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Detecting unusual activity in video

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Hua Zhong, Jianbo Shi, Visontai, M.·2004·Proceedings of the 2004 IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2004. CVPR 2004.

Abstract

We present an unsupervised technique for detecting unusual activity in a large video set using many simple features. No complex activity models and no supervised feature selections are used. We divide the video into equal length segments and classify the extracted features into prototypes, from which a prototype-segment co-occurrence matrix is computed. Motivated by a similar problem in document-keyword analysis, we seek a correspondence relationship between prototypes and video segments which satisfies the transitive closure constraint. We show that an important sub-family of correspondence functions can be reduced to co-embedding prototypes and segments to N-D Euclidean space. We prove that an efficient, globally optimal algorithm exists for the co-embedding problem. Experiments on various real-life videos have validated our approach.

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Research works printed but not linked: 15

  1. 10.1109/CVPR.2001.990935 · DOI · Paper page
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  15. 10.1101/gr.648603 · DOI · Paper page

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Metadata

Authors
Zhong, H., Shi, J., & Visontai, M.
Venue
Proceedings of the 2004 IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2004. CVPR 2004.
Publisher
IEEE
Published
2004-11-12
Volume
2
Pages
819-826
ISSN
1063-6919 (ISSN-L)
OpenAlex
W2124658620
Cited by
495
References
0
FWCI
17.78
Type
conference paper
Language
en
Open access
green

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CoChat. (2026). Citation check: Detecting unusual activity in video. https://app.cochat.ai/papers/10.1109/cvpr.2004.1315249
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Zhong, H., Shi, J., & Visontai, M. (2004). Detecting unusual activity in video. Proceedings of the 2004 IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2004. CVPR 2004. https://doi.org/10.1109/cvpr.2004.1315249

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