Embedding Motion and Structure Features for Action Recognition

Xiantong Zhen, Ling Shao, Dacheng Tao, Xuelong Li

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

We propose a novel method to model human actions by explicitly coding motion and structure features that are separately extracted from video sequences. Firstly, the motion template (one feature map) is applied to encode the motion information and image planes (five feature maps) are extracted from the volume of differences of frames to capture the structure information. The Gaussian pyramid and center-surround operations are performed on each of the six obtained feature maps, decomposing each feature map into a set of subband maps. Biologically inspired features are then extracted by successively applying Gabor filtering and max pooling on each subband map. To make a compact representation, discriminative locality alignment is employed to embed the high-dimensional features into a low-dimensional manifold space. In contrast to sparse representations based on detected interest points, which suffer from the loss of structure information, the proposed model takes into account the motion and structure information simultaneously and integrates them in a unified framework; it therefore provides an informative and compact representation of human actions. The proposed method is evaluated on the KTH, the multiview IXMAS, and the challenging UCF sports datasets and outperforms state-of-the-art techniques on action recognition.
Original languageEnglish
Pages (from-to)1182-1190
Number of pages9
JournalIEEE Transactions on Circuits and Systems for Video Technology
Volume23
Issue number7
Early online date16 Jan 2013
DOIs
Publication statusPublished - 1 Jul 2013

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