Affiliation: | (1) Computer Vision Laboratory, Center for Automation Research, University of Maryland, 20742-3411 College Park, MD;(2) Present address: Dept. of Computer Science, York University, 4700 Keele Str., M3J 1P3 North York, Ontario, Canada;(3) Computer Vision Laboratory, Center for Automation Research, University of Maryland, 20742 College Park, MD |