Supervised learning probabilistic latent semantic analysis for human motion analysis

Journal article


Wang, Jin, Liu, Ping, She, Mary F. H., Kouzani, Abbas and Nahavandi, Saeid. (2013). Supervised learning probabilistic latent semantic analysis for human motion analysis. Neurocomputing. 100, pp. 134 - 143. https://doi.org/10.1016/j.neucom.2011.10.033
AuthorsWang, Jin, Liu, Ping, She, Mary F. H., Kouzani, Abbas and Nahavandi, Saeid
Abstract

Latent topic models such as Latent Dirichlet Allocation (LDA) and probabilistic Latent Semantic Analysis (pLSA) have demonstrated success in computer vision tasks. Most existing approaches train LDA and pLSA in an unsupervised manner, where the training data does not include any class label information. However, the class labels in training data are very important for the task of classification. In this paper, we propose to train a pLSA model in a supervised manner for the task of human motion analysis using the bag-of-words representation. Each frame in a video is treated as a word, and all the frames in the training videos are clustered to construct a codebook. The class label information is used to learn the pLSA model in a supervised manner, which not only makes the training more efficient, but also improves the overall recognition accuracy significantly. In addition, we employ the pyramid Histogram of orientation Gradient (HoG) to encode a human figure in each frame. The pyramid HoG descriptor does not require extraction of silhouettes, and is invariant to translations and rotations to some extent. The method is validated using two standard datasets. The experimental results show that our method can accurately recognize human motion in video sequences. Moreover, the overall recognition accuracy is rather stable with respect to the codebook size.

Keywordsmotion analysis; pyramid fog; plsa; supervised learning
Year2013
JournalNeurocomputing
Journal citation100, pp. 134 - 143
PublisherElsevier B.V.
ISSN0925-2312
Digital Object Identifier (DOI)https://doi.org/10.1016/j.neucom.2011.10.033
Scopus EID2-s2.0-84868610534
Page range134 - 143
Research GroupInstitute for Learning Sciences and Teacher Education (ILSTE)
Publisher's version
File Access Level
Controlled
Place of publicationNetherlands
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