作者 | WEN LU School of Electronic Engineering, Xidian University, Xi'an 710071, P. R. China State Key Lab of Integrated Service Networks, Xidian University, Xi'an 710071, P. R. China XINBO GAO School of Electronic Engineering, Xidian University, Xi'an 710071, P. R. China State Key Lab of Integrated Service Networks, Xidian University, Xi'an 710071, P. R. China DACHENG TAO Biometrics Research Centre, Department of Computing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong XUELONG LI School of Computer Science and Information Systems, Birkbeck College, University of London, London WC1E 7HX, UK |