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Simultaneous joint and object trajectory templates for human activity recognition from 3-D data

Ghodsi, S ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jvcir.2018.08.001
  3. Publisher: Academic Press Inc , 2018
  4. Abstract:
  5. Availability of low-cost range sensors and the development of relatively robust algorithms for the extraction of skeleton joint locations have inspired many researchers to develop human activity recognition methods using 3-D data. In this paper, an effective method for the recognition of human activities from the normalized joint trajectories is proposed. We represent the actions as multidimensional signals and introduce a novel method for generating action templates by averaging the samples in a “dynamic time” sense. Then, in order to deal with the variations in speed and style of performing actions, we warp the samples with action templates by an efficient algorithm and employ wavelet filters to extract meaningful spatiotemporal features. The proposed method is also capable of modeling the human-object interactions, by performing the template generation and temporal warping procedure via the joint and object trajectories simultaneously. Experimental evaluations on several challenging datasets demonstrates the effectiveness of our method compared to the state-of-the-arts as well as its robustness against different sources of noise. © 2018
  6. Keywords:
  7. Action template ; Dynamic time warping (DTW) ; Human activity recognition ; Human object interaction ; RGB-D sensors ; Trajectory-based representation ; Pattern recognition ; Dynamic time warping ; Human-object interaction ; Rgb-d sensors ; Trajectory-based ; Trajectories
  8. Source: Journal of Visual Communication and Image Representation ; Volume 55 , 2018 , Pages 729-741 ; 10473203 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S1047320318301883?via%3Dihub