CONF Chen_ICCV-SISM_2011/IDIAP A Joint Estimation of Head and Body Orientation Cues in Surveillance Video Chen, Cheng Heili, Alexandre Odobez, Jean-Marc EXTERNAL https://publications.idiap.ch/attachments/papers/2011/Chen_ICCV-SISM_2011.pdf PUBLIC IEEE International Workshop on Socially Intelligent Surveillance and Monitoring 2011