"MIRACL-FS, University of Sfax" "Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Science" "Division of Computer Engineering, Chonbuk National University, Jeonju-si, Jeollabuk-do" "The Blavatnik School of Computer Science, The Tel-Aviv University" "Deparment of Computing, Imperial College London, UK" "University of Toronto, 6 Kings College Road, Toronto, ON M5S 3G4 CANADA" "SSN College of Engineering, Kalavakkam, Tamil Nadu, India" "BRIC, University of North Carolina at Chapel Hill, NC 27599, USA" "IIE, Universidad de la Rep ublica, Uruguay. 2ECE, Duke University, USA" "SRM University, Kattankulathur, Chennai-603 203, Tamilnadu, India" "School of Computer Science, University of Birmingham, UK" Stevens Institute of Technology Adobe Systems Inc "College of Computers and Information Systems, Umm Al-Qura University, Makkah, KSA" "ITCS, Institute for Interdisciplinary Information Sciences, Tsinghua University, Beijing" Tomas Bata University in Zl n "School of Computing and Info. Sciences, Florida International University" "Numediart Institute, University of Mons" in the College of Engineering and Computer Science "Pursuing M.Tech, Caarmel Engineering College, MG University, Kerala, India" The University of Queensland in "University Politehnica of Bucharest, Romania, Address Splaiul Independent ei" M. Mark Everingham University of Leeds "CVIP Lab, University of Louisville, Louisville, KY, USA" "School of Psychology, University of Auckland, Auckland, New Zealand" "University of Shef eld, Regent Court, 211 Portobello, Shef eld" "Babes Bolyai University, 58-60 Teodor Mihali, C333, Cluj Napoca" "Faculty of Telecommunications, Technical University, Sofia, Bulgaria" "University of Science, VNU-HCMC, Ho Chi Minh city, Vietnam" "RoboticsResearchGroup, UniversityofOxford, Oxford, UK" "School of Computer Science, Fudan University, Shanghai, China" "BECS, Aalto University, Helsinki, Finland" "Beihang University 2Gri th University 3University of York, UK" "School of Comm. and Info. Engineering, Beijing University of Posts and Telecom., Beijing China" Tsinghua-CUHK Joint Research Center for Media Sciences Sabanc University "Viswajyothi College of Engineering and Technology Kerala, India" "Fudan University, 2Microsoft Research Asia, 3University of Maryland" "School of Computer Science, University of Nottingham" "Advanced Digital Sciences Center (ADSC), University of Illinois at Urbana-Champaign, Singapore" "University at Buffalo, SUNY" "University of Maryland, Center for Automation Research" "MRC Laboratory For Molecular Cell Biology, University College London" "IslamicAzad University, Qazvin, Iran" KIT University of the State of Baden-W rttemberg and National Laboratory of the Helmholtz Association "Research Center E. Piaggio , University of Pisa, Pisa, Italy, 2 Faculty of Psychology, University of Florence, Florence, Italy" "University of Zagreb, Faculty of Electrical Engineering and Computing, Unska 3, 10000 Zagreb, Croatia" This article was downloaded from Harvard University s DASH "Program of Computational Science and Engineering, Bo gazi ci University" "Faculty of Mathematics and Computer Science, University of Barcelona, Barcelona, Spain" "DISI, University of Trento, Italy" College of Information Engineering "Faculty of Information Technology, Barrett Hodgson University, Karachi, Pakistan" "bUniversity of Nottingham, School of Computer Science, Nottingham, UK" "P. O. Box 4500 FI-90014 University of Oulu, Finland" University of California at Berkeley / ICSI "Intelligent User Interfaces Lab, Ko c University, Turkey" "Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100190, China" Honda Fundamental Research Labs "Queensland Micro- and Nanotechnology Centre and Grif th School of Engineering, Grif th University" "Division of IT Convergence, Daegu Gyeongbuk Institute of Science and Technology" "University of Zaragoza, Spain" "Assam University, Silchar-788011 Assam University, Silchar" "School of Computer Software, Tianjin University, 300072 Tianjin, China" "University of Alicante, 03690, San Vicente del Raspeig, Alicante, Spain" "Grif th University, QLD, Australia" "Ecole Polytechnique Federale de Lausanne, Signal Processing Institute" "Lab, University College London, London WC1H 0AP, UK. 3Clinical" "Institute for Neural Computation, University of California, San Diego, La Jolla, CA" "Asian University, Taichung, Taiwan" "The Robotics Institute, Carnegie Mellon University, Pittsburgh PA" "Sapienza University of Rome, Italy" "University of Milano-Bicocca, Italy" "Centre for Quantum Computation and Intelligent Systems, University of Technology Sydney, Sydney, Australia" Sponsors: Machine Intelligence Research Labs (MIR Labs "University of S ao Paulo - USP, S ao Paulo - Brazil" "Machine Perception Laboratory, University of California, San Diego" "Ross School of Business, University of Michigan, Ann Arbor, MI, USA" "University of Barcelona, Gran Via de les Corts Catalanes 585, 08007 Barcelona, Spain" University of Cagliari "LIP6, UPMC - Sorbonne University, Paris, France" "Baidu Research, USA 3John Hopkins University" "Computer Science and Software Engineering, The University of Western Australia" "Computer Vision Laboratory, The University of Nottingham" "L3S Research Center, Hannover, Germany" "Science and Intelligence Technology, Shanghai Institutes for Biological Sciences, CAS" "School of Computer Science and Technology, Tianjin University, 300072 Tianjin, China" "a Institute of Anatomy I, School of Medicine, Friedrich Schiller University, Germany" "he University of Hong Kong, Pokfulam" "bSchool of Computer Science and Technology, Harbin Institute of Technology, Harbin 150001, China" "image being generated by the model, include Active Appearance" "Institute of Neuroscience, State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain" "Institute of Advanced Technology, Nanjing University of Posts and Telecommunications, Nanjing" "Robotics Institute, Carnegie Mellon University, Pittsburgh, PA, 15213. USA" "f Neuropsychiatry Section, University of Pennsylvania Medical Center, Hospital of the University of Pennsylvania" "School of Computer Science and Information Systems, Birkbeck College, University of London" "Queen Mary, University of London" University of Sfax SUS college of Engineering and Technology "School of Psychology, Cardiff University, Cardiff, CF10 3AT, UK" "Faculty of Information Technology, Vietnam National University of Agriculture, Hanoi 10000, Vietnam" College of Information Science and Engineering "Facial expression gures prominently in research on almost every aspect of emotion, including psychophys" "Institute for Neural Computation, University of California, San Diego" "Proto Labs, Inc" Institute of Psychology and Behavioral Sciences ATR Interpreting Telecommunications Research Laboratories Fraunhofer Institute for Integrated Circuits IIS "Chalmers University of Technology, SAFER" "Computer Vision Research Group, COMSATS Institute of Information" "TNLIST, Tsinghua University, Beijing, 100084, China" "School of Computer Science, University of Lincoln, U.K" "Suhaila N. Mohammed, Baghdad University, College of Science, Baghdad, Iraq" "The School of Electrical and Electronic Engineering, Yonsei University, 134 Shinchon-Dong" "St. Xavier s Catholic College of Engineering, Nagercoil, India" "Applied computing and mechanics laboratory, Swiss Federal Institute of Technology, 1015 Lausanne, Switzerland" "Human-friendly Welfare Robotic System Engineering Research Center, KAIST" Language Technologies Institute Shaheed Zulfikar Ali Bhutto Institute of Science and Technology Islamabad "Doctor of Philosophy in Computer Science at Cardi University, July 24th" "Faculty of Electrical Engineering, University of Ljubljana, Tr za ska 25, SI-1000 Ljubljana, Slovenia" Northwestern University) to T.E. We thank Vincent De Gardelle for helpful comments on an earlier version of "Faculty of Electrical Engineering, University of Ljubljana, Tr za ska cesta 25, SI-1000 Ljubljana, Slovenia" "HOD, St. Joseph College of Information Technology, Songea, Tanzania" "Birkbeck College, University of London" "The Image Processing and Analysis Lab (LAPI), Politehnica University of Bucharest, Romania" "School of Communication Engineering, Hangzhou Dianzi University, Xiasha Higher Education Zone" Nokia Bell Labs and University of Oxford "PG Scholar, Dr.Pauls Engineering College, Villupuram District, Tamilnadu, India" "VISLab, EBUII-216, University of California Riverside" "University of Waterloo, Waterloo ON N2L3G1, Canada" "Robotics Institute, Carnegie Mellon University, Pittsburgh PA" "Institute of Information Science, Academia Sinica, Taipei, Taiwan" "Computer Science and Engineering, Easwari Engineering College, India" "Faculty of Electrical Engineering, University of Ljubljana, Slovenia" "Assiut University, Assiut 71515, Egypt" "to visually detectable changes in facial appearance, including blushing and tears. These" "Institute of Anthropomatics, Karlsruhe Institute of Technology, Germany" "Hasan Kalyoncu University, Gaziantep, Turkey" "Computer Science Division, The Open University of Israel" "Faculty of Computer and Information Science, University of Ljubljana, Ve cna pot 113, SI-1000 Ljubljana" "Facebook AI Research, 2Dartmouth College" "Computer Science, Engineering and Mathematics School, Flinders University, Australia" "Seattle Paci c University, Seattle, WA 98119-1957, USA" "Key Lab. of Machine Perception, School of EECS, Peking University" "Electrical and Computer Engineering, University of Auckland, New Zealand" "The Blavatnik School of Computer Science, Tel Aviv University, Israel" Thesis. Rochester Institute of Technology. Accessed from cid:63)Stanford University "The Robotics Institute, Carnegie Mellon University" "School of Computer and Information Engineering, Nanyang Institute of Technology, Henan, Nanyang, 473000, P.R" "Institute of Informatics, Istanbul Technical University, Istanbul, 34469, TURKEY" State University of Feira de Santana (UEFS University of Siegen "Neuroscience, Icahn School of Medicine at Mount Sinai, Friedman Brain Institute, New York, NY, United States" "M.Tech, Information Technology, Madras Institute of Technology, TamilNadu, India" "cid:2)Honda RandD Americas, Inc., Boston, MA, USA" tional Taipei University for his help in performing simulations. The author would like to thank Mr. Ming "Skolkovo Institute of Science and Technology (Skoltech), Russia" "USC IRIS Lab, University of Southern California" "Teaching Affairs Office, Chongqing Normal University, Chongqing 401331, China" "EEMCS, University of Twente, Netherlands" "puter Engineering, National University of Singapore, Singapore (e-mails" "School of Computer Science and Engineering, South China University of Technology, Guangzhou, China" "Electrical and Computer Engineering, The University of Memphis" "Held at R.C.Patel Institute of Technology, Shirpur, Dist. Dhule, Maharastra, India" "Robotics Institute, Carnegie Mellon University, Pittsburgh, Pennsylvania" "Machine Intelligence Lab (MIL), Cambridge University" "Co-Guide, Computer Science, Shah and Anchor Kuttchi Engineering College, Mumbai, India" "Nanjing, 210023, China, 