If the size of a K-th
cluster is smaller than the maximum size as Fig. 4(a), and a
new data is added which makes the cluster size bigger than
the maximum size as Fig. 4(b), the number of clusters
increases to make all sizes of clusters smaller than the
maximum size like in Fig. 4(c).
All humans or objects around a robot were detected by this
method regardless of the number of them, and the variable
number of the clusters allowed for addition and the deletion
of clusters in the dynamic environment. The mean value of
the data (r୲) and the center data (θ୲) in the detected cluster are
compose the position (2) of the cluster as Fig 5.