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Action classification by exploring directional co-occurrence of weighted STIPs

Country : Singapore
Department : Singapore Management University
Project Title : Action classification by exploring directional co-occurrence of weighted STIPs
Researcher : LIU, Mengyuan , LIU, Hong , SUN, Qianru
Keyword : Human action recognition , spatio-temporal interest points , bag-of-words , Computer Engineering , Software Engineering
Publisher : Institutional Knowledge at Singapore Management University
Year End : 2014
Identifier : https://ink.library.smu.edu.sg/sis_research/4463 , https://ink.library.smu.edu.sg/cgi/viewcontent.cgi?article=5466&context=sis_research
Source : Research Collection School Of Information Systems
Abstract / Description :

Human action recognition is challenging mainly due to intro-variety, inter-ambiguity and clutter backgrounds in real videos. Bag-of-visual words model utilizes spatio-temporal interest points(STIPs), and represents action by the distribution of points which ignores visual context among points. To add more contextual information, we propose a method by encoding spatio-temporal distribution of weighted pairwise points. First, STIPs are extracted from an action sequence and clustered into visual words. Then, each word is weighted in both temporal and spatial domains to capture the relationships with other words. Finally, the directional relationships between co-occurrence pairwise words are used to encode visual contexts. We report state-of-the-art results on Rochester and UT-Interaction datasets to validate that our method can classify human actions with high accuracies.

References

LIU, Mengyuan,LIU, Hong and SUN, Qianru. (2014). Action classification by exploring directional co-occurrence of weighted STIPs.  Singapore: Singapore Management University.
LIU, Mengyuan,LIU, Hong and SUN, Qianru. 2014. "Action classification by exploring directional co-occurrence of weighted STIPs".  Singapore: Singapore Management University.
LIU, Mengyuan,LIU, Hong and SUN, Qianru. "Action classification by exploring directional co-occurrence of weighted STIPs."  Singapore: Singapore Management University, 2014. Print.
LIU, Mengyuan,LIU, Hong and SUN, Qianru. Action classification by exploring directional co-occurrence of weighted STIPs. Singapore: Singapore Management University; 2014.

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