4 School of Computer Science and Technology, Nanjing University of Posts and" "School of Information Science and Technology, ShanghaiTech University, Shanghai, 200031, China" "ISTMT, University of Tunis El Manar Address: 9, Rue Docteur Zouhe r Safi 1006; 3Faculty of Medicine of Tunis; Address" "CAS), Institute of Computing Technology, CAS, Beijing, 100190, China" "ACRV, The Australian National University University of Oxford QUVA Lab, University of Amsterdam" "Technology, University of Oradea 410087, Universitatii 1, Romania" "University Health Board, Swansea, United Kingdom" facultyofmathematicsandnaturalsciencesarti cialintelligence22-09-2016|1ATitleA.UthorRijksuniversiteitGroningenSomeFaculty "Institute for Computer Graphics and Vision, Graz University of Technology" "School of Computer Engineering, Sejong University, Seoul, Korea" "Anatomy and Genetics, University of Oxford, Oxford, United Kingdom; 3The Wellcome" "Calgary, 2500 University Dr., N.W. Calgary, AB, Canada T2N 1N4. Tel" "Governance, Keio University" "cid:63)Queen Mary University of London, Imperial College London" "RGPV University, Indore" "Shaanxi Provincial Key Lab on Speech and Image Information Processing, Northwestern Polytechnical University, Xi an, China" Honda Research Institute "cid:5)School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN. 47907, USA" Sarhad University of Science and Information Technology "University of Twente, EEMCS, Netherlands" "School of Computer Science and Technology, Nanjing University of Science and Technology, China" "University of Illinois, Urbana-Champaign University of California, San Diego" "Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece" "School of Data of Computer Science, Sun Yat-sen University, P.R. China" "Michigan State University, East Lansing, MI 48824, U.S.A" "Rutgers, The State University of New Jersey, Piscataway, NJ" "Asian Institute of Technology, Pathumthani, Thailand" "Center for Arti cial Vision Research, Korea University" "Korea Electronics Technology Institute, 203-103 B/D 192, Yakdae-Dong" "Technical University of Munich, Germany" "City University of Hong Kong, Kowloon 999077, Hong Kong, China" "Laboratory, University of Houston, Houston, TX, USA" "School of Computer Science, University of Lincoln, United Kingdom" "School of Electrical and Computer Engineering, RMIT University, Melbourne, Australia" "Ponti cal Catholic University of Rio de Janeiro, Brazil" "School of Computer Science, Wuyi University, Jiangmen 529020, China" Institute of Deep Learning "Institute of Information Science, Beijing Jiaotong University, Beijing 100044, P.R. China" "Computational Biomedicine Laboratory, University of Houston, Houston, Texas 77204, USA" "FI-90014 University of Oulu, Finland" "Computer Vision Group, L. D. College of Engineering, Ahmedabad, India" "Arts Media and Engineering, Arizona State University" University of Beira Interior "Institute of Biochemistry, University of Balochistan, Quetta" Ho Chi Minh City University of "Asia University, Taichung, Taiwan" "National Kaohsiung University of Applied Sciences, Kaohsiung, Kaohsiung, Taiwan, ROC" "USC Institute for Robotics and Intelligent Systems (IRIS), Los Angeles, CA" "New York University Shanghai, 1555 Century Ave, Pudong" Facebook 4Texas AandM University 5IBM Research "Institute of Experimental Biology of Polish Academy of Sciences, Warsaw, Poland" yAristotle University of Thessaloniki "School of Electronics and Information Engineering, Tongji University, Caoan Road 4800, Shanghai" "CVSSP, University of Surrey" ShahidBeheshti University "Electronics Engineering, National Institute of Technical Teachers" "Sichuan Fine Arts Institute, Chongqing, China" "tion [11, 10] is making possible very large scale visual recognition both in my own ongoing work, including" "Institute for Electronics, Signal Processing and Communications" National Institute of Development Administration "EEMCS, University of Twente, The Netherlands" UvA-DARE is a service provided by the library of the University of Amsterdam (http://dare.uva.nl "College of Sciences, Northeastern University, Shenyang 110819, China" "and bDivision of Engineering and Applied Sciences 136-93, California Institute of Technology, Pasadena, CA" Dietrich College of Humanities and Social Sciences "School of Electronic and Information Engineering, Tongji University, Shanghai, China" "School of Information Technology and Electrical Engineering, The University of Queensland" "Institute of Systems and Robotics, University of Coimbra, Portugal" "Synergy Systems, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Guangdong" "Center for Automation Research, University of Maryland" "Japan, 2 Center for Special Needs Education, Nara University of Education, Nara-shi, Nara" University of Science and Technology Beijing "Computational Biomedicine Lab, University of Houston, TX, USA" Nam k Kemal University University of Colorado at Colorado Springs University of Freiburg "DESTEC, FLSHR Mohammed V University-Agdal, Rabat, Morocco" "College of Science, Menou a University, Menou a 32721, Egypt" Interactive and Digital Media Institute "College of Computer and Information Science, Northeastern University, MA, USA" "School of Computer and Information, Hefei University of Technology, Hefei" "Research Groups on Intelligent Machines, University of Sfax, Sfax 3038, Tunisia" National Institute of Advanced Industrial USC Institute for Creative Technologies "University of Canberra, Australia, Data61 - CSIRO and ANU, Australia" Institute for Vision Systems Engineering "DCMandB, University of Michigan, Ann Arbor, USA 4 SCS, Carnegie Mellon University, Pittsburgh, USA" "School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore" eBay Research Labs "Research Institute of Child Development and Education, University of Amsterdam, Utrecht, The" Howard Hughes Medical Institute (HHMI "Research Institute of Shenzhen, Wuhan University, Shenzhen, China" "and Modeling, Rutgers University" "Institute of Computing, University of Campinas (Unicamp), Campinas, Brazil, e-mail: ander" "National Institute of Informatics, Japan" "Charotar University of Science and Technology, Changa, India" UniversityofMaryland "Science and Technology, Sun Yat-Sen University, Guangzhou, China, 3 SYSU-CMU Shunde International" "Caarmel Engineering College, MG University, Kerala, India" "Universitat Polit cnica de Catalunya, 6 University of Vigo, 7 LIUM, University of Maine" "Computer Science and Engineering, University of Michigan, Ann Arbor" "J. P. College of Engineering, India" "Universite Catholique de Louvain, Louvain-la-Neuve, Belgium, 4 The Queensland Brain Institute, The" "Center for Machine Vision and Signal Analysis (CMVS), University of Oulu, Finland" "iCV Research Group, Institute of Technology, University of Tartu, Tartu 50411, Estonia" "Engineering Institute, Autonomous University of Baja California, Blvd. Benito Ju rez" Technical University of Kaiserslautern "M.Tech Student, SSG Engineering College, Odisha, India" "learning. As a result of this research, many applications, including video surveillance systems" Taizhou University "Goldsmiths, University of London, London, UK" "China Mobile Research Institute, Xuanwu Men West Street, Beijing" "Human and Health Sciences, Swansea University, Swansea, United Kingdom, 3 Abertawe Bro-Morgannwg" "Multimodal Computing and Interaction, Saarland University, Germany" "School of Computer Science, Northwestern Polytechnical University, China" "Intelligent Systems Group, University of Groningen, The Netherlands" "Center for Automation Research, UMIACS, University of Maryland, College Park, MD 20742 USA" "College of software, Chongqing University of Posts and Telecommunications Chongqing" "Vision and Sensing, HCC Lab, ESTeM, University of Canberra" "Computer Science and Arti cial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, MA, USA" "P.A. College of Engnineering, Mangalore" "Beijing Institute of Technology, Beijing 100081, PR China" "M.H Saboo Siddik College of Engineering, University of Mumbai, India" "School of Computer Science, Carnegie Mellon University, USA" "Computer Science Division, The Open University of Israel, Israel" Achariya college of Engineering Technology "Courant Institute of Mathematical Sciences and Google Research, New York, NY" High Institute of Medical Technologies "cid:63) Faculty of Computing, Information Systems and Mathematics, Kingston University London" Sun Yat-Sen (Zhongshan) University "School of Electrical and Information Engineering, The University of Sydney, Sydney, NSW, Australia, 2 Sydney Medical" "Institute for Infocomm Research, Singapore" "ECSE, Rensselaer Polytechnic Institute, Troy, NY" "National Institute of Optics, National Research Council, Arnesano, LE, Italy" "Xi an Jiaotong University, China" "North Dakota State University, Fargo, ND58105, USA" University of Twente 2Dublin City University 3Oxford University "School of Electrical, Computer and Energy Engineering, Arizona State University" "Dr.Pauls Engineering College, Villupuram District, Tamilnadu, India" "tum Computation and Intelligent Systems, Faculty of Engineering and Information Technology, University" "Machine Intelligence Group, School of Computer Science, Indian Institute of Information Technology and" "University of Technology, Guangzhou, 510640, P.R.China" "Queen Mary, University of London, E1 4NS, UK" University of Wollongong. For further information contact the UOW "Engineering, Ton Duc Thang University, 19 Nguyen Huu Tho Street, Ho Chi Minh City, Vietman" College of Computer Science and Technology "Coordinated Science Lab, University of Illinois at Urbana-Champaign" Gangnung-Wonju National University "Institute of Digital Media, Peking University, Beijing, 100871, China" "Aristotle University of Thessaloniki, Box 451, 54124 Thessaloniki, Greece" "cid:2)Imperial College London, U.K" "School of Computer Science and Engineering, Southeast University, Nanjing 211189, China" "Cognitive Arti cial Intelligence, Utrecht University, Heidelberglaan 6, 3584 CD, Utrecht" "School of Computer Science, Northwestern Polytechnical University, P.R.China" "Friedrich Schiller University, D-07740 Jena" Mahatma Gandhi Institute of Technology "Research Center for Information Technology Innovation, Academia Sinica, Taipei, Taiwan" "Shenzhen Key Lab of CVPR, Shenzhen Institutes of Advanced Technology" "Max Planck Institute for Informatics, Saarbr ucken, Germany (MPI-INF.MPG.DE" B.S. University of Indonesia "University of T ubingen, T ubingen, Germany" "School of Computer Science, The University of Adelaide, Australia" "University of Amsterdam, Amsterdam, the Netherlands, 2 Leiden University" Honda Research Institute USA "Rm 1365, Stanford University, 401 Quarry Road, Stanford, CA" "Machine Intelligence Laboratory, College of Computer Science, Sichuan University" "University of Nottingham, UK, School of Computer Science" "Massachusetts Institute of Technology, 2Facebook Applied Machine Learning, 3Dartmouth College" "Sogang University, Seoul 121-742, Republic of Korea" Imperial College London / Twente University "National University of Singapore, 2Shanghai Jiao Tong