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  • Mehran Khodabandeh, MSc Thesis Defence, Computing Science
    10:00 AM - 12:00 PM
    January 7, 2015
    M.SC. THESIS DEFENCE Mehran Khodabandeh Bachelor of Science at Sharif University of Technology, Iran, 2012 Wednesday, January 7 th , 2015 10:00 a.m. TASC1 9204 West Title DISCOVERING HUMAN INTERACTIONS IN VIDEOS WITH LIMITED DATA LABELING Abstract We present a novel approach for discovering human interactions in videos. Activity understanding techniques usually require a large number of labeled examples, which are not available in many practical cases. Here, we focus on re-covering semantically meaningful clusters of human-human and human-object interaction in an unsupervised fashion. A new iterative solution is introduced based on Maximum Margin Clustering (MMC), which also accepts user feed-back to refine clusters. This is achieved by formulating the whole process as a unified constrained latent max-margin clustering problem. Extensive experiments have been carried out over three challenging datasets, Collective Activity, VIRAT, and UT-interaction. Empirical results demonstrate that the proposed algorithm can efficiently discover perfect semantic clusters of human interactions with only a small amount of labeling effort. Keywords: Clustering; Human interactions; Video; Maximum Margin; User feedback M.Sc. Examining Committee: Dr. Greg Mori, Senior Supervisor Dr. Ze-Nian Li, Supervisor Dr. Ping Tan, Examiner Dr. Ghassan Hamarneh, Chair
  • John Mayer, MSc Thesis Defence, Earth Sciences
    2:00 PM - 5:00 PM
    January 7, 2015
    Title: Applications of uncertainty theory to rock mechanics and geotechnical mine design For further information please contact the Graduate secretary at eascgsec@sfu.ca
  • Kristen Gorman, PhD Thesis Defence, Biological Sciences
    9:30 AM - 1:30 PM
    January 8, 2015
    Senior Supervisor: Dr. Tony Williams Thesis Title: Integrative Studies of Southern Ocean Food-Webs and Pygoscelis Penguin Demography: Mechanisms of Population Response to Environmental Change
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