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Title: Localized multiple kernel learning for realistic human action recognition in videos
Authors: Song, Y.
Zheng, Y.-T.
Tang, S.
Zhou, X.
Zhang, Y.
Lin, S.
Chua, T.-S. 
Keywords: Action recognition
localized classifier
multiple kernel learning
Issue Date: 2011
Citation: Song, Y., Zheng, Y.-T., Tang, S., Zhou, X., Zhang, Y., Lin, S., Chua, T.-S. (2011). Localized multiple kernel learning for realistic human action recognition in videos. IEEE Transactions on Circuits and Systems for Video Technology 21 (9) : 1193-1202. ScholarBank@NUS Repository.
Abstract: Realistic human action recognition in videos has been a useful yet challenging task. Video shots of same actions may present huge intra-class variations in terms of visual appearance, kinetic patterns, video shooting, and editing styles. Heterogeneous feature representations of videos pose another challenge on how to effectively handle the redundancy, complementariness and disagreement in these features. This paper proposes a localized multiple kernel learning (L-MKL) algorithm to tackle the issues above. L-MKL integrates the localized classifier ensemble learning and multiple kernel learning in a unified framework to leverage the strengths of both. The basis of L-MKL is to build multiple kernel classifiers on diverse features at subspace localities of heterogeneous representations. L-MKL integrates the discriminability of complementary features locally and enables localized MKL classifiers to deliver better performance in its own region of expertise. Specifically, L-MKL develops a locality gating model to partition the input space of heterogeneous representations to a set of localities of simpler data structure. Each locality then learns its localized optimal combination of Mercer kernels of heterogeneous features. Finally, the gating model coordinates the localized multiple kernel classifiers globally to perform action recognition. Experiments on two datasets show that the proposed approach delivers promising performance. © 2011 IEEE.
Source Title: IEEE Transactions on Circuits and Systems for Video Technology
ISSN: 10518215
DOI: 10.1109/TCSVT.2011.2130230
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