use changes classification and I have my > sample training with almost 20000 pixels. I used the TrainImagesClassifier > and selected the ratio between training and validation samples to be 70% > training and 30% validation. > > As we know, this tool generates 2 files, one is the transition matrix for > the validation set and the other one is .txt file for the training set. I > would like to have a transition matrix also for my training set. But since > its generates only a text file, I am not able to Compute a Confusion Matrix > for it. I can use this text file only for the Image Classification but I do > not know how to access the performance for the training sample based on the > F-score, precision, recall and overall accuracy. > > I would like to know if it is possible to* calculate a confusion matrix > for this training samples*. I could have used my original shapefile to do > that, but since the TrainImagesClassifier uses some calculation such as the > maximal size of the available validation sample list per class will be > equal to the surface area of the smallest class multiplied by the > validation sample ratio, I do not know exactly which samples were selected > for the training and validation samples. > > Thanks for any help! > > Cheers, > Thayse Nery > -- -- 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.
