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Author (up) David Guillamet; Jordi Vitria; B. Shiele edit  doi
openurl 
  Title Introducing a weighted non-negative matrix factorization for image classification Type Journal Article
  Year 2003 Publication Pattern Recognition Letters Abbreviated Journal PRL  
  Volume 24 Issue 14 Pages 2447–2454  
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  Abstract IF: 0.809  
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  Notes OR;MV Approved no  
  Call Number BCNPCL @ bcnpcl @ GVS2003 Serial 382  
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Author (up) David Masip; Agata Lapedriza; Jordi Vitria edit  doi
openurl 
  Title Boosted Online Learning for Face Recognition Type Journal Article
  Year 2009 Publication IEEE Transactions on Systems, Man and Cybernetics part B Abbreviated Journal TSMCB  
  Volume 39 Issue 2 Pages 530–538  
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  Abstract Face recognition applications commonly suffer from three main drawbacks: a reduced training set, information lying in high-dimensional subspaces, and the need to incorporate new people to recognize. In the recent literature, the extension of a face classifier in order to include new people in the model has been solved using online feature extraction techniques. The most successful approaches of those are the extensions of the principal component analysis or the linear discriminant analysis. In the current paper, a new online boosting algorithm is introduced: a face recognition method that extends a boosting-based classifier by adding new classes while avoiding the need of retraining the classifier each time a new person joins the system. The classifier is learned using the multitask learning principle where multiple verification tasks are trained together sharing the same feature space. The new classes are added taking advantage of the structure learned previously, being the addition of new classes not computationally demanding. The present proposal has been (experimentally) validated with two different facial data sets by comparing our approach with the current state-of-the-art techniques. The results show that the proposed online boosting algorithm fares better in terms of final accuracy. In addition, the global performance does not decrease drastically even when the number of classes of the base problem is multiplied by eight.  
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  ISSN 1083–4419 ISBN Medium  
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  Notes OR;MV Approved no  
  Call Number BCNPCL @ bcnpcl @ MLV2009 Serial 1155  
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Author (up) David Masip; Jordi Vitria edit  url
openurl 
  Title Feature Extraction for Nearest Neighbor Classification. Application to Gender Recognition Type Journal
  Year 2005 Publication International Journal of Intelligent Systems, 20(5): 561–576 (IF: 0.657) Abbreviated Journal  
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  Notes OR;MV Approved no  
  Call Number BCNPCL @ bcnpcl @ MaV2005 Serial 562  
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Author (up) David Masip; Jordi Vitria edit  openurl
  Title Boosted discriminant projections for nearest neighbor classification Type Journal
  Year 2006 Publication Pattern Recognition, 39(2): 164–170 Abbreviated Journal  
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  Notes OR;MV Approved no  
  Call Number BCNPCL @ bcnpcl @ MaV2006 Serial 634  
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Author (up) David Masip; Jordi Vitria edit  openurl
  Title Shared Feature Extraction for Nearest Neighbor Face Recognition Type Journal
  Year 2008 Publication IEEE Transactions on Neural Networks Abbreviated Journal  
  Volume 19 Issue 4 Pages 586–595  
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  Notes OR;MV Approved no  
  Call Number BCNPCL @ bcnpcl @ MaV2008 Serial 944  
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