Hello, I'am trying to improve my process chain for Sentinel 2 with OTB, and as you said few weeks before, there're two implementations of the Random Forest in OTB; My question is about how can I choose between opencv and shark libs? and if it's possible to force the process to use shark instead of opencv?
Best regards Le mardi 28 mars 2017 15:31:11 UTC+2, Manuel Grizonnet a écrit : > > Hi, > > note first there are 2 implementations of random forests now available in > OTB since release 5.8. One from openCV and the other one from the shark > machine learning library (which allows parallel training). Both > implementations are wrappers around those libraries and you generally have > to dig into libraries documentation to find out such information. > > Regarding the criteria, I think that both opencv and shark implementations > use the Gini criterion (for shark I'm quite sure). Would be glad if someone > who know a bit more those implementations can confirm this. > > Note also that I don't think that we have a way in otb to change this > criteria with shark implementation even if there is a way to do this in > shark base class. Perhaps something that could be added to the > SharkMachineLearningModel in the future. > > Regards, > > > 2017-03-27 9:46 GMT+02:00 Nafissa Sfaksi <[email protected] <javascript:>>: > >> Hi, >> With the tool TrainClassifier we can put several parameters but is it >> possible to see which criteria is used for the method? >> I mean the tool use Gini criterion or entropy criterion? >> Thanks for reply >> Nafissa >> >> -- >> -- >> 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. >> > > > > -- > Manuel Grizonnet > -- -- 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.
