Minh-Chinh Nguyen Volker Graefe Using Available Potentials of Vision-Based Robots by Converting Passive Watching into Active Seeing. 1-4 2002 MVA http://b2.cvl.iis.u-tokyo.ac.jp/mva/proceedings/CommemorativeDVD/2002/papers/2002001.pdf conf/mva/2002 db/conf/mva/mva2002.html#NguyenG02