Learning local factor analysis versus mixture of factor analyzers with automatic model selection | |
Shi, Lei1; Liu, Zhi-Yong2; Tu, Shikui1; Xu, Lei1 | |
刊名 | NEUROCOMPUTING |
2014-09-02 | |
卷号 | 139页码:3-14 |
关键词 | Automatic model selection Mixture of factor analyzers Local factor analysis Variational Bayes Bayesian Ying-Yang Dirichlet-Normal-Gamma |
英文摘要 | Considering Factor Analysis (FA) for each component of Gaussian Mixture Model (GMM), clustering and local dimensionality reduction can be addressed simultaneously by Mixture of Factor Analyzers (MFA) and Local Factor Analysis (LFA), which correspond to two FA parameterizations, respectively. This paper investigates the performance of Variational Bayes (VB) and Bayesian Ying-Yang (BYY) harmony learning on MFA/LFA for the problem of automatically determining the component number and the local hidden dimensionalities (i.e., the number of factors of FA in each component). Similar to the existing VB learning algorithm on MFA, we develop an alternative VB algorithm on LFA with a similar conjugate Dirichlet-Normal-Gamma (DNG) prior on all parameters of LFA. Also, the corresponding BYY algorithms are developed for MFA and LFA. A wide range of synthetic experiments shows that LFA is superior to MFA in model selection under either VB or BYY, while BYY outperforms VB reliably on both MFA and LFA. These empirical findings are consistently observed from real applications on not only face and handwritten digit images clustering, but also unsupervised image segmentation. (C) 2014 Elsevier B.V. All rights reserved. |
WOS标题词 | Science & Technology ; Technology |
类目[WOS] | Computer Science, Artificial Intelligence |
研究领域[WOS] | Computer Science |
关键词[WOS] | IMAGE SEGMENTATION ; EM ALGORITHM |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000337661800002 |
内容类型 | 期刊论文 |
源URL | [http://ir.ia.ac.cn/handle/173211/3037] |
专题 | 自动化研究所_复杂系统管理与控制国家重点实验室_机器人应用与理论组 |
作者单位 | 1.Chinese Univ Hong Kong, Dept Comp Sci & Engn, Shatin, Hong Kong, Peoples R China 2.Chinese Acad Sci, Inst Automat, State Key Lab Management & Control Complex Syst, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Shi, Lei,Liu, Zhi-Yong,Tu, Shikui,et al. Learning local factor analysis versus mixture of factor analyzers with automatic model selection[J]. NEUROCOMPUTING,2014,139:3-14. |
APA | Shi, Lei,Liu, Zhi-Yong,Tu, Shikui,&Xu, Lei.(2014).Learning local factor analysis versus mixture of factor analyzers with automatic model selection.NEUROCOMPUTING,139,3-14. |
MLA | Shi, Lei,et al."Learning local factor analysis versus mixture of factor analyzers with automatic model selection".NEUROCOMPUTING 139(2014):3-14. |
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