University" "School of Software, Tsinghua University, Beijing 100084, China" "SRV Engineering College, sembodai, india" Central Mechanical Engineering Research Institute "Shenzhen Key Laboratory of Spatial Smart Sensing and Service, Shenzhen University, P.R. China" "Gayathri.S, M.E., Vins Christian college of Engineering" "Universiteit van Amsterdam, Roeterstraat 15, 1018 WB Amsterdam, The Netherlands" "CVSSP, University of Surrey, UK" Sanghvi Institute of Management and Science "Multimedia Laboratory, The Chinese University of Hong Kong, Hong Kong" "U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, MD USA" "National Laboratory on Machine Perception, Peking University, Beijing, P.R. China" "Computer Science, Beijing Institute of Technology, Beijing 100081, P.R.China" College of Information and Electrical Engineering "aResearch Scholar, Anna University, Chennai, Inida" "School of Computer Science, Tianjin University" "Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA" "b DEI - University of Padova, Via Gradenigo, 6 - 35131- Padova, Italy" "Amsterdam; and 3Center for Experimental Economics and Political Decision Making, University of Amsterdam" "Moscow Institute of Physics and Technology, Institutskiy per., 9, Dolgoprudny, 141701, Russia" University of California at San Diego "Engineering, University of Akron, Akron, OH 44325-3904, USA" "DIEI, University of Perugia, Italy" "Michigan State University, 3115 Engineering Building" "Publication details, including instructions for authors and subscription" "Max Planck Institute for Informatics, Saarbr ucken, Germany" "iCV Research Group, Institute of Technology, University of Tartu, Tartu 50411, Estonia" "University College London, 12 Queen Square, London WC1N 3BG, UK" "Jawaharlal Technological University, Anantapur" SAMSI and Duke University "School of Electrical and Information Engineering, Xi an Jiaotong University, Xi an, China" "MISC Laboratory, Constantine 2 University, Constantine, Algeria" "SRV Engineering College, sembodai, india" "Institute of Computing Technology, CAS" Institute of control science and engineering National Institute of Informatics "Centre for Vision, Speech and Signal Processing, University of Surrey, Guildford, GU2 7XH" Institute for Robotics and Intelligent Systems St. Anne s College "School of Mathematics and Statistics, Xi an Jiaotong University, P. R. China" "DSP Lab, Sharif University of Technology, Tehran, Iran" "J. P. College of Engineering, India" "National Laboratory on Machine Perception, Peking University, Beijing, P.R. China" SUS college of Engineering and Technology "methods, including graph matching, optical- ow-based" "Turin, Italy, 3 Faculty of Humanities, Research Unit of Logopedics, Child Language Research Center, University of Oulu, Oulu" "Michigan State University, NEC Laboratories America" "Polytechnic University of Milan, Milan, 20156, Italy, 3 Applied Electronics" "The Blavatnik School of Computer Science, Tel Aviv University, Israel" "School of Information Engineering, Guangdong Medical College, Song Shan Hu" "Nanjing University of Information Science and Technology, Nanjing, 210044, China" M. Mark Everingham University of Leeds University of California at San Diego "Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100190, China" "PG Scholar, Dr.Pauls Engineering College, Villupuram District, Tamilnadu, India" "Cognitive Brain Research Unit, Institute of Behavioural Sciences, University of" "Cornell University, Ithaca, NY, U.S.A" "Pathological anxiety is associated with disrupted cognitive processing, including working memory and" "Carnegie Mellon University, Electrical and Computer Engineering" "Key Laboratory of Embedded System and Service Computing, Ministry of Education, Tongji University, Shanghai, China" University of Sfax "Arts, Commerce and Science College, Gangakhed, M.S, India" "Sejong University, 98 Gunja, Gwangjin, Seoul 143-747, Korea" "Education, Yunnan Normal University, Kunming, China" "Arti cial Intelligence Institute, China" "bFaculty of Engineering, International Islamic University, Jalan Gombak, 53100 Kuala Lumpur, Malaysia" "University of Zagreb, Faculty of Electrical Engineering and Computing, Unska 3, 10000 Zagreb, Croatia" "AncyRijaV, Author is currently pursuing M.E (Software Engineering) in Vins Christian College of" "Siemens Corporate Research, 755 College Road East, Princeton, NJ" "CAS), Institute of Computing Technology, CAS, Beijing 100190, China" "Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China" "Institute of Biochemistry, University of Balochistan, Quetta" "School of Engineering, University of Portsmouth, United Kingdom" "S.R.C.E.M, Banmore, RGPV, University, Bhopal, Madhya Pradesh, India" "bDiscipline of Business Analytics, The University of Sydney Business School" "Synergy Systems, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Guangdong" "Najafabad Branch, Islamic Azad University" "Center for Cognitive Ubiquitous Computing, Arizona State University, Tempe, AZ, USA" "The school of Data Science, Fudan University" "School of Mathematical Science, Peking University, China" "School of Computer Science, The University of Adelaide, Australia" Institute of Interdisciplinary Studies in Identity Sciences (IISIS "School of Computing, National University of Singapore, SG" University of California at Berkeley / ICSI "School of Electrical Engineering and Automation, Harbin Institute of Technology" Massachusettes Institute of Technology "IBM Watson Research Center, Armonk, NY, USA" B.S. (Cornell University "School of IoT Engineering, Jiangnan University, Wuxi, 214122, China" "Assiut University, Assiut 71515, Egypt" "Science and Technology, Sun Yat-Sen University, Guangzhou, China, 3 SYSU-CMU Shunde International" "SICE, Beijing University of Posts and Telecommunications. 2Center for Imaging Science, Johns Hopkins University" Shandong Women s University "City University of Hong Kong, Kowloon 999077, Hong Kong, China" "School of Computer Science and Technology, Harbin Institute of" Northwestern University) to T.E. We thank Vincent De Gardelle for helpful comments on an earlier version of "Key Lab. of Machine Perception, School of EECS, Peking University, China" "Faculty of Science and Engineering, Waseda University, Tokyo, Japan" "School of Information Engineering, Guangdong Medical College, Song Shan Hu" "Kurukshetra University, Kurukshetra-136 119, Haryana, INDIA" Research Center E. Piaggio "Federal University Technology Akure, PMB 704, Akure, Nigeria" Thesis. Rochester Institute of Technology. Accessed from "The Robotics Institute, Carnegie Mellon University, 5000 Forbes Ave, PA, USA" "Institute of Informatics, Istanbul Technical University, Istanbul, 34469, TURKEY" "Beihang University 2Gri th University 3University of York, UK" "University of Oviedo, Campus de Viesques, 33204 Gij n" "Institute for Vision and Graphics, University of Siegen, Germany" "P. O. Box 4500 Fin-90014 University of Oulu, Finland" Malaviya National Institute of Technology "Universiteit van Amsterdam, Roeterstraat 15, 1018 WB Amsterdam, The Netherlands" "Engineering and Natural Science, Sabanci University, Istanbul, Turkey" "Ecole Polytechnique Federale de Lausanne, Signal Processing Institute" "Faculty of Science, University of Amsterdam, The Netherlands" National Taiwan University of Science and "Graduate School of System Informatics, Kobe University, Kobe, 657-8501, Japan" "DPDCE, University IUAV, Santa Croce 1957, 30135 Venice, Italy" "School of Computer Science and Engineering, Water Resources University, Hanoi 10000, Vietnam" "Institute of Anthropomatics, Karlsruhe Institute of Technology, Germany" "CollegePark, MD" "Academy of Sciences (Grant No. KGZD-EW-T03), and project MMT-8115038 of the Shun Hing Institute of" "School of Computer Science, Wuhan University, P.R. China" "School of Electronic and Computer Engineering, Peking University" COMSATS Institute of Information Technology Wah Cantt yThe University of Tokyo "School of Electronics and Computer Engineering, Peking University" facultyofmathematicsandnaturalsciencesarti cialintelligence22-09-2016|1ATitleA.UthorRijksuniversiteitGroningenSomeFaculty Computer and Vision Research Center "Faculty of Computer Science, University of A Coru na, Coru na, Spain" "Institute of Radioelectronics, Warsaw University of Technology, Warsaw, Poland" "Robotics Institute, Carnegie Mellon University, USA" "Paran a Federal University, Curitiba, Brazil" "Institute of Information Science, Beijing Jiaotong University, Beijing 100044, P.R. China" "Nanjing, 210094, China, 3 School of Automation, Nanjing University of Posts and Telecommunications" "Tsinghua University, State Key Lab. of Intelligent" PES Modern College of Engg K. N. Toosi University of "School of Automation, Beijing University of Posts and Telecommunications, Beijing 100876, China" Research Center for Information "Rowland Institute at Harvard, Cambridge, MA 02142, USA" "College of Computer Science, Zhejiang University, Hangzhou, China" "School of Computer Science, University of Birmingham, UK" "University of Tokyo, 4-6-1 Shirokanedai" "Shenzhen Key Laboratory of High Performance Data Mining, Shenzhen Institutes of Advanced Technology" Achariya college of Engineering Technology "Korea Electronics Technology Institute, Jeonju-si, Jeollabuk-do 561-844, Rep" at West Virginia University "Grad. School at Shenzhen, Tsinghua University" State University of Feira de Santana (UEFS "Human and Health Sciences, Swansea University, Swansea, United Kingdom, 3 Abertawe Bro-Morgannwg" "Catholic University of Rio de Janeiro, Brazil" "Asian Institute of Technology, Pathumthani, Thailand" "Indian Institute of Informaiton Technology, Allahabad, India" "Indian Institute of Technology, Madras, Chennai 600036, INDIA" yAristotle University of Thessaloniki Korea Advanced Institute of Science and Technology (KAIST "B.S. Abdur Rahman University, Chennai-48, India" Imperial College London / Twente University University of Chinese Academy of Mans eld College "LIP6, UPMC - Sorbonne University, Paris, France" "University of Santiago de Compostela, Santiago de Compostela, Spain" "School of Computer Science, Northwestern Polytechnical University, China" "Robotics Institute, Carnegie Mellon University, Pittsburgh, PA, 15213. USA" "Middlesex University London, 4International Hellenic University" "International Islamic University, Islamabad 44000, Pakistan" "College of Computing, Georgia Institute of Technology" "Australian National University, and NICTA" "M.P.M. College, Bhopal, India" "California State University, Fullerton, USA" "EEMCS, University of Twente Enschede, The Netherlands" "IIIS, Tsinghua University" "National Tsing Hua University, Hsin-Chu, Taiwan" M.S. Brunel University of West London "Research Center CENTIA, Electronics and Mechatronics" IBM China Research Lab "ISTMT, University of Tunis El Manar Address: 9, Rue Docteur Zouhe r Safi 1006; 3Faculty of Medicine of Tunis; Address" North Carolina AandT State University "School of Computer Science and Technology, Harbin Institute of Technology, Harbin, China" "University of Queensland, School of ITEE, QLD 4072, Australia" The Author 2014. Published by Oxford University Press "Institute of Automation, Chinese Academy of" "University of Lincoln, School of Computer Science, U.K" "Research Center E. Piaggio , University of Pisa, Pisa, Italy, 2 Faculty of Psychology, University of Florence, Florence, Italy" "cid:2) Imperial College London, United Kingdom" "Principal, Chaithanya Institute of Engineering and Technology, Kakinada, AP, India" "State Research Institute of Aviation Systems (GosNIIAS), Moscow, Russia" "College of Medical Informatics, Chongqing Medical University, Chongqing, China" Australian National University and NICTA "Waseda University, Tokyo, Japan" "School of Computing Sciences, University of East Anglia, Norwich, UK" "Beijing University of Posts and Telecommunications, Beijing, China. 