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    Non-linear metric learning using pairwise similarity and dissimilarity constraints and the geometrical structure of data

    , Article Pattern Recognition ; Volume 43, Issue 8 , August , 2010 , Pages 2982-2992 ; 00313203 (ISSN) Soleymani Baghshah, M ; Bagheri Shouraki, S ; Sharif University of Technology
    2010
    Abstract
    The problem of clustering with side information has received much recent attention and metric learning has been considered as a powerful approach to this problem. Until now, various metric learning methods have been proposed for semi-supervised clustering. Although some of the existing methods can use both positive (must-link) and negative (cannot-link) constraints, they are usually limited to learning a linear transformation (i.e., finding a global Mahalanobis metric). In this paper, we propose a framework for learning linear and non-linear transformations efficiently. We use both positive and negative constraints and also the intrinsic topological structure of data. We formulate our metric... 

    Probabilistic non-linear distance metric learning for constrained clustering

    , Article MultiClust 2013 - 4th Workshop on Multiple Clusterings, Multi-View Data, and Multi-Source Knowledge-Driven Clustering, in Conj. with the 19th ACM SIGKDD Int. Conf. on KDD 2013 ; 2013 ; 9781450323345 (ISBN) Babagholami Mohamadabadi, B ; Zarghami, A ; Pourhaghighi, H. A ; Manzuri Shalmani, M. T ; Sharif University of Technology
    2013
    Abstract
    Distance metric learning is a powerful approach to deal with the clustering problem with side information. For semi-supervised clustering, usually a set of pairwise similarity and dissimilarity constraints is provided as supervisory information. Although some of the existing methods can use both equivalence (similarity) and inequivalence (dissimilarity) constraints, they are usually limited to learning a global Mahalanobis metric (i.e., finding a linear transformation). Moreover, they find metrics only according to the data points appearing in constraints, and cannot utilize information of other data points. In this paper, we propose a probabilistic metric learning algorithm which uses... 

    Semi-supervised metric learning using pairwise constraints

    , Article 21st International Joint Conference on Artificial Intelligence, IJCAI-09, Pasadena, CA, 11 July 2009 through 17 July 2009 ; 2009 , Pages 1217-1222 ; 10450823 (ISSN) ; 9781577354260 (ISBN) Soleymani Baghshah, M ; Bagheri Shouraki, S ; Sharif University of Technology
    Abstract
    Distance metric has an important role in many machine learning algorithms. Recently, metric learning for semi-supervised algorithms has received much attention. For semi-supervised clustering, usually a set of pairwise similarity and dissimilarity constraints is provided as supervisory information. Until now, various metric learning methods utilizing pairwise constraints have been proposed. The existing methods that can consider both positive (must-link) and negative (cannot-link) constraints find linear transformations or equivalently global Mahalanobis metrics. Additionally, they find metrics only according to the data points appearing in constraints (without considering other data...