Hi, The paper describing this algorithm can be found here: http://www.melaneum.com/documents/EChristophe-ICIP2007.pdf
> "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. > alpha = width of the roads in pixels > The amplitude threshold parameter tunes the sensitivity of the vectorization > step. A typical value is > 5 · 10−5. > --> threshold for the detection after "gradient computation" (fig. 3 in the paper) > The tolerance threshold tunes the sensitivity of the path simplification > step. Typical value is 1.0. > --> used to smooth the polylines (fig. 5 in the paper) > 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." > the value of d in figure 6. Jordi > 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 > otb-users-/[email protected] > To unsubscribe from this group, send email to > otb-users+unsubscribe-/[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 > otb-users+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/[email protected] > For more options, visit https://groups.google.com/groups/opt_out. -- -- 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.