2School of" German Research Center for Arti cial Intelligence (DFKI "Baingio Pinna, University of" "abroad, or from public or private research centers" "IslamicAzad University, Qazvin, Iran" "Institute for Neural Computation, University of California, San Diego" "The Blavatnik School of Computer Science, Tel-Aviv University, Israel" "GRASP Laboratory, University of Pennsylvania, 3330 Walnut Street, Philadelphia, PA, USA" "School of Information Science and Engineering, Central South University, Changsha" "Vision Systems, Inc" "Faculty of Electrical Engineering, University of Ljubljana, Tr za ska cesta" "Graduate School of Information Science, Nagoya University, Japan" "DCMandB, University of Michigan, Ann Arbor, USA 4 SCS, Carnegie Mellon University, Pittsburgh, USA" "Cognitive Arti cial Intelligence, Utrecht University, Heidelberglaan 6, 3584 CD, Utrecht" "School of Computer Science, Carnegie Mellon University, PA, USA" "Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, Poland" "Sathyabama University Old Mamallapuram Road, Chennai, India" "Southeast University, Nanjing 211189, China" "China-Singapore Institute of Digital Media, Singapore" "University of Notre Dame, 2IIIT-Delhi" "Image Processing Center, Beihang University" "Caarmel Engineering College, MG University, Kerala, India" "DESTEC, FLSHR Mohammed V University-Agdal, Rabat, Morocco" College of Computer Science and Technology "School of Informatics, University of Edinburgh, UK" "University of Ljubljana, Faculty of Electrical Engineering, Trzaska 25, 1000 Ljubljana, Slovenia" "Iftm University, Moradabad-244001 U.P" "Biometric and Image Processing Lab, University of Salerno, Italy" "School of Data and Computer Science, Sun Yat-sen University" Northeastern University 2Microsoft Research 3City University of New York "Massachusetts Institute of Technology, 2Facebook Applied Machine Learning, 3Dartmouth College" "University of California at San Diego, La Jolla, CA" "University of Technology, Sydney, 15 Broadway, Ultimo, NSW 2007, Australia" c(cid:176) Massachusetts Institute of Technology 2006. All rights reserved "University of Toronto, Toronto, ON M5S 2G4, Canada" "University of California at Irvine, Irvine, CA" "University Hospital Jena, Germany" "RGPV University, Indore" Facebook 4Texas AandM University 5IBM Research "Mancha, Spain, Imperial College, London, UK" "Division of Information and Computer Engineering, Ajou University, Suwon 443-749, Korea" "University of Zaragoza, Spain" "Hong Kong Applied Science and Technology Research Institute Company Limited, Hong Kong, China" "University of Florence, Italy" "Key Laboratory of Machine Perception, Peking University, Beijing" "K.S.Rangasamy College of Technology, Namakkal, TamilNadu, India" "School of Computer Science and Technology, Shandong Institute of Business and Technology" "College of Information and Control Engineering, China University of Petroleum, Qingdao 266580, China" "University of Cambridge, UK 2Carnegie Mellon University, USA" "Amsterdam; and 3Center for Experimental Economics and Political Decision Making, University of Amsterdam" "Faculty of Electrical Engineering, University of Ljubljana, Tr a ka cesta 25, SI-1000 Ljubljana, Slovenia" "University of Waterloo, Waterloo ON N2L3G1, Canada" "Bo gazic i University, Istanbul, Turkey" "Human-friendly Welfare Robotic System Engineering Research Center, KAIST" "Kong Polytechnic University, Kowloon, Hong Kong" Gangnung-Wonju National University "School of Computer Science, Wuyi University, Jiangmen 529020, China" "The School of Electrical Electronic and Control Engineering, Kongju National University" Taizhou University "Technical University in Prague, 166 27 Prague 6, Technick a 2 Czech Republic" "ECE dept, University of Miami" "Qihoo 360 AI Institute, Beijing, China" University of California at Berkeley "Institute of Arti cial Intelligence and Cognitive Engineering (ALICE), University of Groningen" "Max Planck Institute for Biological Cybernetics, Spemannstr. 38, 72076 T bingen, Germany" Research Center and Laboratoire "EECS, Syracuse University, Syracuse, NY, USA" "University of Cambridge, Computer Laboratory, UK" Moradabad Institute of Technology "ITCS, Tsinghua University" "School of Communication Engineering, Hangzhou Dianzi University, Xiasha Higher Education Zone" "Dnyanopasak College Parbhani, M.S, India" "Faculty of Electrical and Computer Engineering, Tarbiat Modares University, Tehran, Iran" "School of Computer Science and Software Engineering, Shenzhen University" "Francis Xavier Engineering College, Tirunelveli, Tamilnadu, India" Palo Alto Research Center (PARC "Universit Paris-Dauphine, PSL Research University, CNRS, UMR" "Institute of Industrial Science, The University of Tokyo" "State Key Laboratory of Integrated Services Networks, Xidian University, Xi an 710071 China" "National Tsing-Hua University, Hsin-Chu, Taiwan" "BRIC, University of North Carolina at Chapel Hill, NC 27599, USA" "University of Kaiserslautern, Gottlieb-Daimler-Str., Kaiserslautern 67663, Germany" "S J B Institute of Technology, Bangalore, Karnataka, India" "ITEE, The University of Queensland, Australia" "ECE, National University of Singapore, Singapore" Central Mechanical Engineering Research Institute "UC Lab, Kyung Hee University, Yongin-Si 446-701, Korea" "The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong" "Computer Science and Engineering, Anna University, India" "QCIS Centre, FEIT, University of Technology, Sydney, NSW 2007, Australia" "Software, Jiangxi Normal University, Nanchang, China, 4 School of Statistics, Capital University of" "Intelligent Systems Group, University of Groningen, The Netherlands" Curtin University of Technology "f Neuropsychiatry Section, University of Pennsylvania Medical Center, Hospital of the University of Pennsylvania" "Chandigarh Engg. College, Mohali, Punjab, India" "Rm 1365, Stanford University, 401 Quarry Road, Stanford, CA" "Tsinghua-CUHK Joint Research Center for Media Sciences, Technologies and Systems" "Human Computer Interaction Lab., Samsung Advanced Institute of Technology, Korea" "School of Psychology, University of Central Lancashire" "Computational Biomedicine Laboratory, University of Houston, Houston, Texas 77204, USA" "MES College of Engineering, Kuttippuram" "Korean Research Institute of Standards and Science (KRISS), Korea" "Final Year Student, M.Tech IT, Vel Tech Dr. RR andDr. SR Technical University, Chennai" "School of Computer Science, The University of Nottingham" "USC Institute for Robotics and Intelligent Systems (IRIS), Los Angeles, CA" via Institute of Electrical and Electronic Engineers at http://dx.doi.org/10.1109/TIP.2014.2367321. Please refer to "Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece" University of Applied Sciences Darmstadt - CASED Sponsors: Machine Intelligence Research Labs (MIR Labs "Aarhus University, Finlandsgade 22 8200 Aarhus N, Denmark" "Birkbeck College, University of London" "School of Data and Computer Science, Sun Yat-sen University, P.R.China" "iMinds - Ghent University, Technologiepark 15, B-9052 Ghent, Belgium" "School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore. 2Advanced Digital Sciences Center, Singapore" "University of California, Los Angeles" "Institute of Computing, University of Campinas (Unicamp), Campinas, Brazil, e-mail: ander" "School of Electronic and Computer Engineering, Peking University" "RGPV University, Indore" "School of Engineering, University of Portsmouth, United Kingdom" "M.Tech Scholar, MES College of Engineering, Kuttippuram" "Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China" "LITIS EA 4108-QuantIF Team, University of Rouen, 22 Boulevard Gambetta, 76183 Rouen Cedex, France" "Exploratory Computer Vision Group, IBM T. J. Watson Research Center" "Faculty of Electrical Engineering, University of Ljubljana, Tr za ska cesta" "K.S.R. College Of Engineering, Tiruchengode, India" "Lab, University College London, London WC1H 0AP, UK. 3Clinical" "University of Tokyo, 4-6-1 Shirokanedai" "Henan University of Traditional Chinese Medicine, Henan, Zhengzhou, 450000, P.R. China" yAristotle University of Thessaloniki "School of Data Science, Fudan University, China" University of Applied Sciences Darmstadt - CASED "School of Communication Engineering, Hangzhou Dianzi University, Xiasha Higher Education Zone" "School of Electrical and Computer Engineering, RMIT University" "Massachusetts Institute of Technology, 2Facebook Applied Machine Learning, 3Dartmouth College" "Chandigarh Engg. College, Mohali, Punjab, India" "RoboticsResearchGroup, UniversityofOxford, Oxford, UK" "Faculty of EEMCS, Delft University of Technology, The Netherlands" China University of Mining and Technol "University of Technology, Sydney, 15 Broadway, Ultimo, NSW 2007, Australia" "The Blavatnik School of Computer Science, Tel-Aviv University, Israel" Copyright for the publications made accessible via the Queen's University Belfast Research Portal is retained by the author(s) and / or other "QCIS Centre, FEIT, University of Technology, Sydney, NSW 2007, Australia" "School of Electronics and Computer Engineering, Peking University" "Catholic University of Rio de Janeiro, Brazil" "Human Computer Interaction Lab., Samsung Advanced Institute of Technology, Korea" University of Washington and Google Inc Imperial College London / Twente University c(cid:176) Massachusetts Institute of Technology 2006. All rights reserved "University of Zaragoza, Spain" "Siemens Corporate Research, 755 College Road East, Princeton, NJ" "School of Information Science and Technology, Northwestern University, Xi an710127, Shanxi, China" Mme Tinne Tuytelaars Katholieke Universiteit Leuven "Key Lab. of Machine Perception, School of EECS, Peking University, China" "Dartmouth College, 6211 Sudiko Lab, Hanover, NH 03755, USA" "School of Psychology, Cardiff University, Cardiff, CF10 3AT, UK" "Shaoguan University, Da Tang Lu" "International Islamic University, Islamabad 44000, Pakistan" "Engineering and Natural Science, Sabanci University, Istanbul, Turkey" "School of Information Science and Technology, Northwestern University, Xi an710127, Shanxi, China" "Computer Science Division, The Open University of Israel, Israel" Mans eld College "PanimalarInstitute of Technology, Tamilnadu, India" "Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece" "University of Lincoln, School of Computer