Rough set based generalized fuzzy c-means algorithm and quantitative indices

IEEE Transactions on Systems, Man, and Cybernetics. Part B, Cybernetics : a Publication of the IEEE Systems, Man, and Cybernetics Society
Pradipta Maji, Sankar K Pal

Abstract

A generalized hybrid unsupervised learning algorithm, which is termed as rough-fuzzy possibilistic c-means (RFPCM), is proposed in this paper. It comprises a judicious integration of the principles of rough and fuzzy sets. While the concept of lower and upper approximations of rough sets deals with uncertainty, vagueness, and incompleteness in class definition, the membership function of fuzzy sets enables efficient handling of overlapping partitions. It incorporates both probabilistic and possibilistic memberships simultaneously to avoid the problems of noise sensitivity of fuzzy c-means and the coincident clusters of PCM. The concept of crisp lower bound and fuzzy boundary of a class, which is introduced in the RFPCM, enables efficient selection of cluster prototypes. The algorithm is generalized in the sense that all existing variants of c-means algorithms can be derived from the proposed algorithm as a special case. Several quantitative indices are introduced based on rough sets for the evaluation of performance of the proposed c-means algorithm. The effectiveness of the algorithm, along with a comparison with other algorithms, has been demonstrated both qualitatively and quantitatively on a set of real-life data sets.

References

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Aug 15, 2006·IEEE Transactions on Systems, Man, and Cybernetics. Part B, Cybernetics : a Publication of the IEEE Systems, Man, and Cybernetics Society·Sushmita MitraWitold Pedrycz
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Citations

Nov 18, 2011·Computer Methods and Programs in Biomedicine·Zexuan JiDagan Feng
Aug 1, 2012·IEEE/ACM Transactions on Computational Biology and Bioinformatics·Pradipta Maji, Sushmita Paul
Nov 6, 2009·IEEE Transactions on Systems, Man, and Cybernetics. Part B, Cybernetics : a Publication of the IEEE Systems, Man, and Cybernetics Society·Pradipta Maji, Sankar K Pal
Jun 15, 2010·IEEE Transactions on Systems, Man, and Cybernetics. Part B, Cybernetics : a Publication of the IEEE Systems, Man, and Cybernetics Society·Pradipta Maji
Feb 8, 2011·IEEE Transactions on Systems, Man, and Cybernetics. Part B, Cybernetics : a Publication of the IEEE Systems, Man, and Cybernetics Society·Kadim Tasdemir, Erzsébet Merényi
Oct 16, 2015·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Abhirup Banerjee, Pradipta Maji
May 23, 2015·Molecular BioSystems·Sushmita Paul, Julio Vera
Aug 19, 2015·IEEE Transactions on Neural Networks and Learning Systems·Shubhra Sankar RaySankar K Pal
Apr 1, 2014·Molecular BioSystems·Sushmita Paul, Pradipta Maji
Aug 12, 2017·Journal of Medical Systems·Soma BanerjeeChandan Chakraborty

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