RT Book, Section T1 Network clustering by graph coloring: An application to astronomical images A1 Zarrazola Rivera, Edwin A1 Montero De Juan, Francisco Javier A1 Yáñez Gestoso, Francisco Javier A1 Gómez De Castro, Ana Inés AB In this paper we propose an efficient and polynomial hierarchical clustering technique for unsupervised classification of items being connected by a graph. The output of this algorithm shows the cluster evolution in a divisive way, in such a way that s soon as two items are included in the same cluster they will join a common cluster until the last iteration, in which all the items belong to a singleton cluster. This output can be viewed as a fuzzy clustering in which for each alpha cut we have a standard cluster of the network. The clustering tool we present in this paper allows a hierarchical clustering of related items avoiding some unrealistic constraints that are quite often assumed in clustering problems. The proposed procedure is applied to a hierarchical segmentation problem in astronomical images. PB IEEE SN 978-1-4577-1676-8 YR 2011 FD 2011 LK https://hdl.handle.net/20.500.14352/45541 UL https://hdl.handle.net/20.500.14352/45541 LA eng DS Docta Complutense RD 9 abr 2025