Science, U.K" "School of Computer Science and Software Engineering, Shenzhen University" "Research Center E. Piaggio , University of Pisa, Pisa, Italy, 2 Faculty of Psychology, University of Florence, Florence, Italy" "Faculty of Engineering and Natural Sciences, Sabanc University, stanbul, Turkey" "P.G. Student, SRV Engineering College, sembodai, India" "Najafabad Branch, Islamic Azad University" Ho Chi Minh City University of Science "School of Computer Science, The University of Adelaide, Australia" "Ecole Polytechnique Federale de Lausanne, Signal Processing Institute" "School of Electronic and Computer Engineering, Peking University" "School of Electronic Engineering and Computer Science, Peking University, 100871, China" "Institute of Industrial Science, The University of Tokyo" "School of Computer Science and Technology, Shandong Institute of Business and Technology" "in signed languages, including American Sign Language (ASL). Gestures such" "Science and Technology, Sun Yat-Sen University, Guangzhou, China, 3 SYSU-CMU Shunde International" "BECS, Aalto University School of Science and Technology, Finland" "College of Medical Informatics, Chongqing Medical University, Chongqing, China" "State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin, China" "Amazon, Inc" "Correspondence should be addressed to: Astrid C. Homan, University of Amsterdam, Weesperplein" Mitsubishi Electric Research Laboratory "Human and Health Sciences, Swansea University, Swansea, United Kingdom, 3 Abertawe Bro-Morgannwg" "Laboratory, University of Houston, Houston, TX, USA" "Exploratory Computer Vision Group, IBM T. J. Watson Research Center" "The school of Data Science, Fudan University" College of Image Arts and Sciences "RoboticsResearchGroup, UniversityofOxford, Oxford, UK" "b Computer Science, School of Electrical and Data Engineering, University of Technology, Sydney" Australian National University and NICTA "Rowland Institute at Harvard, Cambridge, MA 02142, USA" "GRASP Laboratory, University of Pennsylvania, 3330 Walnut Street, Philadelphia, PA, USA" "Kong Polytechnic University, Kowloon, Hong Kong" "Rm 1365, Stanford University, 401 Quarry Road, Stanford, CA" "Center for Automation Research, University of Maryland" "Chonbuk National University, Jeonju 561-756, Korea" c(cid:13)The Chinese University of Hong Kong "cid:63) Faculty of Computing, Information Systems and Mathematics, Kingston University London" "Computer Science, Brown University, Providence, RI, USA" Institute of Interdisciplinary Studies in Identity Sciences (IISIS "Institute of Biochemistry, University of Balochistan, Quetta" "ITCS, Tsinghua University" "Korea Electronics Technology Institute, Jeonju-si, Jeollabuk-do 561-844, Rep" A dissertation submitted to the University of Bristol in accordance with the requirements "Universit Paris-Dauphine, PSL Research University, CNRS, UMR" "University of Kaiserslautern, Gottlieb-Daimler-Str., Kaiserslautern 67663, Germany" University of California at Berkeley / ICSI "ECE, National University of Singapore, Singapore" "Institute of Automation, Chinese Academy of" This work was supported in part by National Institute of Mental Health Award R01 MH 087610 to T.E "Sogang University, Seoul 121-742, Republic of Korea" "Deprtment of Computer Science and Engineering, JNTUA College of Engineering, India" "City University of Hong Kong, Kowloon 999077, Hong Kong, China" "School of Data and Computer Science, Sun Yat-sen University, P.R.China" "West Virginia University, Morgantown, West Virginia, United States of America, 2. IIIT Delhi, New Delhi" "Robotics Institute, Carnegie Mellon University, Pittsburgh, PA" "S J B Institute of Technology, Bangalore, Karnataka, India" "School of Information Science and Engineering, Southeast University, Nanjing, China" "Principal, Chaithanya Institute of Engineering and Technology, Kakinada, AP, India" "K.S.R. College Of Engineering, Tiruchengode, India" "Institute of Arti cial Intelligence and Cognitive Engineering (ALICE), University of Groningen" "School of Computer Science and Engineering, Nanjing University of Science and Technology" Formerly: Texas AandM University "IslamicAzad University, Qazvin, Iran" K. N. Toosi University of "Key Lab. of Machine Perception, School of EECS, Peking University, China" "School of Electronics Engineering and Computer Science, Peking University" "USC Institute for Robotics and Intelligent Systems (IRIS), Los Angeles, CA" Achariya college of Engineering Technology "School of Information Systems, Singapore Management University, Singapore" "Tsinghua-CUHK Joint Research Center for Media Sciences, Technologies and Systems" "Institute of Neuroscience, State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain" "Bo gazic i University, Istanbul, Turkey" Research Center and Laboratoire "Division of Information and Computer Engineering, Ajou University, Suwon 443-749, Korea" "UniversityofMaryland, CollegePark, MD" "Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China" "School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore" "Catholic University of Rio de Janeiro, Brazil" "Middlesex University London, 4International Hellenic University" "School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore. 2Advanced Digital Sciences Center, Singapore" University of Applied Sciences Darmstadt - CASED "Computer Science and Engineering, Anna University, India" "International Islamic University, Islamabad 44000, Pakistan" "University of Notre Dame, 2IIIT-Delhi" "Alin Moldoveanu, Faculty of Automatic Control and Computers, University POLITEHNICA of Bucharest" IBM China Research Lab "cid:2) Imperial College London, United Kingdom" "Indian Institute of Technology, Madras" "CVSSP, University of Surrey" Curtin University of Technology "SICE, Beijing University of Posts and Telecommunications. 2Center for Imaging Science, Johns Hopkins University" German Research Center for Arti cial Intelligence (DFKI "Robotics Institute, Carnegie Mellon University, USA" "Medical Research Council Human Genetics Unit, Institute of Genetics and Molecular" Research Center for Information "Advanced Engineering, The Chinese University of Hong Kong" "Image Processing Center, Beihang University" "University of Barcelona, Gran Via de les Corts Catalanes 585, 08007 Barcelona, Spain" "California State University, Fullerton, USA" "School of Information Science and Technology, Sun Yat-sen University, China" "Games Studio, Faculty of Engineering and IT, University of Technology, Sydney" "Interactive and Digital Media Institute, National University of Singapore, SG" "University of Technology, Sydney, 15 Broadway, Ultimo, NSW 2007, Australia" "National Tsing-Hua University, Hsin-Chu, Taiwan" "f Neuropsychiatry Section, University of Pennsylvania Medical Center, Hospital of the University of Pennsylvania" "DPDCE, University IUAV, Santa Croce 1957, 30135 Venice, Italy" "National Tsing Hua University, Hsin-Chu, Taiwan" "School of Electronics and Computer Engineering, Peking University" "School of IoT Engineering, Jiangnan University, Wuxi, 214122, China" "School of Computer Science, Sichuan University, Chengdu, China" "Tsinghua University, State Key Lab. of Intelligent" "Faculty of Electrical Engineering, University of Ljubljana, Slovenia" "Institute of Anthropomatics, Karlsruhe Institute of Technology, Germany" "Faculty of Electrical and Computer Engineering, Tarbiat Modares University, Tehran, Iran" "School of Communication Engineering, Hangzhou Dianzi University, Xiasha Higher Education Zone" "Computer Vision Group, Friedrich Schiller University of Jena, Germany" "University of Pisa, Largo Lucio" "Institute of Systems and Robotics, University of Coimbra, Portugal" B.S. (Cornell University "Center for Brains, Minds and Machines, McGovern Institute, MIT" Facebook 4Texas AandM University 5IBM Research National Taiwan University of Science and "Engineering, G.H.Raisoni College of Engineering" "Human Computer Interaction Lab., Samsung Advanced Institute of Technology, Korea" "Shenzhen Key Laboratory of High Performance Data Mining, Shenzhen Institutes of Advanced Technology" "and education use, including for instruction at the authors institution" "Southeast University, Nanjing 211189, China" "School of Computer Science and Engineering, Sichuan University, China" "Universiteit van Amsterdam, Roeterstraat 15, 1018 WB Amsterdam, The Netherlands" "Deparment of Computer Science, Queen Mary, University of London, London, E1 4NS, UK" "Jawaharlal Technological University, Anantapur" "School of Computing Sciences, University of East Anglia, Norwich, UK" China University of Mining and Technol "KAUST1, University of Amsterdam2, Qualcomm Technologies, Inc" "Language and Brain Lab, Simon Fraser University, Canada" Mme Tinne Tuytelaars Katholieke Universiteit Leuven "Center for Automation Research, UMIACS, University of Maryland, College Park, MD 20742 USA" "P. O. Box 4500 Fin-90014 University of Oulu, Finland" "School of Data and Computer Science, Sun Yat-sen University" "School of Electrical Engineering and Automation, Harbin Institute of Technology" "UC Lab, Kyung Hee University, Yongin-Si 446-701, Korea" Massachusettes Institute of Technology Submitted to the Institute for Graduate Studies in "Faculty of Electrical Engineering, University of Ljubljana, Tr za ska cesta" "Held at R.C.Patel Institute of Technology, Shirpur, Dist. Dhule, Maharastra, India" "bDiscipline of Business Analytics, The University of Sydney Business School" "Electronics and Computer Science, University of Southampton, Southampton, Hampshire" "QCIS Centre, FEIT, University of Technology, Sydney, NSW 2007, Australia" "Academy of Sciences (Grant No. KGZD-EW-T03), and project MMT-8115038 of the Shun Hing Institute of" Sponsors: Machine Intelligence Research Labs (MIR Labs "Gatsby Computational Neuroscience Unit, University College London, London, UK" "Indian Institute of Technology, Madras, Chennai 600036, INDIA" "China-Singapore Institute of Digital Media, Singapore" Datta Meghe College of Engineering "College of Computer and Information Science, Southwest University, Chongqing 400715, China" "Institute for Vision and Graphics, University of Siegen, Germany" "Islamic Azad University, Qazvin, Iran" "The Open University of Israel, Israel" Nanjing University of Science and "School of Mathematical Science, Peking University, China" "University of Santiago de Compostela, Santiago de Compostela, Spain" "Human-friendly Welfare Robotic System Engineering Research Center, KAIST" University of California at Berkeley / ICSI "Universiteit van Amsterdam, Roeterstraat 15, 1018 WB Amsterdam, The Netherlands" University of California at Berkeley "Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, Poland" "School of Computing, Staffordshire University" "Beijing University of Posts and Telecommunications, Beijing, China. 