TitleExtracting Places and Activities from GPS Traces Using Hierarchical Conditional Random Fields
Publication TypeJournal Article
Year of Publication2007
AuthorsLiao L, Fox D, Kautz H
JournalInternational Journal of Robotics Research

<p>Learning patterns of human behavior from sensor data is extremely important for high-level activity inference. We show how to extract a person's activities and significant places from traces of GPS data. Our system uses hierarchically structured conditional random fields to generate a consistent model of a person's activities and places. In contrast to existing techniques, our approach takes high-level context into account in order to detect the significant places of a person. Our experiments show significant improvements over existing techniques. Furthermore, they indicate that our system is able to robustly estimate a person's activities using a model that is trained from data collected by other persons.</p>


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Citation KeyLia07Ext