Paper in IEEE CVPR 2013 “Augmenting Bag-of-Words: Data-Driven Discovery of Temporal and Structural Information for Activity Recognition”

June 27th, 2013 Irfan Essa Posted in Activity Recognition, Behavioral Imaging, Grant Schindler, PAMI/ICCV/CVPR/ECCV, Papers, Sports Visualization, Thomas Ploetz, Vinay Bettadapura No Comments »

  • V. Bettadapura, G. Schindler, T. Ploetz, and I. Essa (2013), “Augmenting Bag-of-Words: Data-Driven Discovery of Temporal and Structural Information for Activity Recognition,” in Proceedings of IEEE Conference on Computer Vision and Pattern Recognition (CVPR), 2013. [PDF] [WEBSITE] [DOI] [arXiv] [BIBTEX]
    @InProceedings{    2013-Bettadapura-ABDDTSIAR,
      arxiv    = {http://arxiv.org/abs/1510.02071},
      author  = {Vinay Bettadapura and Grant Schindler and Thomas
          Ploetz and Irfan Essa},
      booktitle  = {{Proceedings of IEEE Conference on Computer Vision
          and Pattern Recognition (CVPR)}},
      doi    = {10.1109/CVPR.2013.338},
      month    = {June},
      organization  = {IEEE Computer Society},
      pdf    = {http://www.cc.gatech.edu/~irfan/p/2013-Bettadapura-ABDDTSIAR.pdf},
      title    = {Augmenting Bag-of-Words: Data-Driven Discovery of
          Temporal and Structural Information for Activity
          Recognition},
      url    = {http://www.cc.gatech.edu/cpl/projects/abow/},
      year    = {2013}
    }

Abstract

We present data-driven techniques to augment Bag of Words (BoW) models, which allow for more robust modeling and recognition of complex long-term activities, especially when the structure and topology of the activities are not known a priori. Our approach specifically addresses the limitations of standard BoW approaches, which fail to represent the underlying temporal and causal information that is inherent in activity streams. In addition, we also propose the use of randomly sampled regular expressions to discover and encode patterns in activities. We demonstrate the effectiveness of our approach in experimental evaluations where we successfully recognize activities and detect anomalies in four complex datasets.

via IEEE Xplore – Augmenting Bag-of-Words: Data-Driven Discovery of Temporal and Structural Information for Activity R….

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AT UBICOMP 2012 Conference, in Pittsburgh, PA, September 5 – 7, 2012

September 4th, 2012 Irfan Essa Posted in Edison Thomaz, Grant Schindler, Gregory Abowd, Papers, Presentations, Thomas Ploetz, UBICOMP, Ubiquitous Computing, Vinay Bettadapura No Comments »

At ACM sponsored, 14th International Conference on Ubiquitous Computing (Ubicomp 2012), Pittsburgh, PA, September 5 – 7, 2012.

Here are the highlights of my group’s participation in Ubicomp 2012.

  • E. Thomaz, V. Bettadapura, G. Reyes, M. Sandesh, G. Schindler, T. Ploetz, G. D. Abowd, and I. Essa (2012), “Recognizing Water-Based Activities in the Home Through Infrastructure-Mediated Sensing,” in Proceedings of ACM International Conference on Ubiquitous Computing (UBICOMP), 2012. [PDF] [WEBSITE] (Oral Presentation at 2pm on Wednesday September 5, 2012).
  • J. Wang, G. Schindler, and I. Essa (2012), “Orientation Aware Scene Understanding for Mobile Camera,” in Proceedings of ACM International Conference on Ubiquitous Computing (UBICOMP), 2012. [PDF][WEBSITE] (Oral Presentation at 2pm on Thursday September 6, 2012).

In addition, my colleague, Gregory Abowd has a position paper on “What next, Ubicomp? Celebrating an intellectual disappearing act” on Wednesday 11:15am session and my other colleague/collaborator Thomas Ploetz has a paper on “Automatic Assessment of Problem Behavior in Individuals with Developmental Disabilities” with his co-authors Nils Hammerla, Agata Rozga, Andrea Reavis, Nathan Call, Gregory Abowd on Friday September 6, in the 9:15am session.

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