2School of" "School of Electrical Engineering and Automation, Harbin Institute of Technology" "Massachusetts Institute of Technology, 2Facebook Applied Machine Learning, 3Dartmouth College" "Information Engineering, P. O. Box 4500 FI-90014 University of Oulu, Finland" Max Planck Institute f ur biologische Kybernetik "Games Studio, Faculty of Engineering and IT, University of Technology, Sydney" "Engineering, University of Dundee" "Human and Health Sciences, Swansea University, Swansea, United Kingdom, 3 Abertawe Bro-Morgannwg" "Henan University of Traditional Chinese Medicine, Henan, Zhengzhou, 450000, P.R. China" "School of Information Engineering, Guangdong Medical College, Song Shan Hu" "VSB Technical University of Ostrava, 17. listopadu 15, 708 33 Ostrava, Czech Republic" Mme Tinne Tuytelaars Katholieke Universiteit Leuven A dissertation submitted to the University of Bristol in accordance with the requirements "Graduate School of System Informatics, Kobe University, Kobe, 657-8501, Japan" "abroad, or from public or private research centers" This work was supported in part by National Institute of Mental Health Award R01 MH 087610 to T.E "Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA" "Australian National University, and NICTA" "GRASP Laboratory, University of Pennsylvania, 3330 Walnut Street, Philadelphia, PA, USA" and the institute of engineering and science "Deparment of Computer Science, Queen Mary, University of London, London, E1 4NS, UK" "aDivision of Biology and Biological Engineering 156-29, Howard Hughes Medical Institute, California Institute of Technology, Pasadena, CA" "Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences" "DPDCE, University IUAV, Santa Croce 1957, 30135 Venice, Italy" Sponsors: Machine Intelligence Research Labs (MIR Labs "Qihoo 360 AI Institute, Beijing, China" "State Research Institute of Aviation Systems (GosNIIAS), Moscow, Russia" "Faculty of Engineering and Natural Sciences, Sabanc University, stanbul, Turkey" "Center for Information Science, Peking University, Beijing 100871, China" "Alin Moldoveanu, Faculty of Automatic Control and Computers, University POLITEHNICA of Bucharest" "City University of Hong Kong, Kowloon 999077, Hong Kong, China" "Waseda University, Tokyo, Japan" "College of Medicine, Seoul National University" "School of Data and Computer Science, Sun Yat-Sen University, China" "University Politehnica of Bucharest, Romania, Address Splaiul Independent ei" Submitted to the Institute for Graduate Studies in "PanimalarInstitute of Technology, Tamilnadu, India" "Engineering Institute, Autonomous University of Baja California, Blvd. Benito Ju rez" "LITIS EA 4108-QuantIF Team, University of Rouen, 22 Boulevard Gambetta, 76183 Rouen Cedex, France" "University of Zaragoza, Spain" "Shaoguan University, Da Tang Lu" "Rm 1365, Stanford University, 401 Quarry Road, Stanford, CA" "California State University, Fullerton, USA" "ZHAW Datalab, Zurich University of Applied Sciences" University of Applied Sciences Darmstadt - CASED "Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel" "University of Ljubljana, Faculty of Electrical Engineering, Trzaska 25, 1000 Ljubljana, Slovenia" "School of Computer Science, Wuyi University, Jiangmen 529020, China" "School of Information Science and Engineering, Southeast University, Nanjing, China" "Faculty of Electrical and Computer Engineering, Tarbiat Modares University, Tehran, Iran" "The School of Electrical Electronic and Control Engineering, Kongju National University" "to process in all the illumination conditions, including total" Mitsubishi Electric Research Laboratory "Grad. School at Shenzhen, Tsinghua University" "Kurukshetra University, Kurukshetra-136 119, Haryana, INDIA" "School of Information Science and Technology, Sun Yat-sen University, China" "School of Info. and Commu. Engineering, Beijing University of Posts and Telecommunications" "M.Tech Scholar, MES College of Engineering, Kuttippuram" Northeastern University 2Microsoft Research 3City University of New York Korea Advanced Institute of Science and Technology (KAIST "Institute of Anthropomatics, Karlsruhe Institute of Technology, Germany" "University of Notre Dame, 2IIIT-Delhi" "Research Center E. Piaggio , University of Pisa, Pisa, Italy, 2 Faculty of Psychology, University of Florence, Florence, Italy" "IBM Watson Research Center, Armonk, NY, USA" "Middlesex University London, 4International Hellenic University" Australian National University and NICTA "UniversityofMaryland, CollegePark, MD" "University of Freiburg, Instit ut f ur Informatik" "Aarhus University, Finlandsgade 22 8200 Aarhus N, Denmark" "Institute for Neural Computation, University of California, San Diego" "School of Computing, National University of Singapore, SG" "Intelligent Systems Group, University of Groningen, The Netherlands" "School of Data and Computer Science, Sun Yat-sen University" "School of Computer Science and Software Engineering, Shenzhen University" "School of Mathematical Science, Peking University, China" "KAUST1, University of Amsterdam2, Qualcomm Technologies, Inc" "Faculty of Computer Science, Dalhousie University, Halifax, Canada" "International Islamic University, Islamabad 44000, Pakistan" "Image Processing Center, Beihang University" "School of Computer Science and Technology, Harbin Institute of" Dalle Molle Institute for Arti cial Intelligence "Dnyanopasak College Parbhani, M.S, India" "Current Address: Research Institute of Child Development and Education, University of Amsterdam" IBM China Research Lab "Shenzhen Key Laboratory of High Performance Data Mining, Shenzhen Institutes of Advanced Technology" "The Remote Sensing Technology Institute (IMF), German Aerospace Center" Nanjing University of Science and "SRI International, Menlo Park California / *Brooklyn College, Brooklyn New York" "Research Institute of Child Development and Education, University of Amsterdam, Utrecht, The" "Tsinghua University, State Key Lab. of Intelligent" "Chandigarh Engg. College, Mohali, Punjab, India" "Shaanxi Provincial Key Lab on Speech and Image Information Processing, Northwestern Polytechnical University, Xi an, China" University of Wollongong. For further information contact the UOW "School of Psychology, University of Central Lancashire" "RGPV University, Indore" "P. O. Box 4500 Fin-90014 University of Oulu, Finland" University of Washington and Google Inc "United States of America, State University of New York Albany, Albany" "engineering, Government College of Engineering Kannur, Kerala, India" "RoboticsResearchGroup, UniversityofOxford, Oxford, UK" facultyofmathematicsandnaturalsciencesarti cialintelligence22-09-2016|1ATitleA.UthorRijksuniversiteitGroningenSomeFaculty "UC Lab, Kyung Hee University, Yongin-Si 446-701, Korea" "Nokia Research Center, Tampere, Finland" "Technical University in Prague, 166 27 Prague 6, Technick a 2 Czech Republic" Research Center for Information Research Center E. Piaggio "The Robotics Institute, Carnegie Mellon University, 5000 Forbes Ave, PA, USA" "Institute of Software, Chinese Academy of Sciences, Beijing 100190, China" "School of Computer Science, The University of Nottingham" "School of Computer Science, Carnegie Mellon University, PA, USA" B.S. (Cornell University "Lab, University College London, London WC1H 0AP, UK. 3Clinical" Taizhou University "Center for Cognitive Ubiquitous Computing, Arizona State University, Tempe, AZ, USA" "LIP6, UPMC - Sorbonne University, Paris, France" "School of Computer Science and Technology, Tianjin University, China" "Sorbonne Universit s, UPMC University Paris 06, Paris, France" "Center for Brain Science, Harvard University, Cambridge, MA 02138 USA" "Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece" "Biometric and Image Processing Lab, University of Salerno, Italy" "ITEE, The University of Queensland, Australia" "Interdisciplinary Program in Visual Information Processing, Korea University, Seoul, Korea" "School of Electronic and Information Engineering, Beihang University, Beijing, 100191, China" PES Modern College of Engg Facebook 4Texas AandM University 5IBM Research "Institute of Information Science, Beijing Jiaotong University, Beijing 100044, P.R. China" "University Hospital Jena, Germany" "GREYC UMR CNRS 6072 ENSICAEN-Image Team, University of Caen Basse-Normandie, 6 Boulevard Mar echal Juin" "b School of Business, Reykjavik University, Reykjavik, Iceland" University of Bristol - Explore Bristol Research COMSATS Institute of Information Technology Wah Cantt Moradabad Institute of Technology via Institute of Electrical and Electronic Engineers at http://dx.doi.org/10.1109/TIP.2014.2367321. Please refer to "Samsung RandD Institute America - Dallas, 1301 East Lookout Drive, Richardson, TX 75082, USA" Copyright for the publications made accessible via the Queen's University Belfast Research Portal is retained by the author(s) and / or other "Federal Institute of Science and Technology, Mookkannoor" "Hong Kong Applied Science and Technology Research Institute Company Limited, Hong Kong, China" "School of Computer and Information Engineering, Nanyang Institute of Technology, Henan, Nanyang, 473000, P.R" "School of Computer Science and Engineering, South China University of Technology, Guangzhou 510006, China" "Laboratory, University of Houston, Houston, TX, USA" "College of Computer Science and Technology, Chongqing" State University of Feira de Santana (UEFS National Taiwan University of Science and "Robotics Institute, Carnegie Mellon University, Pittsburgh, PA" "School of IoT Engineering, Jiangnan University, Wuxi, 214122, China" "School of Computer Science and Engineering, South China University of Technology" "Center for Automation Research, UMIACS, University of Maryland, College Park, MD 20742 USA" Malaviya National Institute of Technology "School of Electronics Engineering and Computer Science, Peking University" "Advanced Digital Sciences Center (ADSC), University of Illinois at Urbana-Champaign, Singapore" "Indian Institute of Technology, Madras, Chennai 600036, INDIA" "Institute of Industrial Science, The University of Tokyo" "Faculty of Science, University of Amsterdam, The Netherlands" Formerly: Texas AandM University "USC Institute for Robotics and Intelligent Systems (IRIS), Los Angeles, CA" University of Chinese Academy of "College of Computing, Georgia Institute of Technology" "School of Automation, Beijing University of Posts and Telecommunications, Beijing 100876, China" "Kong Polytechnic University, Kowloon, Hong Kong" "Francis Xavier Engineering College, Tirunelveli, Tamilnadu, India" "and IBUG [32]. All of them cover large variations, including different" "Computer Science, Engineering and Mathematics School, Flinders University, Australia" "Bo gazic i University, Istanbul, Turkey" "University of the South Paci c, Fiji" "and 2Center for Cognitive Neuroscience, Duke University, Durham, North Carolina 27708" "Affiliated to Guru Gobind Singh Indraprastha University, Delhi, India" Institute of Interdisciplinary Studies in Identity Sciences (IISIS "DCMandB, University of Michigan, Ann Arbor, USA 4 SCS, Carnegie Mellon University, Pittsburgh, USA" Achariya college of Engineering Technology Shandong Women s University "Interactive and Digital Media Institute, National University of Singapore, SG" "University of Barcelona, Gran Via de les Corts Catalanes 585, 08007 Barcelona, Spain" "Language and Brain Lab, Simon Fraser University, Canada" "School