Departmental Papers (CIS)

Date of this Version

May 2002

Document Type

Conference Paper


Copyright 2002 IEEE. Reprinted from Proceedings of the 5th IEEE International Conference on Automatic Face and Gesture Recognition 2002 (FGR 2002), pages 351-356.
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NOTE: At the time of publication, author Jianbo Shi was affiliated with Carnegie Mellon University. Currently (March 2005), he is a faculty member in the Department of Computer and Information Science at the University of Pennsylvania.


Our goal is to establish a simple baseline method for human identification based on body shape and gait. This baseline recognition method provides a lower bound against which to evaluate more complicated procedures. We present a viewpoint dependent technique based on template matching of body silhouettes. Cyclic gait analysis is performed to extract key frames from a test sequence. These frames are compared to training frames using normalized correlation, and subject classification is performed by nearest neighbor matching among correlation scores. The approach implicitly captures biometric shape cues such as body height, width, and body-part proportions, as well as gait cues such as stride length and amount of arm swing. We evaluate the method on four databases with varying viewing angles, background conditions (indoors and outdoors), walk styles and pixels on target.


biometrics (access control), computer vision, correlation methods, gait analysis, image classification, image matching, image motion analysis, image sequences, shape measurement, video databases, arm swing, background conditions, baseline recognition method, biometric shape cues, body height, body shape, body width, body-part proportions, correlation scores, cyclic gait analysis, databases, gait cues, indoor conditions, key frame extraction, lower bound, nearest-neighbor matching, normalized correlation, outdoor conditions, pixels, silhouette-based human identification, stride length, subject classification, template matching, test image sequence, training frames, viewing angles, viewpoint-dependent technique, walking styles



Date Posted: 30 April 2005