A pattern based two-stage text classifier

Bijaksana, Moch Arif, Li, Yuefeng, & Algarni, Abdulmohsen (2013) A pattern based two-stage text classifier. Lecture Notes in Computer Science : Machine Learning and Data Mining in Pattern Recognition, 7988, pp. 169-182.

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Abstract

In a classification problem typically we face two challenging issues, the diverse characteristic of negative documents and sometimes a lot of negative documents that are closed to positive documents. Therefore, it is hard for a single classifier to clearly classify incoming documents into classes. This paper proposes a novel gradual problem solving to create a two-stage classifier. The first stage identifies reliable negatives (negative documents with weak positive characteristics). It concentrates on minimizing the number of false negative documents (recall-oriented). We use Rocchio, an existing recall based classifier, for this stage. The second stage is a precision-oriented “fine tuning”, concentrates on minimizing the number of false positive documents by applying pattern (a statistical phrase) mining techniques. In this stage a pattern-based scoring is followed by threshold setting (thresholding). Experiment shows that our statistical phrase based two-stage classifier is promising.

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ID Code: 61989
Item Type: Journal Article
Refereed: Yes
Keywords: Two-stage classification, Text classification, Pattern mining, Scoring, Thresholding
DOI: 10.1007/978-3-642-39712-7_13
ISSN: 0302-9743
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 Springer-Verlag Berlin Heidelberg
Deposited On: 22 Aug 2013 21:45
Last Modified: 26 Aug 2013 02:54

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