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Local descriptors for spatio-temporal recognition
KTH, School of Computer Science and Communication (CSC), Computer Vision and Active Perception, CVAP.
KTH, School of Computer Science and Communication (CSC), Computer Vision and Active Perception, CVAP.ORCID iD: 0000-0002-9081-2170
2006 (English)In: Spatial Coherence For Visual Motion Analysis: First International Workshop, SCVMA 2004, Prague, Czech Republic, May 15, 2004. Revised Papers / [ed] MacLean, WJ, Springer Berlin/Heidelberg, 2006, Vol. 3667, 91-103 p.Conference paper (Refereed)
Abstract [en]

This paper presents and investigates a set of local space-time descriptors for representing and recognizing motion patterns in video. Following the idea of local features in the spatial domain, we use the notion of space-time interest points and represent video data in terms of local space-time events. To describe such events, we define several types of image descriptors over local spatio-temporal neighborhoods and evaluate these descriptors in the context of recognizing human activities. In particular, we compare motion representations in terms of spatio-temporal jets, position dependent histograms, position independent histograms, and principal component analysis computed for either spatio-temporal gradients or optic flow. An experimental evaluation on a video database with human actions shows that high classification performance can be achieved, and that there is a clear advantage of using local position dependent histograms, consistent with previously reported findings regarding spatial recognition.

Place, publisher, year, edition, pages
Springer Berlin/Heidelberg, 2006. Vol. 3667, 91-103 p.
, Lecture Notes in Computer Science, ISSN 0302-9743 ; 3667
Keyword [en]
Human Movement, Representation
National Category
Computer and Information Science
URN: urn:nbn:se:kth:diva-41720DOI: 10.1007/11676959_8ISI: 000237244700008ScopusID: 2-s2.0-33745757308ISBN: 3-540-32533-6OAI: diva2:445261
1st International Workshop on Spatial Coherence for Visual Motion Analysis, SCVMA 2004; Prague; 15 May 2004 through 15 May 2004

QC 20111003

Available from: 2013-04-22 Created: 2011-09-30 Last updated: 2013-04-22Bibliographically approved

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