Plugin cloud Compare CANUPO. The CANUPO suite is a simple yet efficient way to automatically classify a point cloud. It lets you create your own classifiers (by training them on small samples) and/or apply one classifier at a time on a point cloud so as to separate it into two subsets. It also outputs a classification confidence value for each point so that you can quickly identify the problematic cases (generally on the classes borders).
Classification Image CloudCompare
http://www.cloudcompare.org/doc/wiki/index.php?title=CANUPO_(plugin)