Image categorization via robust pLSA

doi:10.1016/j.patrec.2009.09.003

CORC > 北京大学 > 信息科学技术学院

	Image categorization via robust pLSA
	Lu, Zhiwu ; Peng, Yuxin ; Ip, Horace H. S.
刊名	pattern recognition letters
	2010
关键词	Image categorization Probabilistic latent semantic analysis Rival penalized competitive learning Ensemble learning LATENT SEMANTIC ANALYSIS MIXTURE-MODELS QUANTIZATION ALGORITHM RPCL
DOI	10.1016/j.patrec.2009.09.003
英文摘要	This paper presents a novel method to give a good initial estimate of the probabilistic latent semantic analysis (pLSA) model using rival penalized competitive learning (RPCL), since the expectation maximization (EM) algorithm used to train the model is sensitive to the initialization. As a generative model from the statistical text literature, pLSA is further applied to the bag-of-words representation for each image in the database. Especially for those images containing multiple object categories (e.g. grass, roads, and buildings), we aim to discover the objects (i.e., latent topics) in an unsupervised way using pLSA. Based on the discovered topics, image categorization is then carried out by ensemble-based support vector machine (SVM). We then find in the experiments that the pLSA model with RPCL initialization followed by ensemble-based SVM categorization is robust to the changes of the visual vocabulary and the number of latent topics. (C) 2009 Elsevier B.V. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000272518000005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Computer Science, Artificial Intelligence; SCI(E); EI; 13; ARTICLE; 1; 36-43; 31
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/161876]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Lu, Zhiwu,Peng, Yuxin,Ip, Horace H. S.. Image categorization via robust pLSA[J]. pattern recognition letters,2010.
APA	Lu, Zhiwu,Peng, Yuxin,&Ip, Horace H. S..(2010).Image categorization via robust pLSA.pattern recognition letters.
MLA	Lu, Zhiwu,et al."Image categorization via robust pLSA".pattern recognition letters (2010).