Hi Linfeng, the surface probably leads to degenerate Voronoi polygons somewhere in the smaller branches. Try smoothing the surface first, using vmtksurfacesmoothing -ifile airway.vtp -passband 0.01 -iterations 30 -ofile airway_smooth.vtp
maybe try with -passband 0.1 if the smoothing is too strong with 0.01. I also suggest to get rid of the disconnected segments using vmtksurfaceconnectivity. You can do everything in a single pipe vmtksurfaceconnectivity -ifile airway.vtp --pipe vmtksurfacesmoothing -passband 0.01 -iterations 30 --pipe vmtkcenterlines -ofile airway_centerlines.vtp Let me know if this helps. Luca On Dec 22, 2011, at 4:29 PM, Lingfeng Zhuang wrote: > Hi > > I am trying to extract centerline for the polydata attached. But after > picking start point and end points, the program did not return in two > hours. Python took 100% CPU usage in this period. > > The command used is vmtkcenterlines -ifile airway.vtp -ofile > foo_centerlines.vtp > > Please help. > > Best regards, > > Jerry > <airway.vtp><endpoints.JPG><startpoints.JPG>------------------------------------------------------------------------------ > Write once. Port to many. > Get the SDK and tools to simplify cross-platform app development. Create > new or port existing apps to sell to consumers worldwide. Explore the > Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join > http://p.sf.net/sfu/intel-appdev_______________________________________________ > vmtk-users mailing list > vmtk-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/vmtk-users ------------------------------------------------------------------------------ Write once. Port to many. Get the SDK and tools to simplify cross-platform app development. Create new or port existing apps to sell to consumers worldwide. Explore the Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join http://p.sf.net/sfu/intel-appdev _______________________________________________ vmtk-users mailing list vmtk-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/vmtk-users
