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Journal of Electronic Imaging • new

Recognizing human activities using appearance metric feature and kinematics feature
Author(s): Huimin Qian; Jun Zhou; Xinbiao Lu; Xinye Wu
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Paper Abstract

The problem of automatically recognizing human activities from videos through the fusion of the two most important cues, appearance metric feature and kinematics feature, is considered. And a system of two-dimensional (2-D) Poisson equations is introduced to extract the more discriminative appearance metric feature. Specifically, the moving human blobs are first detected out from the video by background subtraction technique to form a binary image sequence, from which the appearance feature designated as the motion accumulation image and the kinematics feature termed as centroid instantaneous velocity are extracted. Second, 2-D discrete Poisson equations are employed to reinterpret the motion accumulation image to produce a more differentiated Poisson silhouette image, from which the appearance feature vector is created through the dimension reduction technique called bidirectional 2-D principal component analysis, considering the balance between classification accuracy and time consumption. Finally, a cascaded classifier based on the nearest neighbor classifier and two directed acyclic graph support vector machine classifiers, integrated with the fusion of the appearance feature vector and centroid instantaneous velocity vector, is applied to recognize the human activities. Experimental results on the open databases and a homemade one confirm the recognition performance of the proposed algorithm.

Paper Details

Date Published: 23 May 2017
PDF: 15 pages
J. Electron. Imaging. 26(3) 033015 doi: 10.1117/1.JEI.26.3.033015
Published in: Journal of Electronic Imaging Volume 26, Issue 3
Show Author Affiliations
Huimin Qian, Hohai Univ. (China)
Jun Zhou, Hohai Univ. (China)
Xinbiao Lu, Hohai Univ. (China)
Xinye Wu, China United Network Communications Corp., Ltd. (China)


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