An Evaluation of Dimension Reduction Techniques for One-Class Classification

Files in This Item:
 File SizeFormat
DownloadUCD-CSI-2007-9.pdf336.3 kBAdobe PDF
Title: An Evaluation of Dimension Reduction Techniques for One-Class Classification
Authors: Villalba, Santiago D.Cunningham, Pádraig
Permanent link: http://hdl.handle.net/10197/12362
Date: 13-Aug-2007
Online since: 2021-07-29T16:28:10Z
Abstract: Dimension reduction (DR) is important in the processing of data in domains such as multimedia or bioinformatics because such data can be of very high dimension. Dimension reduction in a supervised learning context is a well posed problem in that there is a clear objective of discovering a reduced representation of the data where the classes are well separated. By contrast DR in an unsupervised context is ill posed in that the overall objective is less clear. Nevertheless successful unsupervised DR techniques such as Principal Component Analysis (PCA) exist – PCA has the pragmatic objective of transforming the data into a reduced number of dimensions that still captures most of the variation in the data. While one-class classification falls somewhere between the supervised and unsupervised learning categories, supervised DR techniques appear not to be applicable at all for one-class classification because of the absence of a second class label in the training data. In this paper we evaluate the use of a number of up-to-date unsupervised DR techniques for one-class classification and we show that techniques based on cluster coherence and locality preservation are effective.
Type of material: Technical Report
Publisher: University College Dublin. School of Computer Science and Informatics
Series/Report no.: UCD CSI Technical Reports; UCD-CSI-2007-9
Copyright (published version): 2007 the Authors
Keywords: Dimension reduction techniquesMachine learningOne-class classification
Other versions: https://web.archive.org/web/20080226040105/http:/csiweb.ucd.ie/Research/TechnicalReports.html
Language: en
Status of Item: Not peer reviewed
This item is made available under a Creative Commons License: https://creativecommons.org/licenses/by-nc-nd/3.0/ie/
Appears in Collections:Computer Science and Informatics Technical Reports

Show full item record

Page view(s)

34
Last Week
4
Last month
14
checked on Sep 20, 2021

Download(s)

13
checked on Sep 20, 2021

Google ScholarTM

Check


If you are a publisher or author and have copyright concerns for any item, please email research.repository@ucd.ie and the item will be withdrawn immediately. The author or person responsible for depositing the article will be contacted within one business day.