of Computer Science, Northwestern Polytechnical University, China" "Paran a Federal University, Curitiba, Brazil" "National Key Laboratory for Novel Software Technology, Nanjing University, Nanjing 210093, China" "University of Cambridge, Computer Laboratory, UK" "School of Computer Science, The University of Manchester" "USA, 2Unit for Experimental Psychiatry, University of Pennsylvania School of Medicine" B.S. University of Indonesia "Jawaharlal Technological University, Anantapur" "Institute of Automation, Chinese Academy of" "Key Laboratory of Machine Perception, Peking University, Beijing" "State Key Lab of CADandCG, College of Computer Science, Zhejiang University, Hangzhou, China" "Toyota College, 2-1 Eisei, Toyota-shi, Aichi, 471-8525 Japan" "Dartmouth College, 6211 Sudiko Lab, Hanover, NH 03755, USA" "Vision Systems, Inc" c(cid:176) Massachusetts Institute of Technology 2006. All rights reserved China University of Mining and Technol "ECE dept, University of Miami" "University of Technology, Guangzhou, 510640, P.R.China" "CAS), Institute of Computing Technology, CAS, Beijing 100190, China" Mans eld College "P.G. Student, SRV Engineering College, sembodai, India" "f Neuropsychiatry Section, University of Pennsylvania Medical Center, Hospital of the University of Pennsylvania" "School of Computer Science, University of Birmingham, UK" "Learning Systems Group, California Institute of Technology" Curtin University of Technology "The school of Data Science, Fudan University" "The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong" "Division of Computer Science, University of California, Berkeley, CA, USA e-mail" "School of Engineering, University of Portsmouth, United Kingdom" "School of Information Systems, Singapore Management University, Singapore" "CollegePark, MD" "Gatsby Computational Neuroscience Unit, University College London, London, UK" "Faculty of Electrical Engineering, University of Ljubljana, Slovenia" "Rowland Institute at Harvard, Cambridge, MA 02142, USA" "National Institute of Optics, National Research Council, Arnesano, LE, Italy" "Assiut University, Assiut 71515, Egypt" "PG Scholar, Hindusthan College of Engineering and Technology, Coimbatore, India" "School of Psychology, Cardiff University, Cardiff, CF10 3AT, UK" "School of Communication Engineering, Hangzhou Dianzi University, Xiasha Higher Education Zone" "University of Toronto, Toronto, ON M5S 2G4, Canada" "EECS, Syracuse University, Syracuse, NY, USA" Massachusetts Institute of Technology Rapporteur "Software, Jiangxi Normal University, Nanchang, China, 4 School of Statistics, Capital University of" "Science and Technology, Sun Yat-Sen University, Guangzhou, China, 3 SYSU-CMU Shunde International" "Sathyabama University Old Mamallapuram Road, Chennai, India" "University of Oradea 410087, Universitatii 1, Romania" "Heilongjiang University, College of Computer Science and Technology, China" "Faculty of Computer Science, University of A Coru na, Coru na, Spain" "University of Cambridge, UK 2Carnegie Mellon University, USA" "Sogang University, Seoul 121-742, Republic of Korea" "Final Year Student, M.Tech IT, Vel Tech Dr. RR andDr. SR Technical University, Chennai" "VISILAB group, University of Castilla-La Mancha, E.T.S.I.Industriales, Avda. Camilo Jose Cela s.n, 13071 Spain" "Korean Research Institute of Standards and Science (KRISS), Korea" "IIIT-Delhi, India, 2West Virginia University" "Key Lab. of Machine Perception, School of EECS, Peking University, China" "and education use, including for instruction at the authors institution" "School of Computer Science, Sichuan University, Chengdu, China" "Graduate School of Information Science, Nagoya University, Japan" "Electronics and Computer Science, University of Southampton, Southampton, Hampshire" "School of Electronic Engineering and Computer Science, Peking University, 100871, China" "Computer Science, Brown University, Providence, RI, USA" "School of Data Science, Fudan University, China" "Institute of Deep Learning, Baidu Research" "Faculty of Information Technology, Vietnam National University of Agriculture, Hanoi 10000, Vietnam" "School of Computer Science, Wuhan University, P.R. China" "Human Computer Interaction Lab., Samsung Advanced Institute of Technology, Korea" "Center for Computational Biomedicine Imaging and Modeling Center, Rutgers University, New Brunswick, NJ" "NEC Laboratories America, Inc" "b Computer Science, School of Electrical and Data Engineering, University of Technology, Sydney" Northwestern University) to T.E. We thank Vincent De Gardelle for helpful comments on an earlier version of "University of Kaiserslautern, Gottlieb-Daimler-Str., Kaiserslautern 67663, Germany" "Siemens Corporate Research, 755 College Road East, Princeton, NJ" "cid:2) Imperial College London, United Kingdom" "Computational Biomedicine Laboratory, University of Houston, Houston, Texas 77204, USA" Moradabad Institute of Technology "Narayana Pharmacy College, Nellore, India" "LIP6, UPMC - Sorbonne University, Paris, France" "University of California, Los Angeles" "Beijing University of Posts and Telecommunications, Beijing, China. 2School of" yAristotle University of Thessaloniki "College of Information and Communication Engineering, Sungkyunkwan University, Suwon-si, Gyeonggi" "School of Information Science and Engineering, Central South University, Changsha" University of Washington and Google Inc "Center for Automation Research, University of Maryland, College Park, MD 20742, USA" "Heilongjiang University, College of Computer Science and Technology, China" Vector Institute for Arti cial Intelligence "Software, Jiangxi Normal University, Nanchang, China, 4 School of Statistics, Capital University of" "Global Big Data Technologies Centre (GBDTC), University of Technology Sydney, Australia" "Samsung RandD Institute America - Dallas, 1301 East Lookout Drive, Richardson, TX 75082, USA" "Research Institute, 138 Gajeongno, Yuseong-gu, Daejeon, 305-700, Republic of Korea" "Institute of Systems and Robotics - University of Coimbra, Portugal" Central Mechanical Engineering Research Institute "Gatsby Computational Neuroscience Unit, University College London, London, UK" A dissertation submitted to the University of Bristol in accordance with the requirements "Pompeu Fabra University, Spain" "Australian National University, and NICTA" "International Islamic University, Islamabad 44000, Pakistan" "Center for Cognitive Ubiquitous Computing, Arizona State University, Tempe, AZ, USA" "BECS, Aalto University, Helsinki, Finland" "NEC Laboratories America, Inc" "Caarmel Engineering College, MG University, Kerala, India" Malaviya National Institute of Technology "Faculty of Computer Science, Mathematics, and Engineering, University of Twente, Enschede, Netherlands" "DPDCE, University IUAV, Santa Croce 1957, 30135 Venice, Italy" "EECS, Syracuse University, Syracuse, NY, USA" "University of Waterloo, Waterloo ON N2L3G1, Canada" K. N. Toosi University of "University Politehnica of Bucharest, Romania, Address Splaiul Independent ei" Massachusetts Institute of Technology Rapporteur "Chandigarh Engg. College, Mohali, Punjab, India" "Faculty of Electrical Engineering, University of Ljubljana, Tr za ska cesta" "Human-friendly Welfare Robotic System Engineering Research Center, KAIST" B.S. (Cornell University "QCIS Centre, FEIT, University of Technology, Sydney, NSW 2007, Australia" "L3S Research Center, Hannover, Germany" "College of Computing, Georgia Institute of Technology" "School of Electrical and Computer Engineering, RMIT University" "School of Computer Science and Technology, Zhejiang University of Technology, Hangzhou 310023, China" "Institute for Neural Computation, University of California, San Diego" "The Robotics Institute, Carnegie Mellon University, 5000 Forbes Ave, PA, USA" yThe University of Tokyo "Henan University of Traditional Chinese Medicine, Henan, Zhengzhou, 450000, P.R. China" "Shaoguan University, Da Tang Lu" "University Hospital Jena, Germany" "Massachusetts Institute of Technology, 2Facebook Applied Machine Learning, 3Dartmouth College" University of California at Berkeley / ICSI "University of Cambridge, Computer Laboratory, UK" "School of Computer Science, Sichuan University, Chengdu, China" "Federal University Technology Akure, PMB 704, Akure, Nigeria" Max Planck Institute f ur biologische Kybernetik "Learning Systems Group, California Institute of Technology" "Universiteit van Amsterdam, Roeterstraat 15, 1018 WB Amsterdam, The Netherlands" "Vision Systems, Inc" "ZHAW Datalab, Zurich University of Applied Sciences" "School of Computer Science and Engineering, Water Resources University, Hanoi 10000, Vietnam" "School of Psychology, University of Central Lancashire" B.S. University of Indonesia "University of Ljubljana, Faculty of Electrical Engineering, Trzaska 25, 1000 Ljubljana, Slovenia" "School of Automation, Beijing University of Posts and Telecommunications, Beijing 100876, China" "University of California at Irvine, Irvine, CA" "RoboticsResearchGroup, UniversityofOxford, Oxford, UK" "University of Queensland, School of ITEE, QLD 4072, Australia" "IslamicAzad University, Qazvin, Iran" "Environment, Northumbria University, Newcastle, NE1 8ST, United Kingdom" "School of Data and Computer Science, Sun Yat-Sen University, China" "School of Informatics, University of Edinburgh, UK" "United States of America, State University of New York Albany, Albany, New York" "Rutgers, The State University of New Jersey, Piscataway, NJ" University of California at Berkeley Formerly: Texas AandM University "University of Pisa, Largo Lucio" "Islamic Azad University, Qazvin, Iran" "Human and Health Sciences, Swansea University, Swansea, United Kingdom, 3 Abertawe Bro-Morgannwg" "Engineering, University of Akron, Akron, OH 44325-3904, USA" "Institute for Vision and Graphics, University of Siegen, Germany" "Institute of Systems and Robotics, University of Coimbra, Portugal" "University of Notre Dame, 2IIIT-Delhi" College of Computer Science and Technology China University of Mining and Technol "Universit Paris-Dauphine, PSL Research University, CNRS, UMR" "Synergy Systems, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Guangdong" "Interdisciplinary Program in Visual Information Processing, Korea University, Seoul, Korea" "School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore. 2Advanced Digital Sciences Center, Singapore" Central Mechanical Engineering Research Institute "SRM University, Kattankulathur, Chennai-603 203, Tamilnadu, India" "Southeast University, Nanjing 211189, China" "Iftm University, Moradabad-244001 U.P" "Kurukshetra University, Kurukshetra-136 119, Haryana, INDIA" "Exploratory Computer Vision Group, IBM T. J. Watson Research Center" "CAS), Institute of Computing Technology, CAS, Beijing 100190, China" "University of California at San Diego, La Jolla, CA" "Engineering, University of Akron, Akron, OH 44325-3904, USA" "School of Data and Computer Science, Sun Yat-Sen University, China" "Samsung RandD Institute America - Dallas, 1301 East Lookout Drive, Richardson, TX 75082, USA" "Division of Computer Science, University of California, Berkeley, CA, USA e-mail" "Faculty of Engineering and Natural Sciences, Sabanc University, stanbul, Turkey" "School of Computer Science and Technology, Shandong Institute of Business and Technology" "School of Computing, Staffordshire University" University of Bristol - Explore Bristol Research Northeastern University 2Microsoft Research 3City University of New York "National Key Laboratory for Novel Software Technology, Nanjing University, Nanjing 210093, China" "Computer Vision Group, L. D. College of Engineering, Ahmedabad, India" "Aarhus University, Finlandsgade 22 8200 Aarhus N, Denmark" University of Chinese Academy of Max Planck Institute f ur biologische Kybernetik "ZHAW Datalab, Zurich University of Applied Sciences" "The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong" "University of Queensland, School of ITEE, QLD 4072, Australia" University of California at Berkeley / ICSI "School of Data and Computer Science, Sun Yat-sen University" "Grad. School at Shenzhen, Tsinghua University" "Faculty of Computer Science, University of A Coru na, Coru na, Spain" "Korean Research Institute of Standards and Science (KRISS), Korea" "University of Ulsan, Ulsan, Republic of Korea" "University of Oradea 410087, Universitatii 1, Romania" "Beijing University of Posts and Telecommunications, Beijing, China. 