Part-based motion descriptor image for human action recognition

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摘要

This paper presents a novel and efficient framework for human action recognition based on modeling the motion of human body-parts. Intuitively, a collective understanding of human body-part movements can lead to better understanding and representation of any human action. In this paper, we propose a generative representation of the motion of human body-parts to learn and classify human actions. The proposed representation combines the advantages of both local and global representations, encoding the relevant motion information as well as being robust to local appearance changes. Our work is motivated by the pictorial structures model and the framework of sparse representations for recognition. Human body-part movements are represented efficiently through quantization in the polar space. The key discrimination within each action is efficiently encoded by sparse representation for classification. The proposed framework is evaluated on both the KTH and the UCF Sport action datasets and results compared against several state-of-the-art methods.

论文关键词:Human action recognition,Motion descriptor image,Subspace learning,Principal component analysis,Discriminant analysis,Sparse representation

论文评审过程:Received 19 May 2011, Revised 3 December 2011, Accepted 21 December 2011, Available online 13 January 2012.

论文官网地址:https://doi.org/10.1016/j.patcog.2011.12.028