hello, thank you, yes i actually I work with this payper, but I dont understand why Typical value of alpha is 1.0 , The amplitude thresholdn is 5 · 10−5. The tolerance threshold is 1.0, threshold parameter. A typical value is 25? how this parameters are chosen?
Le mercredi 12 février 2014 19:23:54 UTC+1, milou a écrit : > > Hello, > please I need to understand how to chose the different parameters > (alpha, amplitude threshold, tolerance threshold, distance threshold) for > road extraction; > > "We must also set the alpha parameter of the filter which allows us to > tune the width of the roads we > want to extract. Typical value is 1.0 and should be working in most > situations. > > The amplitude threshold parameter tunes the sensitivity of the > vectorization step. A typical value is > 5 · 10−5. > > > The tolerance threshold tunes the sensitivity of the path simplification > step. Typical value is 1.0. > > The otb::RoadExtractionFilter is able to link path whose ends are near > according to an euclidean > distance criterion. The threshold for this distance to link a path is the > distance threshold > parameter. A typical value is 25." > > thank you very much. > -- -- 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/groups/opt_out.
