A generalized cluster centroid based classifier for text categorization |
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| Authors: | Guansong Pang Shengyi Jiang |
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| Institution: | 1. School of Management, Guangdong University of Foreign Studies, Guangzhou 510006, PR China;2. School of Informatics, Guangdong University of Foreign Studies, Guangzhou 510420, PR China |
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| Abstract: | In this paper, a Generalized Cluster Centroid based Classifier (GCCC) and its variants for text categorization are proposed by utilizing a clustering algorithm to integrate two well-known classifiers, i.e., the K-nearest-neighbor (KNN) classifier and the Rocchio classifier. KNN, a lazy learning method, suffers from inefficiency in online categorization while achieving remarkable effectiveness. Rocchio, which has efficient categorization performance, fails to obtain an expressive categorization model due to its inherent linear separability assumption. Our proposed method mainly focuses on two points: one point is that we use a clustering algorithm to strengthen the expressiveness of the Rocchio model; another one is that we employ the improved Rocchio model to speed up the categorization process of KNN. Extensive experiments conducted on both English and Chinese corpora show that GCCC and its variants have better categorization ability than some state-of-the-art classifiers, i.e., Rocchio, KNN and Support Vector Machine (SVM). |
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| Keywords: | Text categorization KNN Rocchio Clustering Generalized cluster centroid |
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