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General Information
Editor-in-chief
Prof. Wael Badawy
Department of Computing and Information Systems Umm Al Qura University, Canada
I'm happy to take on the position of editor in chief of IJCTE. We encourage authors to submit papers concerning any branch of computer theory and engineering.
IJCTE 2014 Vol.6(1): 9-14 ISSN: 1793-8201
DOI: 10.7763/IJCTE.2014.V6.827

On the Problem of Modeling Structured Data with the MinSOD Representative

Guido Del Vescovo, Lorenzo Livi, Fabio Massimo Frattale Mascioli, and Antonello Rizzi
Abstract—The possibility to face pattern recognition problems directly on structured domains (e.g., multimedia data, strings, graphs) is fundamental to the effective solution of many interesting applications. In this paper, we deal with a clustering problem defined in the string domain, focusing on the problem of cluster representation in data domains where only a dissimilarity measure can be fixed. To this aim, we adopt the MinSOD (Minimum Sum of Distances) cluster representation technique, which defines the representative as the element of the cluster minimizing the sum of dissimilarities from all the other elements in the considered set. Since the precise computation of the MinSOD have a high computational cost, we propose a suboptimal procedure consisting in computing the representative of the cluster considering only a reduced pool of samples, instead of the whole set of objects in the cluster. We have carried out some tests in order to ascertain the sensitivity of the clustering procedure with respect to the number of samples in the pool used to compute the MinSOD. Results show a good robustness of the proposed procedure. The implementations are available as part of the SPARE library, which is available as an open source project.

Index Terms—Clustering strings, MinSOD representative, software library.

The authors are with Department of Information Engineering, Electronics and Telecommunications, SAPIENZA University of Rome, Via Eudossiana 18, 00184 Rome, Italy (e-mail: delvescovo, livi@diet.uniroma1.it, antonello.rizzi@uniroma1.it, mascioli@infocom.uniroma1.it).

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Cite:Guido Del Vescovo, Lorenzo Livi, Fabio Massimo Frattale Mascioli, and Antonello Rizzi, "On the Problem of Modeling Structured Data with the MinSOD Representative," International Journal of Computer Theory and Engineering vol. 6, no. 1, pp. 9-14, 2014.

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