Hi all, I have the same questions. I would really appreciate if anyone could help us.
Many thanks, Thayse Nery On Tuesday, June 2, 2015 at 11:37:09 PM UTC+8, loïc DUTRIEUX wrote: > > Hi all, > > I´d like to ask two clarifications about the mean shift segmentation > implemented in OTB. I was not able to find these in the doc. > > 1 - What distance metric does the range radius parameter uses when working > with multiple bands? Is it euclidean distance by default? > > So to further clarify how this works, if I have the following three pixels > with associated values. > > | band | Pixel 1 | Pixel 2 | Pixel 3 | > | band1 | 50 | 55 | 100 | > | band2 | 34 | 30 | 35 | > | band3 | 60 | 56 | 60 | > > The euclidean distance between the pairs is the following. > > | Pair | Distance | > | 1-2 | 7.5 | > | 1-3 | 50 | > | 2-3 | 45 | > > If I set a range radius of let's say 15, which is <<45 and >>7.5, does > that mean that Pixels 1 and 2 will be made the same value and Pixel 3 will > be another value (assuming they are all within the same spatial radius). > > > 2 - My second question. What is the unit of the spatial radius? I'm > assuming pixels, but I'd appreciate confirmation. > > The reason I am using the segmentation is that I'm trying to delineate > areas of similar land use history using time-series of Landsat vegetation > indices as input. > > Thanks in advance for your help, > Cheers, > > --- > Loïc Dutrieux > Wageningen University > The Netherlands > -- -- 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.
