Hi, Would anyone be able to help me?
Would be possible to have my training and validation sets saved as vector shapefile? I was able to generate my LU maps but I don't know for example which pixels were used for the validation or training set. Is possible to calculate a confusion matrix for this training samples as well? I really appreciate any help. Regards On Thursday, August 27, 2015 at 2:48:25 PM UTC+8, 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.
