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Discriminative optical flow tensor for video semantic analysis

Gao, X. and Yang, Y. and Tao, D. and Li, Xuelong (2009) Discriminative optical flow tensor for video semantic analysis. Computer Vision and Image Understanding 113 (3), pp. 372-383. ISSN 1077-3142.

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Official URL: http://dx.doi.org/10.1016/j.cviu.2008.08.007

Abstract

This paper presents a novel framework for effective video semantic analysis. This framework has two major components, namely, optical flow tensor (OFT) and hidden Markov models (HMMs). OFT and HMMs are employed because: (1) motion is one of the fundamental characteristics reflecting the semantic information in video, so an OFT-based feature extraction method is developed to make full use of the motion information. Thereafter, to preserve the structure and discriminative information presented by OFT, general tensor discriminant analysis (GTDA) is used for dimensionality reduction. Finally, linear discriminant analysis (LDA) is utilized to further reduce the feature dimension for discriminative motion information representation; and (2) video is a sort of information intensive sequential media characterized by its context-sensitive nature, so the video sequences can be more effectively analyzed by some temporal modeling tools. In this framework, we use HMMs to well model different levels of semantic units (SU), e.g., shot and event. Experimental results are reported to demonstrate the advantages of the proposed framework upon semantic analysis of basketball video sequences, and the cross validations illustrate its feasibility and effectiveness.

Item Type: Article
Keyword(s) / Subject(s): Optical flow tensor, video semantic analysis, general tensor discriminant analysis, linear discriminant analysis, hidden Markov models
School or Research Centre: Birkbeck Schools and Research Centres > School of Business, Economics & Informatics > Computer Science and Information Systems
Depositing User: Administrator
Date Deposited: 07 Feb 2011 12:09
Last Modified: 17 Apr 2013 12:18
URI: http://eprints.bbk.ac.uk/id/eprint/1855

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