Affiliation: | 1. Beijing University of Technology, Beijing, China;2. University of British Columbia, Vancouver, Canada;3. UCD School of Computer Science, Dublin, Ireland;1. Computer Vision Center, Edifici O, Campus UAB, Bellaterra (Barcelona) 08193, Catalonia, Spain;2. Department of Mathematics and Informatics, Universitat de Barcelona, Gran Via de les Corts Catalanes, 58508007 Barcelona, Spain |