Computer vision in human-computer interaction : ECCV 2006 Workshop on HCI, Graz, Austria, May 13, 2006 : proceedings - ECCV Workshop on HCI; Huang, Thomas S.; Sebe, Nicu; Lew, Michael S.; Pavlović, Vladimir; Kölsch, Mathias; Galata, Aphrodite; Kisačanin, Vranislav (Lecture notes in computer science, 2006)