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- W2336675855 abstract "This paper aims to enhance the bag of features in order to improve the accuracy of human activity recognition. In this paper, human activity recognition process consists of four stages: local space time features detection, feature description, bag of features representation, and SVMs classification. The k-means step in the bag of features is enhanced by applying three levels of clustering: clustering per video, clustering per action class, and clustering for the final code book. The experimental results show that the proposed method of enhancement reduces the time and memory requirements, and enables the use of all training data in the k-means clustering algorithm. The evaluation of accuracy of action classification on two popular datasets (KTH and Weizmann) has been performed. In addition, the proposed method improves the human activity recognition accuracy by 5.57% on the KTH dataset using the same detector, descriptor, and classifier." @default.
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- W2336675855 date "2016-07-01" @default.
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- W2336675855 title "Enhanced bag of words using multilevel k -means for human activity recognition" @default.
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- W2336675855 doi "https://doi.org/10.1016/j.eij.2015.11.002" @default.
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