Hi Bill, <br>thank you for your tip, as I understood from code only treshold part of vtkPolyDataConnectivityFilter could be used for segmentation using: <br>SetRange and SetScalarConnectivityOn). Did you mean this combination ?<br>
Treshold sementation is possible only if scalar ranges are known, i do not know them. I am looking for some algorithm based on region growing,edge detection, split-and merge, waterfall (<a href="http://en.wikipedia.org/wiki/Segmentation_%28image_processing%29">http://en.wikipedia.org/wiki/Segmentation_%28image_processing%29</a>) or other 'shape' segmenting algorithm for polydata that could be used for segment mesh into 'smooth' (having relative curvature within region under some treshold) surfaces /regions/.<br>
<br>I did not see such kind of algorithm in vtk, but I would like be sure. <br> <br>Best regards, <br>Jana<br><br><br><br><br>