Search Contact information
University of Cambridge Home Department of Engineering
University of Cambridge > Engineering Department > Machine Intelligence Lab

Abstract for navaratnam_hierarchical

In Proc. British machine Vision Conference, Sep 2005. Oxford UK

HIERARCHICAL PART-BASED HUMAN BODY POSE ESTIMATION

R. Navaratnam , A. Thayananthan , P. H. S. Torr , R. Cipolla

Sep 2005

This paper addresses the problem of automatic detection and recovery of three-dimensional human body pose from monocular video sequences for HCI applications. We propose a new hierarchical part-based pose estimation method for the upper-body that efficiently searches the high dimensional articulation space. The body is treated as a collection of parts linked in a kinematic structure. Search for configurations of this collection is commenced from the most reliably detectable part. The rest of the parts are searched based on the detected locations of this anchor as they all are kinematically linked. Each part is represented by a set of 2D templates created from a 3D model, hence inherently encoding the 3D joint angles. The tree data structure is exploited to efficiently search through these templates. Multiple hypotheses are computed for each frame. By modelling these with a HMM, temporal coherence of body motion is exploited to find a smooth trajectory of articulation between frames using a modified Viterbi algorithm. Experimental results show that the proposed technique produces good estimates of the human 3D pose on a range of test videos in a cluttered environment.


(ftp:) navaratnam_hierarchical.pdf (http:) navaratnam_hierarchical.pdf

If you have difficulty viewing files that end '.gz', which are gzip compressed, then you may be able to find tools to uncompress them at the gzip web site.

If you have difficulty viewing files that are in PostScript, (ending '.ps' or '.ps.gz'), then you may be able to find tools to view them at the gsview web site.

We have attempted to provide automatically generated PDF copies of documents for which only PostScript versions have previously been available. These are clearly marked in the database - due to the nature of the automatic conversion process, they are likely to be badly aliased when viewed at default resolution on screen by acroread.

© 2005 Cambridge University Engineering Dept
Information provided by milab-maintainer