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TDM modeling and evaluation of different domain transforms for LSI

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Jaber, T, Amira, A and Milligan, P (2009) TDM modeling and evaluation of different domain transforms for LSI. NEUROCOMPUTING, 72 (10-12, Sp. Iss. SI). pp. 2406-2417. [Journal article]

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DOI: 10.1016/j.neucom.2008.12.010

Abstract

Latent semantic indexing (LSI) is a popular technique used in information retrieval (IR) applications. This paper presents a novel evaluation strategy based on the use of image processing tools. The authors evaluate the use of the discrete cosine transform (DCT) and Cohen Daubechies Feauveau 9/7 (CDF9/7) wavelet transform as a preprocessing step for the singular value decomposition (SVD) step of the LSI system. In addition, the effect of different threshold types on the search results is examined. The results show that accuracy can be increased by applying both transforms as a preprocessing step, with better performance for the hard-threshold function. The choice of the best threshold value is a key factor in the transform process. This paper also describes the most effective structure for the database to facilitate efficient searching in the LSI system. (c) 2009 Elsevier B.V. All rights reserved.

Item Type:Journal article
Keywords:Latent semantic indexing; Information retrieval; Discrete cosine transform; Singular value decomposition; Cohen Daubechies Feauveau 9/7; Hard thresholding; Soft thresholding
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:13399
Deposited By:Dr Abbes Amira
Deposited On:02 Jun 2010 09:27
Last Modified:14 Apr 2014 10:03

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