2School of" "Research Center CENTIA, Electronics and Mechatronics" Palo Alto Research Center (PARC "Institute of Software, Chinese Academy of Sciences, Beijing 100190, China" "Center for Information Science, Peking University, Beijing 100871, China" "bDiscipline of Business Analytics, The University of Sydney Business School" "Image Processing Center, Beihang University" "School of Computer Science, University of Birmingham, UK" "Recognition, Institute of Automation, Chinese Academy of Sciences, Beijing, China" "Amsterdam; and 3Center for Experimental Economics and Political Decision Making, University of Amsterdam" "Center for Automation Research (CfAR), University of Maryland, College Park, MD" "Shaanxi Provincial Key Lab on Speech and Image Information Processing, Northwestern Polytechnical University, Xi an, China" "IBM Watson Research Center, Armonk, NY, USA" "EECS, Syracuse University, Syracuse, NY, USA" PES Modern College of Engg "ECE dept, University of Miami" "School of Computer Science, The University of Manchester" "P.G. Student, SRV Engineering College, sembodai, India" "Synergy Systems, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Guangdong" "EEMCS, University of Twente Enschede, The Netherlands" "Faculty of Electrical Engineering, University of Ljubljana, Tr za ska cesta" "RoboticsResearchGroup, UniversityofOxford, Oxford, UK" "Key Laboratory of Machine Perception, Peking University, Beijing" "State Key Lab of CADandCG, College of Computer Science, Zhejiang University, Hangzhou, China" "School of Computer Science and Engineering, Sichuan University, China" "School of Info. and Commu. Engineering, Beijing University of Posts and Telecommunications" "Engineering and Natural Science, Sabanci University, Istanbul, Turkey" "School of Computer Science and Technology, Harbin Institute of Technology, Harbin, China" A dissertation submitted to the University of Bristol in accordance with the requirements "Lab, University College London, London WC1H 0AP, UK. 3Clinical" "Amsterdam; and 3Center for Experimental Economics and Political Decision Making, University of Amsterdam" "The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong" "P. O. Box 4500 FI-90014 University of Oulu, Finland" "Sogang University, Seoul 121-742, Republic of Korea" "National Institute of Optics, National Research Council, Arnesano, LE, Italy" "School of Computing Sciences, University of East Anglia, Norwich, UK" "Center for Automation Research, University of Maryland, College Park, MD 20740, USA" "Center for Automation Research, University of Maryland, College Park, MD 20742, USA" University of Washington and Google Inc "RoboticsResearchGroup, UniversityofOxford, Oxford, UK" "College of Computer and Information Science, Southwest University, Chongqing 400715, China" "Software, Jiangxi Normal University, Nanchang, China, 4 School of Statistics, Capital University of" "Computer Science, Engineering and Mathematics School, Flinders University, Australia" "Dep. of Applied Mathematics and Analysis, University of Barcelona, Spain" "Dnyanopasak College Parbhani, M.S, India" "ISTMT, University of Tunis El Manar Address: 9, Rue Docteur Zouhe r Safi 1006; 3Faculty of Medicine of Tunis; Address" "Korea Electronics Technology Institute, Jeonju-si, Jeollabuk-do 561-844, Rep" "School of Information Engineering, Guangdong Medical College, Song Shan Hu" "Center for Brain Science, Harvard University, Cambridge, MA 02138 USA" "Toyota College, 2-1 Eisei, Toyota-shi, Aichi, 471-8525 Japan" "M.Tech Scholar, MES College of Engineering, Kuttippuram" "Medical Research Council Human Genetics Unit, Institute of Genetics and Molecular" "School of Computer Science and Technology, Zhejiang University of Technology, Hangzhou 310023, China" "National Tsing Hua University, Hsin-Chu, Taiwan" "DSP Lab, Sharif University of Technology, Tehran, Iran" "School of Computer Science and Engineering, Water Resources University, Hanoi 10000, Vietnam" "EEMCS, University of Twente Enschede, The Netherlands" "Computer Vision Group, Friedrich Schiller University of Jena, Germany" "School of Computer Science, Carnegie Mellon University, PA, USA" "cid:2) Imperial College London, United Kingdom" "BECS, Aalto University, Helsinki, Finland" "Laboratory, University of Houston, Houston, TX, USA" Research Center and Laboratoire "Software, Jiangxi Normal University, Nanchang, China, 4 School of Statistics, Capital University of" "MES College of Engineering, Kuttippuram" "University of the South Paci c, Fiji" "Research Institute of Child Development and Education, University of Amsterdam, Utrecht, The" "College of Medical Informatics, Chongqing Medical University, Chongqing, China" "EECS, Syracuse University, Syracuse, NY, USA" "Gatsby Computational Neuroscience Unit, University College London, London, UK" "Faculty of Electrical Engineering, University of Ljubljana, Tr za ska cesta" "Faculty of Engineering, Ain Shams University, Cairo, Egypt" "Visual Computing and Communications Lab, Arizona State University" "Research Reports of CMP, Czech Technical University in Prague, No" "Robotics Institute, Carnegie Mellon University, USA" "Games Studio, Faculty of Engineering and IT, University of Technology, Sydney" and the institute of engineering and science "School of Electronic Engineering and Computer Science, Peking University, 100871, China" "Institute of Computing, University of Campinas (Unicamp), Campinas, Brazil, e-mail: ander" "Computer Science Division, The Open University of Israel, Israel" University of Washington and Google Inc "College of Computing, Georgia Institute of Technology" State University of Feira de Santana (UEFS "Computer Vision Research Group, COMSATS Institute of Information" "Tsinghua-CUHK Joint Research Center for Media Sciences, Technologies and Systems" "School of Computer Science, Wuyi University, Jiangmen 529020, China" "University of Maryland, College Park; 2Arizona State University; 3Xerox Research Centre" "Faculty of Computer Science, University of A Coru na, Coru na, Spain" "S J B Institute of Technology, Bangalore, Karnataka, India" "University of Tokyo, 4-6-1 Shirokanedai" "Technology, Nanjing University of Aero" Northwestern University) to T.E. We thank Vincent De Gardelle for helpful comments on an earlier version of "LITIS EA 4108-QuantIF Team, University of Rouen, 22 Boulevard Gambetta, 76183 Rouen Cedex, France" "School of Informatics, University of Edinburgh, UK" "Institute of Industrial Science, The University of Tokyo" "Federal University Technology Akure, PMB 704, Akure, Nigeria" "University of Kaiserslautern, Gottlieb-Daimler-Str., Kaiserslautern 67663, Germany" "Asian Institute of Technology, Pathumthani, Thailand" "ECE, National University of Singapore, Singapore" "ECE dept, University of Miami" Datta Meghe College of Engineering "University Hospital Jena, Germany" "University of Ljubljana, Faculty of Electrical Engineering, Trzaska 25, 1000 Ljubljana, Slovenia" "Interdisciplinary Program in Visual Information Processing, Korea University, Seoul, Korea" "Islamic Azad University, Qazvin, Iran" "School of Data and Computer Science, Sun Yat-sen University, P.R.China" "b School of Business, Reykjavik University, Reykjavik, Iceland" "Cognitive Arti cial Intelligence, Utrecht University, Heidelberglaan 6, 3584 CD, Utrecht" "Siemens Corporate Research, 755 College Road East, Princeton, NJ" "B.S. Abdur Rahman University, Chennai-48, India" "School of Data and Computer Science, Sun Yat-Sen University, China" "School of Computer Science, The University of Nottingham" "Kong Polytechnic University, Kowloon, Hong Kong" "cid:63) Faculty of Computing, Information Systems and Mathematics, Kingston University London" c(cid:176) Massachusetts Institute of Technology 2006. All rights reserved "Research Center E. Piaggio , University of Pisa, Pisa, Italy, 2 Faculty of Psychology, University of Florence, Florence, Italy" COMSATS Institute of Information Technology Wah Cantt "The Open University of Israel, Israel" "State Research Institute of Aviation Systems (GosNIIAS), Moscow, Russia" "Robotics Institute, Carnegie Mellon University, Pittsburgh, PA, 15213. USA" "Amazon, Inc" "Jawaharlal Technological University, Anantapur" Institute of Interdisciplinary Studies in Identity Sciences (IISIS "Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA" "Adobe Systems, Inc., 345 Park Ave, San Jose, CA" "aSchool of Technology, University of Campinas" "Center for Research in Computer Vision (CRCV), University of Central Florida (UCF" "Intelligent Systems Group, Utrecht University, Padualaan 14, 3508 TB, Utrecht" "State Key Lab. LIESMARS, Wuhan University, China" "School of Computer Science, University of Adelaide, Australia" "Cooperative Medianet Innovation Center, Shanghai Jiaotong University" "Graduate University of Chinese Academy of Sciences, Beijing 100049, China" Digital Media Research Center "School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China" "Lab of Science and Technology, Southeast University, Nanjing 210096, China" "Institute for Information Technology and Communications (IIKT), Otto-von-Guericke-University" Institute of Automatic Control Engineering (LSR "Research Center for Learning Science, Southeast University, Nanjing 210096, China" "Electrical and Computer Engineering, University of Toronto, M5S 3G4, Canada" "Ultra College of Engineering and Technology for Women, India" "Y ld z Teknik University, Istanbul, TR" "School of Computing Science, Simon Fraser University, Canada" "Institute of Child Health, University College London, UK" "cid:130) Computer Perception Lab, California State University, Bakersfield, CA 93311, USA" "Computer vision and Remote Sensing, Berlin university of Technology" "Electrical, Electronics and Automation Section, Universiti Kuala Lumpur Malaysian Spanish Institute"