A Caltech Library Service

Monocular Perception of Biological Motion in Johansson Displays

Song, Yang and Goncalves, Luis and Di Bernardo, Enrico and Perona, Pietro (2001) Monocular Perception of Biological Motion in Johansson Displays. Computer Vision and Image Understanding, 81 (3). pp. 303-327. ISSN 1077-3142. doi:10.1006/cviu.2000.0890.

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item:


Computer perception of biological motion is key to developing convenient and powerful human–computer interfaces. Algorithms have been developed for tracking the body; however, initialization is done by hand. We propose a method for detecting a moving human body and for labeling its parts automatically in scenes that include extraneous motions and occlusion. We assume a Johansson display, i.e., that a number of moving features, some representing the unoccluded body joints and some belonging to the background, are supplied in the scene. Our method is based on maximizing the joint probability density function (PDF) of the position and velocity of the body parts. The PDF is estimated from training data. Dynamic programming is used for calculating efficiently the best global labeling on an approximation of the PDF. Detection is performed by hypothesis testing on the best labeling found. The computational cost is on the order of N^4 where N is the number of features detected. We explore the performance of our method with experiments carried on a variety of periodic and nonperiodic body motions viewed monocularly for a total of approximately 30,000 frames. The algorithm is demonstrated to be accurate and efficient.

Item Type:Article
Related URLs:
URLURL TypeDescription
Perona, Pietro0000-0002-7583-5809
Contact Email
Additional Information:© 2001 Academic Press. Received January 16, 2000; accepted July 29, 2000. The work in this paper was partially published in the Proceedings of ICCV’99 and in the Proceedings of ECCV’00. Funded by the NSF Engineering Research Center for Neuromorphic Systems Engineering (CNSE) at Caltech (NSF9402726) and by an NSF National Young Investigator Award to P.P. (NSF9457618).
Funding AgencyGrant Number
Caltech Center for Neuromorphic Systems Engineering (CNSE)UNSPECIFIED
Issue or Number:3
Record Number:CaltechAUTHORS:20160930-150856065
Persistent URL:
Official Citation:Yang Song, Luis Goncalves, Enrico Di Bernardo, Pietro Perona, Monocular Perception of Biological Motion in Johansson Displays, Computer Vision and Image Understanding, Volume 81, Issue 3, 2001, Pages 303-327, ISSN 1077-3142, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:70722
Deposited By: SWORD User
Deposited On:04 Oct 2016 03:18
Last Modified:11 Nov 2021 04:33

Repository Staff Only: item control page