A Caltech Library Service

Human Action Recognition By Sequence of Movelet Codewords

Feng, Xiaolin and Perona, Pietro (2002) Human Action Recognition By Sequence of Movelet Codewords. In: First International Symposium on 3D Data Processing, Visualization and Transmission. IEEE , Los Alamitos, CA, pp. 717-721. ISBN 0-7695-1522-3.

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

Use this Persistent URL to link to this item:


An algorithm for the recognition of human actions in image sequences is presented. The algorithm consists of 3 stages: background subtraction, body pose classification, and action recognition. A pose is represented in space-time, called 'movelet'. A movelet is a collection of the shape, motion and occlusion of image patches corresponding to the main parts of the body. The (infinite) set of all possible movelets is quantized into codewords obtained by the vector quantization. For every pair of frames each codeword is assigned a probability. Recognition is performed by simultaneously estimating the most likely sequence of codewords and the action that took place in a sequence. This is done using hidden Markov models. Experiments on the recognition of 3 periodic human actions, each under 3 different viewpoints, and 8 non-periodic human actions, are presented. Training and testing are performed on different subjects with encouraging results. The influence of the number of codewords on the algorithm performance is studied.

Item Type:Book Section
Related URLs:
Perona, Pietro0000-0002-7583-5809
Additional Information:© 2002 IEEE. Date of Current Version: 07 November 2002.
Other Numbering System:
Other Numbering System NameOther Numbering System ID
INSPEC Accession Number7396051
Record Number:CaltechAUTHORS:20111102-115156247
Persistent URL:
Official Citation:Xiaolin Feng; Perona, P.; , "Human action recognition by sequence of movelet codewords," 3D Data Processing Visualization and Transmission, 2002. Proceedings. First International Symposium on , vol., no., pp. 717- 721, 2002 doi: 10.1109/TDPVT.2002.1024148 URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:27587
Deposited By: Ruth Sustaita
Deposited On:03 Nov 2011 02:34
Last Modified:03 Oct 2019 03:24

Repository Staff Only: item control page